[OCG] Invasion of Venom Rulings

Invasion of rulings.

tl;dr version: Warning wrecks Treatoad, Graydle Combat does funny things to Equip and Continuous Spell/Traps, and Book of Moon solves all problems.

The rulings are sorted by card following the set order.

Invasion of Venom Rulings

Q: A Clear Wing Synchro Dragon on my opponent’s field that was Special Summoned from the Extra Deck is now in face-down Defense Position due to the effect of Swords of Concealing Light. In this situation, can I activate the Pendulum Effect of Performapal Whim Witch?
A: In this scenario, if Clear Wing Synchro Dragon was changed to face-down Defense Position by the effect of Swords of Concealing Light, it is no longer treated as a monster that was Special Summoned from the Extra Deck. Therefore, you cannot activate the Pendulum Effect of Performapal Whim Witch in this case.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19590&keyword=&tag=-1

Q: A Number 24: Dragulas the Vampiric Dragon that was Special Summoned from the Extra Deck is face-up on my opponent’s field. In this situation, if I activate the Pendulum Effect of Performapal Whim Witch, but my opponent chains the effect of Number 24: Dragulas the Vampiric Dragon and changes it to face-down Defense Position, what happens?
A: The Pendulum Effect of Performapal Whim Witch can be activated if your opponent controls a monster that was Special Summoned from the Extra Deck, while you do not. In this scenario, when resolving the effect, even if the monster on your opponent’s field that was Special Summoned from the Extra Deck has been changed to face-down Defense Position, the activated effect of Performapal Whim Witch resolves normally, and it is Special Summoned.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19710&keyword=&tag=-1

Q: Performapal Thunderhino is Special Summoned by the effect of Performapal Hop Hippo. Afterward, if Performapal Thunderhino is sent to the Graveyard, will its effect that applies in the Graveyard be negated?
A: In this scenario, if a monster Special Summoned by the effect of Performapal Hop Hippo is sent to the Graveyard, its effects are no longer negated. Therefore, the effect of Performapal Thunderhino that applies in the Graveyard is not negated, and can be used normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19709&keyword=&tag=-1

Q: Performapal Trump Witch is Special Summoned by the effect of Performapal Hop Hippo. Afterward, if the effect of Performapal Trump Witch is activated by Tributing it, will the effect be negated?
A: Since a monster Special Summoned by the effect of Performapal Hop Hippo has its effects negated, in this scenario, the effect of Performapal Trump Witch that is activated by Tributing it will also be negated. In this case, although the Tributed Performapal Trump Witch is placed face-up in the Extra Deck, you cannot add a Polymerization from your Deck to your hand.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19708&keyword=&tag=-1

Q: Performapal Hip Hippo and Performapal Hop Hippo are both on my field in face-up Attack Position. In this situation, if I activate the effect of Performapal Hop Hippo that changes all monsters on my field to Defense Position, does Performapal Hop Hippo itself also change to Defense Position?
A: When resolving the effect of Performapal Hop Hippo, all monsters present on your field that are in Attack Position are changed to Defense Position. In this scenario, since Performapal Hop Hippo is in face-up Attack Position, its battle position will also change. (Note that if the effect of Performapal Hop Hippo changes 2 or more monsters to Defense Position, the battle positions of these monsters are considered to be changed at the same time.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19589&keyword=&tag=-1

Q: I activate the Pendulum Effect of Performapal Seal Eel, targeting a Performage Hat Tricker on my opponent’s field. If my opponent chains Book of Moon, and changes Performage Hat Tricker to face-down Defense Position, will the Pendulum Effect of Performapal Seal Eel be applied?
A: When resolving the Pendulum Effect of Performapal Seal Eel, if the targeted monster has been changed to face-down Defense Position, its effects are not negated.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19587&keyword=&tag=-1

Q: I activated the monster effect of Performapal Seal Eel this turn, targeting a Set card in my opponent’s Spell & Trap Zone. Afterward, if I activate Harpie’s Feather Duster, and the targeted card that is destroyed is Magician’s Protection, can the effect of Magician’s Protection that Special Summons a Spellcaster-Type monster from the Graveyard be activated?
A: The Set Spell/Trap Card targeted with the effect of Performapal Seal Eel cannot be activated that turn. However, in this scenario, the effect of a Magician’s Protection that was targeted by the effect of Performapal Seal Eel can be activated normally when it is sent to the Graveyard.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19706&keyword=&tag=-1

Q: I activated the monster effect of Performapal Seal Eel this turn, targeting a Set card in my opponent’s Spell & Trap Zone. Afterward, if Skill Drain is activated and the effects of Performapal Seal Eel are negated, can that Set card be activated this turn?
A: In this scenario, if Skill Drain is activated during the turn the effect of Performapal Seal Eel was activated, so that the effects of Performapal Seal Eel are negated, the effect that was already resolved will continue to apply. Therefore, in this scenario, the targeted Set card still cannot be activated.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19588&keyword=&tag=-1

Q: My opponent Special Summoned Performapal Seal Eel this turn and activated its effect, targeting my Set Bottomless Trap Hole. During this turn, if my opponent Tributes Performapal Seal Eel for a Tribute Summon, what happens to its effect?
A: In this scenario, even if Performapal Seal Eel leaves the field, its effect continues to apply. Therefore, in this scenario, even if the monster that is Tribute Summoned by Tributing Performapal Seal Eel has 1500 or more ATK, your Set Bottomless Trap Hole cannot be activated.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19705&keyword=&tag=-1

Q: Performapal Seal Eel and Performapal Chain Giraffe are both Pendulum Summoned at the same time. In this case, can the monster effects of Performapal Seal Eel and Performapal Chain Giraffe each be activated?
A: In this scenario, if Performapal Seal Eel and Performapal Chain Giraffe are both Pendulum Summoned at the same time, you can activate their respective effects. In that case, you can form the Chain in any order, but if you activate the effect of Performapal Seal Eel as Chain Link 1, you will not be able to activate any cards or effects in response and so will not be able to activate the effect of Performapal Chain Giraffe. If the effect of Performapal Chain Giraffe is Chain Link 1, you can then activate the effect of Performapal Seal Eel as Chain Link 2.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19707&keyword=&tag=-1

Q: Can the monster effect of Performapal Chain Giraffe be activated by targeting a face-up Blue-Eyes White Dragon on my opponent’s field?
A: You can activate the monster effect of Performapal Chain Giraffe by targeting a Normal Monster, such as Blue-Eyes White Dragon, that is face-up on your opponent’s field. Since Normal Monsters do not have effects, the effect of Performapal Chain Giraffe will not negate its effects, but will still prevent it from attacking.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19670&keyword=&tag=-1

Q: I activate the monster effect of Performapal Chain Giraffe, targeting a face-up Cardian – Botan ni Cho on my opponent’s field. Afterward, if Skill Drain is activated and the effects of Performapal Chain Giraffe are negated, what happens to the applied effect?
A: The effect of Performapal Chain Giraffe is one that continues to target after it resolves, but is a Trigger Effect activated when it is Normal or Special Summoned. After the effect resolves, if Skill Drain is activated so that the effects of Performapal Chain Giraffe are negated, that effect continues applying. (In this scenario, the targeted Cardian – Botan ni Cho still cannot attack, also its effects are negated.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19704&keyword=&tag=-1

Q: I activate the monster effect of Performapal Chain Giraffe, targeting a face-up Predator Plant Moray Nepenthes on my opponent’s field. Afterward, if Mind Control is activated and Performapal Chain Giraffe changes control to my opponent’s field, what happens to the applied effect?
A: The effect of Performapal Chain Giraffe is activated by targeting 1 face-up monster on the opponent’s field, and then continues to target it after the effect resolves. After the effect resolves, if Performapal Chain Giraffe changes control to your opponent’s field (the controller of the targeted Predator Plant Moray Nepenthes) by the effect of Mind Control, the effect continues to apply normally. Therefore, the effects of Predator Plant Moray Nepenthes are still negated, and it still cannot attack.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19586&keyword=&tag=-1

Q: Can the first effect of Predator Plant Fly Trap be activated by targeting a Level 1 monster, or an Xyz Monster?
A: The first effect of Predator Plant Fly Trap can be activated by targeting a Level 1 monster or an Xyz Monster. In that case, a Predator Counter is placed on the target normally, but since it is not a Level 2 or higher monster, the part of the effect that makes its Level become 1 is not applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19703&keyword=&tag=-1

Q: Can the first effect of Predator Plant Fly Trap be activated by targeting a monster that already has a Predator Counter on it?
A: The first effect of Predator Plant Fly Trap can be activated by targeting a monster that already has a Predator Counter on it. In that case, a Predator Counter is placed on the target normally, and if its Level is 2 or more, the part of the effect that makes its Level become 1 is applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19669&keyword=&tag=-1

Q: My Odd-Eyes Pendulum Dragon has a Predator Counter on it due to the effect of my opponent’s Predator Plant Fly Hell. In this situation, if I activate Counter Cleaner and remove the Predator Counter, what happens to the Level of Odd-Eyes Pendulum Dragon?
A: After a Predator Counter is placed on a monster, the part of the effect that makes that monster’s Level become 1 is applied as long as the Predator Counter remains on it. Therefore, if Counter Cleaner is activated, the Level of the monster that had the Predator Counter removed returns to its original state. (In this case, Odd-Eyes Pendulum Dragon returns to Level 7.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19702&keyword=&tag=-1

Q: A monster with Predator Counters placed on it by the effect of Predator Plant Fly Trap or Predator Plant Squid Drosera is face-up on my field. Can I activate the effect of Star Changer that increases a monster’s Level by 1 by targeting that monster?
A: Yes, you can. In that case, after the monster’s Level is increased by 1, its Level becomes 2. (The Predator Counter will remain on that monster.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19668&keyword=&tag=-1

Q: Can Predator Plant Moray Nepenthes be equipped with 2 or more monsters by its own effect?
A: If a Predator Plant Moray Nepenthes equipped with a monster by its own effect destroys another opponent’s monster by battle, you can activate the effect that equips the destroyed monster to it once again.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19560&keyword=&tag=-1

Q: The Phantom Knights of Tomb Shield that was Special Summoned by its own effect is destroyed by battle with a Predator Plant Moray Nepenthes. In this case, can the effect of Predator Plant Moray Nepenthes that equips the destroyed monster to it be activated?
A: If Predator Plant Moray Nepenthes destroys The Phantom Knights of Tomb Shield by battle, since The Phantom Knights of Tomb Shield is not treated as a monster when it is destroyed and sent to the Graveyard, the effect of Predator Plant Moray Nepenthes cannot be activated.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19701&keyword=&tag=-1

Q: A D/D Savant Kepler is destroyed by battle with a Predator Plant Moray Nepenthes. In this case, can the effect of Predator Plant Moray Nepenthes that equips the destroyed monster to it be activated?
A: In this scenario, a D/D Savant Kepler that is destroyed by battle with Predator Plant Moray Nepenthes is placed face-up in the Extra Deck instead of being sent to the Graveyard, but even in this case the effect of Predator Plant Moray Nepenthes can be activated. (The destroyed D/D Savant Kepler is equipped to Predator Plant Moray Nepenthes normally.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19559&keyword=&tag=-1

Q: A Chiwen, Light of the Yang Zing that was Special Summoned by its own effect is destroyed by battle with a Predator Plant Moray Nepenthes. In this case, can the effect of Predator Plant Moray Nepenthes that equips the destroyed monster to it be activated?
A: In this scenario, a Chiwen, Light of the Yang Zing that was Special Summoned by its own effect and is destroyed by battle with Predator Plant Moray Nepenthes is banished instead of being sent to the Graveyard, but even in this case the effect of Predator Plant Moray Nepenthes can be activated. (The destroyed Chiwen, Light of the Yang Zing is equipped to Predator Plant Moray Nepenthes normally.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=6276&keyword=&tag=-1

Q: Predator Plant Moray Nepenthes is equipped with a Performapal Life Swordsman by its second effect. In this situation, can the third effect of Predator Plant Moray Nepenthes be activated by targeting the equipped Performapal Life Swordsman?
A: If Predator Plant Moray Nepenthes is equipped with a monster by its own effect, even if that monster has 0 ATK such as Performapal Life Swordsman, you can also activate the effect that destroys an equipped monster and increases your Life Points by its ATK. In this case, the equipped monster is destroyed normally, but you gain no Life Points.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19667&keyword=&tag=-1

Q: The first effect of Predator Plant Squid Drosera is activated and applied to my Starve Venom Fusion Dragon, so that it can attack all monsters on my opponent’s field with Predator Counters on them once each this turn. In this situation, if there is an XYZ-Dragon Cannon on my opponent’s field with a Predator Counter on it, and a VW-Tiger Catapult without Predator Counters on it, can Starve Venom Fusion Dragon attack both monsters?
A: If a monster that the effect of Predator Plant Squid Drosera has applied to first attacks a monster without a Predator Counters on it, it will not be able to attack any monsters that do have Predator Counters on them. Conversely, if that monster first attacks a monster with a Predator Counter on it, it will not be able to attack any monsters without Predator Counters on them. Therefore, in this scenario, Starve Venom Fusion Dragon cannot attack both XYZ-Dragon Cannon and VW-Tiger Catapult.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19585&keyword=&tag=-1

Q: If a face-down Defense Position Predator Plant Squid Drosera is destroyed by battle and sent to the Graveyard, will its effect that places a Predator Counter on each of my opponent’s Special Summoned monsters activate?
A: In this scenario, if a face-down Defense Position Predator Plant Squid Drosera is attacked, it is destroyed and sent to the Graveyard after being flipped face-up, so it is considered to leave the field while face-up. Therefore, the effect of Predator Plant Squid Drosera will activate.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19584&keyword=&tag=-1

Q: A Superheavy Samurai Scales and a Superheavy Samurai Swordsman on my field are both equipped with a Superheavy Samurai Soularbitrator. In this situation, can my opponent’s monsters attack?
A: In this scenario, if there are 2 monsters equipped with Superheavy Samurai Soularbitrator on your field, the effect of each copy will be applied, preventing your opponent’s monsters from attacking other monsters aside from the equipped monster, so neither Superheavy Samurai Scales nor Superheavy Samurai Swordsman can be attacked. Note that monsters such as Performapal Swincobra can still attack directly with their own effects.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19583&keyword=&tag=-1

Q: Cipher Twin Raptor and a Photon Token that was Special Summoned by the effect of Photon Sanctuary are both face-up on my field. In this situation, if Cipher Twin Raptor is destroyed by battle and sent to the Graveyard, and I activate the effect of a Cipher Mirror Knight by discarding it from my hand, can I choose the Photon Token when resolving the part of the effect that sends 1 card from my hand or field to the Graveyard?
A: When resolving the effect of Cipher Mirror Knight, you can choose a Photon Token as the card to send from your hand or field to the Graveyard. In this scenario, the chosen Photon Token disappears when it leaves the field and is not sent to the Graveyard, so the part of the effect that Special Summons the destroyed monster does not apply.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19700&keyword=&tag=-1

Q: Cipher Wing is face-up in my Monster Zone, and Performapal Cheermole is in my Pendulum Zone. In this situation, if Cipher Wing is destroyed by battle and sent to the Graveyard, and I activate the effect of a Cipher Mirror Knight by discarding it from my hand, can I choose Performapal Cheermole when resolving the part of the effect that sends 1 card from my hand or field to the Graveyard?
A: When resolving the effect of Cipher Mirror Knight, you can choose a Pendulum Monster on the field as the card to send from your hand or field to the Graveyard. In this scenario, the chosen Performapal Cheermole is placed face-up in the Extra Deck and is not sent to the Graveyard, so the part of the effect that Special Summons the destroyed monster does not apply.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19699&keyword=&tag=-1

Q: Can I Special Summon a Photon Thrasher from my hand with the effect of Crystron Quon?
A: Photon Thrasher is a Special Summon-only monster that must first be Special Summoned by its own procedure. Therefore, you cannot Special Summon Photon Thrasher with the effect of Crystron Quon. (If you do not have a non-Tuner monster other than Photon Thrasher in your hand to Special Summon, you cannot activate the effect of Crystron Quon.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19558&keyword=&tag=-1

Q: I activate the effect of Crystron Quon, and Special Summon a Beta the Electromagnet Warrior from my hand, then Synchro Summon a Crystron Quandum. Afterward, can I activate the effect of Beta the Electromagnet Warrior that adds a Level 4 or lower “Magnet Warrior” monster from my Deck to my hand?
A: The effect of Crystron Quon Special Summons a non-Tuner monster from your hand with its effects negated, and then immediately afterward performs a Synchro Summon using the Special Summoned monster. In this scenario, after Crystron Quandum is Synchro Summoned, the effect of Beta the Electromagnet Warrior can be activated, but it will be negated, so you cannot add a Level 4 or lower “Magnet Warrior” monster from your Deck to your hand.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19582&keyword=&tag=-1

Q: While the effect of Grisaille Prison is applying, can I activate the effect of Crystron Quon?
A: While the effect of Grisaille Prison is applying, the effect of Crystron Quon cannot be activated. Note that if Grisaille Prison is chained to the effect of Crystron Quon, the part of the effect that Special Summons a non-Tuner monster from your hand with its effects negated is applied normally, but afterward you cannot perform a Synchro Summon using the Special Summoned monster.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=14018&keyword=&tag=-1

Q: While the effect of Imperial Iron Wall is applying, can I activate the effect of Crystron Citri?
A: Even while the effect of Imperial Iron Wall is applying, you can activate the effect of Crystron Citri. The effect will Special Summon the targeted monster with its effects negated, and then perform a Synchro Summon of a Machine-Type monster using Crystron Citri and that monster as Synchro Materials. However, since the effect of Imperial Iron Wall is applying, the Synchro Material monsters are sent to the Graveyard instead of being banished.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=107&keyword=&tag=-1

Q: Can I Special Summon a Helpoemer from my Graveyard with the effect of Crystron Citri?
A: Helpoemer is a monster that cannot be Special Summoned from the Graveyard, so it cannot be targeted with the effect of Crystron Citri.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19557&keyword=&tag=-1

Q: I activate the effect of Crystron Citri, and Special Summon a Resonance Insect from my Graveyard, then Synchro Summon a Crystron Ametrix. Afterward, can I activate the effect of Resonance Insect that sends an Insect-Type monster from my Deck to the Graveyard?
A: The effect of Crystron Citri Special Summons the targeted non-Tuner monster from your Graveyard with its effects negated, and then immediately afterward performs a Synchro Summon using the Special Summoned monster. In this scenario, after Crystron Ametrix is Special Summoned, its effect that changes all Special Summoned monsters on your opponent’s field to Defense Position and the effect of Resonance Insect can both be activated in a Chain, in any order. The banished Resonance Insect will no longer have its effects negated by Crystron Citri, so you can send an Insect-Type monster from your Deck to your Graveyard normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19581&keyword=&tag=-1

Q: While I have 5 monsters on my field and no available Monster Zones, can I activate the first effect of Crystron Prasirator, Crystron Smoger, Crystron Thystvern, or Crystron Rosenix?
A: You can activate the effect of a monster such as Crystron Prasirator even if you already have 5 monsters on your field, but in that case you must target a face-up monster in your Monster Zone. (In this case, the effect of Crystron Prasirator, etc. cannot be activated targeting a face-up card in your Spell & Trap Zones, Field Zone, or Pendulum Zones.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19576&keyword=&tag=-1

Q: The first effect of Crystron Prasirator, Crystron Smoger, Crystron Thystvern, or Crystron Rosenix is activated, targeting a Guiding Ariadne in my Pendulum Zone. If my opponent chains Phoenix Wing Wind Blast, and returns Guiding Ariadne to my Deck, how does the effect resolve?
A: When resolving the effect of a monster such as Crystron Prasirator, if the targeted monster has left the field, since you cannot destroy it, you also cannot Special Summon a “Crystron” Tuner monster from your Deck. Note that the part of the effect that prevents you from Special Summoning from the Extra Deck, except Machine-Type Synchro Monsters, is still applied normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19580&keyword=&tag=-1

Q: The first effect of Crystron Prasirator, Crystron Smoger, Crystron Thystvern, or Crystron Rosenix is activated, targeting a face-up Raremetalfoes Bismagia on my field. If my opponent chains Book of Moon, and changes Raremetalfoes Bismagia to face-down Defense Position, how does the effect resolve?
A: When resolving the effect of a monster such as Crystron Prasirator, even if the targeted face-up card has been changed to face-down Defense Position, it is still destroyed. Furthermore, the part of the effect that Special Summons a “Crystron” Tuner monster is applied normally, and you also cannot Special Summon monsters from the Extra Deck for the rest of the turn, except Machine-Type Synchro Monsters.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19579&keyword=&tag=-1

Q: The first effect of Crystron Prasirator, Crystron Smoger, Crystron Thystvern, or Crystron Rosenix is activated, targeting a face-up The Fabled Kudabbi on my field. If I have no cards in my hand, so that The Fabled Kudabbi cannot be destroyed by battle or card effects, how does the effect resolve?
A: When resolving the effect of a monster such as Crystron Prasirator, if the targeted card cannot be destroyed, you also cannot Special Summon a “Crystron” Tuner monster from your Deck. Note that the part of the effect that prevents you from Special Summoning from the Extra Deck, except Machine-Type Synchro Monsters, is still applied normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19578&keyword=&tag=-1

Q: If I already Special Summoned a monster from my Extra Deck other than a Machine-Type Synchro Monster, can I activate the first effect of Crystron Prasirator, Crystron Smoger, Crystron Thystvern, or Crystron Rosenix?
A: Yes, you can. After the effect of Crystron Prasirator, etc. is activated, until the end of this turn, you cannot Special Summon any monsters from your Extra Deck, except Machine-Type Synchro Monsters.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19577&keyword=&tag=-1

Q: Necrovalley is face-up in my opponent’s Field Zone. In this situation, can I activate the effect of a Bahrstos Fuhrer, the True Dracoruler in my hand that Special Summons it?
A: Even while the effects of your opponent’s Necrovalley are applying, you can activate the first effect of Bahrstos Fuhrer, the True Dracoruler in your hand. (The effect of Bahrstos Fuhrer, the True Dracoruler will never be negated by Necrovalley.) Note that if you destroyed 2 WATER monsters with this effect, if you choose to apply the additional effect that banishes up to 2 of your opponent’s Spell/Trap Cards, you cannot banish any Spell/Trap Cards from your opponent’s Graveyard. You must banish up to 2 Spell/Trap Cards on your opponent’s field instead.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=6399&keyword=&tag=-1

Q: Thunder King Rai-Oh is face-up on my opponent’s field. In this situation, if a Raremetalfoes Bismagia on my field is destroyed by battle or card effect, can I activate its monster effect?
A: In this scenario, if Raremetalfoes Bismagia is destroyed by battle or card effect while the effect of Thunder King Rai-Oh is applying, the effect of Raremetalfoes Bismagia can be activated. When applying the effect during the End Phase of that turn, if the effect of Thunder King Rai-Oh is still applying, you cannot add a “Metalfoes” monster from your Deck to your hand.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19575&keyword=&tag=-1

Q: If there are no Gemini monsters in my Graveyard, can I activate the effect of Chembination Beast Hydron Hawk by discarding a Gemini monster such as Chembination Beast Carbon Crab?
A: If there are no Gemini monsters in your Graveyard, since there are no monsters to target with the effect of Chembination Beast Hydron Hawk, the effect cannot be activated. Note that if you already have a Gemini monster in your Graveyard, if you activate the effect of Chembination Beast Hydron Hawk by discarding a Gemini monster such as Chembination Beast Carbon Crab, you can also target that Gemini monster that was discarded as the cost.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19574&keyword=&tag=-1

Q: While the effect of Macro Cosmos is applying, if the effect of Chembination Beast Carbon Crab is activated, how does it resolve?
A: In this scenario, when resolving the effect of Chembination Beast Carbon Crab, the Gemini monster that you select to send to the Graveyard is banished instead. In that case, the part of the effect that adds a Gemini monster from your Deck to your hand does not apply, and the effect finishes resolving. (If Macro Cosmos is chained to the effect of Chembination Beast Carbon Crab, the result is the same.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19572&keyword=&tag=-1

Q: While the effect of Mistake is applying, can the effect of Chembination Beast Carbon Crab be activated? Also, if the effect of Chembination Beast Carbon Crab is activated, but Mistake is chained to it, how does the effect resolve?
A: While the effect of Mistake is applying, the effect of Chembination Beast Carbon Crab cannot be activated. If Mistake is chained to the effect of Chembination Beast Carbon Crab, the part of the effect that sends a Gemini monster from your Deck to the Graveyard is applied normally, but you cannot add another Gemini monster from your Deck to your hand. (In this case, after sending the Gemini monster from your Deck to the Graveyard, the effect finishes resolving.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19571&keyword=&tag=-1

Q: If I only have 1 Gemini monster in my Deck, can I activate the effect of Chembination Beast Carbon Crab?
A: If you cannot apply both parts of the effect of Chembination Beast Carbon Crab, you cannot activate it. Therefore, if you only have 1 Gemini monster in your Deck, you cannot activate the effect of Chembination Beast Carbon Crab.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19573&keyword=&tag=-1

Q: Can a Gemini Soldier in my hand be Special Summoned by the effect of Chembination Beast Oxyn Ox?
A: The effect of Chembination Beast Oxyn Ox is able to Special Summon a Gemini monster such as Gemini Soldier that has the same Level as Chembination Beast Oxyn Ox. In this case, any Gemini monsters on your field with different Levels become Level 2 until the end of this turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19570&keyword=&tag=-1

Q: An Archembination Beast Hydragon is Special Summoned from the hand by the effect of Chembination Beast Oxyn Ox, and all Gemini monsters on my field become Level 8. In this situation, if Skill Drain is activated, what happens to their Levels?
A: If the effect of Chembination Beast Oxyn Ox is applied, and the Levels of all Gemini monsters on your field are changed, even if Skill Drain is activated and the effects of Chembination Beast Oxyn Ox are negated, the applied effect will not be negated. The changed Level (in this case, Level 8) will remain until the end of the turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19556&keyword=&tag=-1

Q: While the effect of my Archembination Beast Dioxin is applying, can the Normal Summons of Gemini monsters that are being Summoned again while face-up on the field be negated?
A: The effect of Archembination Beast Dioxin prevents the Normal Summons of Gemini monsters from being negated, not just from the hand but also when they are Summoned again while face-up on the field.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19569&keyword=&tag=-1

Q: While the effect of my Archembination Beast Dioxin is applying, can the Normal Summons of my opponent’s Gemini monsters be negated?
A: The effect of Archembination Beast Dioxin also applies to Gemini monsters that your opponent Normal Summons, not just your own, and you will not be able to negate their Normal Summons.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19555&keyword=&tag=-1

Q: An Archembination Beast Hydragon that has been Normal Summoned again as an Effect Monster is face-up on my field. In this situation, when I Normal Summon a Chembination Beast Hydron Hawk from my hand, I activate the effect of Archembination Beast Hydragon that increases its ATK and DEF by 500. Afterward, if Chembination Beast Hydron Hawk is Normal Summoned again while face-up on the field, can the effect of Archembination Beast Hydragon be activated again?
A: The effect of Archembination Beast Hydragon can be activated when a Gemini monster is Normal Summoned successfully, not just from the hand but also when they are Summoned again while face-up on the field. In this scenario, when Chembination Beast Hydron Hawk is Normal Summoned from your hand, the effect of Archembination Beast Hydragon increases its ATK and DEF by 500, so its ATK becomes 1900 and its DEF becomes 1200. Since this increase is applied as long as the affected Gemini monster is face-up on the field, when Chembination Beast Hydron Hawk is Normal Summoned again as an Effect Monster, and the effect of Archembination Beast Hydragon is activated again, the ATK and DEF of Chembination Beast Hydron Hawk become 2400 and 1700, respectively.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19666&keyword=&tag=-1

Q: An Archembination Beast Dioxin and an Archembination Beast Hydragon that has been Normal Summoned again as an Effect Monster is face-up on my field. If my opponent activates Dark Hole, can I apply the second effect of Archembination Beast Hydragon?
A: In this scenario, even if 2 or more Gemini monsters on your field would be destroyed at the same time, you can apply the effect of Archembination Beast Hydragon. If you choose to destroy 1 other card on your field instead, neither Archembination Beast Dioxin nor Archembination Beast Hydragon are destroyed by the effect of Dark Hole.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19568&keyword=&tag=-1

Q: How does the second effect of PSY-Frame Multi-Threader work?
A: When a “PSY-Frame” monster on your field would be destroyed by battle, if you want to apply the effect of PSY-Frame Multi-Threader in your hand, you can choose to do so during damage calculation, but PSY-Frame Multi-Threader will be discarded immediately after damage calculation. Also, when a face-up “PSY-Frame” card on your field would be destroyed by a card effect such as Coral Dragon or Raigeki Break, and you want to apply the effect of PSY-Frame Multi-Threader in your hand, you can choose to do so while resolving the card effect that would destroy your “PSY-Frame” card and immediately discard it.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19665&keyword=&tag=-1

Q: If I do not have any Aqua-Type monsters in my hand, can I activate the first effect of Graydle Slime Jr.?
A: The effect of Graydle Slime Jr. that activates when it is Normal Summoned targets 1 Aqua-Type monster in your Graveyard. Since you can decide not to apply the part of the effect that Special Summons an Aqua-Type monster from your hand with the same Level, you can activate this effect even if you do not have an Aqua-Type monster in your hand.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19567&keyword=&tag=-1

Q: A Legendary Ocean is face-up in my Field Zone. In this situation, I activate the first effect of Graydle Slime Jr. by targeting a Graydle Dragon in my Graveyard. In this case, if I want to Special Summon an Aqua-Type monster from my hand, what Level monster can I Special Summon?
A: In this scenario, the Graydle Dragon that is Special Summoned from the Graveyard is Level 8, but its Level is reduced to 7 by the effect of A Legendary Ocean. In this case, if you want to Special Summon an Aqua-Type monster from your hand with the same Level, you will Special Summon a Level 7 monster. Note that since the effect of A Legendary Ocean also reduces the Levels of WATER monsters in your hand by 1, you could Special Summon an Aqua-Type WATER monster such as Mobius the Mega Monarch treated as Level 7 in this case.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19566&keyword=&tag=-1

Q: I activate the effect of Aromaseraphy Angelica by discarding it from my hand, targeting an Aromaseraphy Rosemary in my Graveyard. If my opponent chains the effect of D.D. Crow, and banishes the targeted Aromaseraphy Rosemary from my Graveyard, how does the effect of Aromaseraphy Angelica resolve?
A: When resolving the first effect of Aromaseraphy Angelica, if the targeted monster is no longer in your Graveyard, you do not gain any Life Points.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19664&keyword=&tag=-1

Q: I activate the effect of Aromaseraphy Angelica that Special Summons it from the Graveyard. If my opponent chains Compulsory Evacuation Device, and my Aromage Bergamot is returned to my hand so that I no longer have an “Aroma” monster on my field, how does the effect of Aromaseraphy Angelica resolve?
A: In this scenario, when resolving the effect of Aromaseraphy Angelica, even if you do not have an “Aroma” monster on your field, Aromaseraphy Angelica is Special Summoned normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19663&keyword=&tag=-1

Q: I activate the effect of Aromaseraphy Angelica that Special Summons it from the Graveyard. If my opponent chains Aegis of Gaia, and their Life Points become higher than mine, how does the effect of Aromaseraphy Angelica resolve?
A: In this scenario, when resolving the effect of Aromaseraphy Angelica, even if your Life Points are not higher than your opponent’s, Aromaseraphy Angelica is Special Summoned normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19662&keyword=&tag=-1

Q: Macro Cosmos is face-up on my opponent’s field. If I activate the effect of Dokidoki by discarding Muka Muka, how does it resolve?
A: Even while the effect of Macro Cosmos is applying, you can activate the effect of Dokidoki. In that case, the Rock-Type monster that you discard is banished instead of being sent to the Graveyard, but the effect will resolve normally. (In this example, you will Special Summon a Level 2 EARTH Rock-Type monster from your Deck.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19564&keyword=&tag=-1

Q: I activate the effect of Dokidoki by discarding a Triamid Master. If my opponent chains the effect of their D.D. Crow, banishing the discarded Triamid Master, how does the effect of Dokidoki resolve?
A: When resolving the effect of Dokidoki, even if the discarded Rock-Type monster is not in the Graveyard, the effect is applied normally. (In this example, you will Special Summon a Level 4 EARTH Rock-Type monster from your Deck.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19565&keyword=&tag=-1

Q: Can the effect of Torque Tune Gear that equips it to another monster be activated by targeting an Xyz Monster such as Gear Gigant X?
A: Yes, it can. In this scenario, if Gear Gigant X is equipped with Torque Tune Gear, it will gain 500 ATK and DEF, and if it would be destroyed by battle or card effect, Torque Tune Gear is destroyed instead. Note that Gear Gigant X will also be treated as a Tuner monster, but it cannot be used for a Synchro Summon since it does not have a Level.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19697&keyword=&tag=-1

Q: Can the effect of Torque Tune Gear that equips it to another monster be activated by targeting a Tuner monster such as Genex Controller?
A: Yes, it can. In this scenario, Genex Controller is already a Tuner monster, but if it is equipped with Torque Tune Gear, it will gain 500 ATK and DEF, and if it would be destroyed by battle or card effect, Torque Tune Gear is destroyed instead.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19698&keyword=&tag=-1

Q: Relinquished is equipped with an opponent’s Torque Tune Gear by its own effect. In this case, while Relinquished is equipped with Torque Tuner Gear, is it treated as a Tuner monster?
A: The effects of Torque Tune Gear that apply while it is equipped to a monster will be applied whether it is equipped by its own effect or another card’s, such as Relinquished. Therefore, in this scenario, Relinquished is treated as a Tuner monster while it remains equipped with Torque Tune Gear.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19661&keyword=&tag=-1

Q: I activate the Pendulum Effect of my Pandora’s Treasure Box, placing it in my opponent’s Pendulum Zone. Afterward, if Pandora’s Treasure Box is destroyed by my opponent’s Mystical Space Typhoon while in my opponent’s Pendulum Zone, what happens to it?
A: If Pandora’s Treasure Box is placed in your opponent’s Pendulum Zone by its own effect, and then destroyed by Mystical Space Typhoon, it will be placed face-up in its owner’s (yours in this example) Extra Deck.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19696&keyword=&tag=-1

Q: I activate the Pendulum Effect of my Pandora’s Treasure Box, targeting a Qliphort Scout in my opponent’s Pendulum Zone. If Mystical Space Typhoon is chained, and Qliphort Scout is destroyed, how does the effect of Pandora’s Treasure Box resolve?
A: In this scenario, if the targeted Qliphort Scout is destroyed by the chained Mystical Space Typhoon, it cannot be destroyed by the effect of Pandora’s Treasure Box, and the part of the effect that places Pandora’s Treasure Box in your opponent’s Pendulum Zone is also not applied. Pandora’s Treasure Box will remain in your own Pendulum Zone.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19563&keyword=&tag=-1

Q: When my opponent activates Pot of Duality, I chain the second effect of Fairy Tail – Talia that makes the effect become “Change 1 face-up monster your opponent controls to face-down Defense Position.” During this turn, will my opponent be able to Special Summon?
A: In this scenario, the effect of Pot of Duality is changed by the effect of Fairy Tail – Talia, however the restriction against being able to Special Summon during the turn Pot of Duality is activated is not part of its effect, and will still be applied normally. Therefore, your opponent cannot Special Summon that turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19695&keyword=&tag=-1

Q: During my Main Phase 2, I activate Machine Angel Ritual and Ritual Summon a Cyber Angel – Vishnu. In this case, can I still activate the effect of Cyber Angel – Vishnu when it is successfully Ritual Summoned?
A: Even if you Ritual Summon Cyber Angel – Vishnu during your Main Phase 2, as long as there are monsters on your opponent’s field that were Special Summoned from the Extra Deck, you can activate its effect. The effect will destroy those monsters and inflict damage to your opponent normally, but since the Battle Phase has already ended, the effect that allows Cyber Angel – Vishnu to attack twice this turn is not applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19694&keyword=&tag=-1

Q: A Frightfur Wolf that was Special Summoned from the Extra Deck is face-up on my opponent’s field. In this situation, I Ritual Summon Cyber Angel – Vishnu and activate its first effect. If my opponent chains Book of Moon, and changes Cyber Angel – Vishnu to face-down Defense Position, how does its effect resolve?
A: When resolving the effect of Cyber Angel – Vishnu, even if it is in face-down Defense Position, the effect is applied normally. As long as Frightfur Wolf was destroyed and damage was inflicted by this effect, the part of the effect that allows Cyber Angel – Vishnu to attack twice per Battle Phase this turn is also applied, so that if it is changed to face-up Attack Position again by an effect like Book of Taiyou, Cyber Angel – Vishnu can attack twice this turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19562&keyword=&tag=-1

Q: A Psychic Lifetrancer that was Special Summoned from the Extra Deck is face-up on my opponent’s field. In this situation, I Ritual Summon Cyber Angel – Vishnu and activate its first effect. If my opponent chains the effect of Hanewata, so that they take no effect damage this turn, what happens?
A: In this scenario, your opponent’s Psychic Lifetrancer is destroyed by the effect of Cyber Angel – Vishnu, but the effect of Hanewata makes the effect damage become 0. In this case, the effect that allows Cyber Angel – Vishnu to attack twice this turn is not applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19693&keyword=&tag=-1

Q: I Ritual Summon Cyber Angel – Vishnu and activate its first effect. After the effect is applied, if my opponent activates Book of Moon, and that Cyber Angel – Vishnu is changed to face-down Defense Position, what happens to its applied effect?
A: After the effect of Cyber Angel – Vishnu allowing it to attack twice during each Battle Phase this turn is applied, if it is then changed to face-down Defense Position, the effect disappears. If Cyber Angel – Vishnu is changed to face-up Attack Position again by an effect like Book of Taiyou, it will only be able to attack once normally this turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=6418&keyword=&tag=-1

Q: Necrovalley is face-up in my opponent’s Field Zone. In this situation, if my opponent activates Raigeki Break, but I chain the second effect of Cyber Angel – Vishnu that negates the activation of a card/effect that destroys another card on the field, what happens?
A: When activating the second effect of Cyber Angel – Vishnu, you must return a Ritual Monster in your Graveyard to your Deck as the cost. Since this is not treated as part of its effect, the effect is not negated by Necrovalley, and will be applied normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19554&keyword=&tag=-1

Q: If my opponent activates Icarus Attack, can I chain the effect of Sauravus, the Crowned Ancient Sage by discarding it from my hand?
A: In this scenario, if your opponent activates Icarus Attack, as long as a monster(s) on your field is included as a target, you can activate the effect of Sauravus, the Crowned Ancient Sage by discarding it from my hand, to negate the activation.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19692&keyword=&tag=-1

Q: My opponent attempts to Pendulum Summon Luster Pendulum, the Dracoslayer and Vector Pendulum, the Dracoverlord. At this time, if I activate the second effect of Sauravus, the Crowned Ancient Sage that negates Special Summons, but my opponent chains Imperial Iron Wall, what happens to the monsters being Special Summoned?
A: In this scenario, even if the effect of Imperial Iron Wall is applying, the effect of Sauravus, the Crowned Ancient Sage is resolved. In this case, the Special Summon on the monsters is negated, but since those monsters cannot be banished, Luster Pendulum, the Dracoslayer and Vector Pendulum, the Dracoverlord are sent to the Graveyard. Note that if the effect of Imperial Iron Wall is already applying, you cannot activate the second effect of Sauravus, the Crowned Ancient Sage.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19691&keyword=&tag=-1

Q: Can Starve Venom Fusion Dragon be Fusion Summoned by the effect of Super Polymerization?
A: The Fusion Material monsters required to Fusion Summon Starve Venom Fusion Dragon are 2 DARK monsters on the field, except Tokens. You can choose Fusion Material monsters on either player’s side of the field to Fusion Summon Starve Venom Fusion Dragon with the effect of Super Polymerization.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19687&keyword=&tag=-1

Q: Can Starve Venom Fusion Dragon be Fusion Summoned by the effect of Dragon’s Mirror?
A: The Fusion Material monsters required to Fusion Summon Starve Venom Fusion Dragon are 2 DARK monsters on the field, except Tokens. Therefore, if you want to Fusion Summon Starve Venom Fusion Dragon with the effect of Dragon’s Mirror, you must use Fusion Materials on your side of the field. (You cannot use monsters in your Graveyard for the Fusion Summon.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19690&keyword=&tag=-1

Q: Can Starve Venom Fusion Dragon be Fusion Summoned by the effect of Odd-Eyes Fusion?
A: The Fusion Material monsters required to Fusion Summon Starve Venom Fusion Dragon are 2 DARK monsters on the field, except Tokens. Therefore, if you want to Fusion Summon Starve Venom Fusion Dragon with the effect of Odd-Eyes Fusion, you must use Fusion Materials on your side of the field. (You cannot use monsters in your hand or Extra Deck for the Fusion Summon.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19689&keyword=&tag=-1

Q: When Fusion Summoning a Starve Venom Fusion Dragon with the effect of Polymerization, can I apply the effect of Chain Material?
A: The Fusion Material monsters required to Fusion Summon Starve Venom Fusion Dragon are 2 DARK monsters on the field, except Tokens. Therefore, even if you apply the effect of Chain Material when Fusion Summoning Starve Venom Fusion Dragon, you must use Fusion Materials on your side of the field. (You cannot use monsters in your hand, Deck, or Graveyard for the Fusion Summon.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19688&keyword=&tag=-1

Q: A Gorz the Emissary of Darkness and an Emissary of Darkness Token with 3000 ATK that was Special Summoned by its effect are both face-up on my opponent’s field. In this case, if I Fusion Summon a Starve Venom Fusion Dragon and activate its effect that increases its ATK, and I choose the Emissary of Darkness Token as my opponent’s Special Summoned monster, how much ATK will Starve Venom Fusion Dragon gain?
A: When you activate the effect of Starve Venom Fusion Dragon that increases its ATK, the ATK it gains when the effect resolves will be equal to the current ATK of the chosen monster. Therefore, in this scenario, if you choose your opponent’s Emissary of Darkness Token, Starve Venom Fusion Dragon will gain 3000 ATK until the end of this turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19561&keyword=&tag=-1

Q: When Starve Venom Fusion Dragon is Fusion Summoned, Endless Trap Hole is activated, and changes it to face-down Defense Position. Afterward, if Starve Venom Fusion Dragon is destroyed by battle or card effects, can its effect that destroys all Special Summoned monsters on my opponent’s field be activated?
A: After it is successfully Fusion Summoned, changed to face-down Defense Position, and then destroyed by battle or card effect, Starve Venom Fusion Dragon is still treated as a Fusion Summoned monster being destroyed, so you can activate its third effect.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19553&keyword=&tag=-1

Q: Can Fullmetalfoes Alcahest be equipped with 2 or more monsters by its own effect?
A: If a Fullmetalfoes Alcahest is equipped with a monster by its own effect during your opponent’s turn, when you reach your opponent’s next turn you can activate the effect that equips a monster to it once again. Note that if Fullmetalfoes Alcahest is equipped with 2 or more monsters at once, it will gain DEF equal to the total ATK of all the equipped monsters.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19551&keyword=&tag=-1

Q: I activate the effect of Fullmetalfoes Alcahest, targeting an Agnimazd Vanisher, the True Dracoruler on my opponent’s field. If my opponent chains Book of Moon, and changes Agnimazd Vanisher, the True Dracoruler to face-down Defense Position, how does the effect of Fullmetalfoes Alcahest resolve?
A: When resolving the effect of Fullmetalfoes Alcahest, if the targeted monster is in face-down Defense Position, it is not equipped. (The targeted monster will remain on the field in face-down Defense Position.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19552&keyword=&tag=-1

Q: I activate the first effect of Fullmetalfoes Alcahest, targeting a Bahrstos Fuhrer, the True Dracoruler on my opponent’s field. If Book of Moon is chained, and Fullmetalfoes Alcahest is changed to face-down Defense Position, how does its effect resolve?
A: When resolving the effect of Fullmetalfoes Alcahest, if Fullmetalfoes Alcahest is in face-down Defense Position, the targeted monster (which in this scenario is Bahrstos Fuhrer, the True Dracoruler) cannot be equipped, so it is sent to the Graveyard.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=6214&keyword=&tag=-1

Q: Torque Tune Gear has been equipped by its own effect to a Fullmetalfoes Alcahest. In this situation, if I activate Metalfoes Fusion, can I apply the last effect of Fullmetalfoes Alcahest and use the equipped Torque Tune Gear as a Fusion Material?
A: The effect of Fullmetalfoes Alcahest that allows you to use monsters equipped to is as Fusion Material for Fusion Summons is applied for not just monsters equipped to it by its own effect, but also by their own effects such as that of Torque Tune Gear. In this example, when resolving Metalfoes Fusion, you can use Fullmetalfoes Alcahest and the equipped Torque Tune Gear as Fusion Materials for Metalfoes Adamante.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19549&keyword=&tag=-1

Q: My Fullmetalfoes Alcahest is equipped with both Metalfoes Mythriel and Metalfoes Orihulk by its own effect. In this situation, if I activate Fullmetalfoes Fusion, can I apply the last effect of Fullmetalfoes Alcahest and use both equipped monsters as Fusion Materials?
A: When applying the effect of Fullmetalfoes Alcahest and using monsters equipped to it as Fusion Materials, you may perform the Fusion Summon using only those equipped monsters. In this example, when resolving Fullmetalfoes Fusion, you can use Metalfoes Mythriel and Metalfoes Orihulk to Fusion Summon another Metalfoes Orihulk.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19548&keyword=&tag=-1

Q: An Archembination Beast Dioxin that has been Normal Summoned again as an Effect Monster is face-up on my field. In this situation, if I activate the effect of Fullmetalfoes Alcahest and equip my opponent’s Archembination Beast Dioxin to it, and then apply the effect of Fullmetalfoes Alcahest to use the equipped monster for a Fusion Summon, can I treat Archembination Beast Dioxin as a Normal Monster for the Fusion Summon?
A: If Fullmetalfoes Alcahest is equipped with a Gemini monster, when performing a Fusion Summon by using that equipped monster, you cannot treat it as a Normal Monster. For example, if you activate Metalfoes Fusion in this situation, you could not use Fullmetalfoes Alcahest and the equipped Archembination Beast Dioxin to Fusion Summon another Fullmetalfoes Alcahest. You could however use Fullmetalfoes Alcahest and the equipped Archembination Beast Dioxin to Fusion Summon Metalfoes Adamante.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19547&keyword=&tag=-1

Q: Can I activate the effect of Fullmetalfoes Alcahest that equips an opponent’s monster to it by targeting The Phantom Knights of Dark Gauntlets on my opponent’s field that was Special Summoned as a monster by its own effect?
A: You can activate the effect of Fullmetalfoes Alcahest by targeting The Phantom Knights of Dark Gauntlets treated as a monster. In that case, the second effect of Fullmetalfoes Alcahest will increase its DEF by the ATK of The Phantom Knights of Dark Gauntlets, which is 300. Note that if you apply the third effect of Fullmetalfoes Alcahest to use monsters equipped to it for a Fusion Summon, you cannot use The Phantom Knights of Dark Gauntlets equipped to it.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19550&keyword=&tag=-1

Q: Fullmetalfoes Alcahest is face-up on my opponent’s field, equipped with Raremetalfoes Bismagia. In this situation, if I activate Super Polymerization, can I use Fullmetalfoes Alcahest and the equipped Raremetalfoes Bismagia as Fusion Materials?
A: The last effect of Fullmetalfoes Alcahest allows its controller to use monsters equipped to it in their Spell & Trap Zone as Fusion Materials for the Fusion Summon of a “Metalfoes” monster. In this scenario, both Fullmetalfoes Alcahest and the equipped Raremetalfoes Bismagia are controlled by your opponent. If you activate Super Polymerization, you can use your opponent’s Fullmetalfoes Alcahest as Fusion Material, but you cannot use the equipped Raremetalfoes Bismagia.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=6229&keyword=&tag=-1

Q: Fullmetalfoes Alcahest is face-up on my opponent’s field, equipped with Raremetalfoes Bismagia. In this situation, I activate Mind Control and take control of Fullmetalfoes Alcahest. Now, if I activate Metalfoes Fusion, can I use the equipped Raremetalfoes Bismagia as Fusion Material? Also, if my opponent activates Fullmetalfoes Fusion, can they use the equipped Raremetalfoes Bismagia as Fusion Material?
A: The last effect of Fullmetalfoes Alcahest allows its controller to use monsters equipped to it in their Spell & Trap Zone as Fusion Materials for the Fusion Summon of a “Metalfoes” monster. In this scenario, although you control Fullmetalfoes Alcahest, your opponent still controls the equipped Raremetalfoes Bismagia. Therefore, neither you nor your opponent can use the equipped Raremetalfoes Bismagia as a Fusion Material monster.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=4482&keyword=&tag=-1

Q: When activating the first effect of Metalfoes Mythriel, can I target a Fusion Monster in my Graveyard such as Metalfoes Cardinal?
A: When you activate the first effect of Metalfoes Mythriel, you can target a Fusion Monster in your Graveyard such as Metalfoes Cardinal. In that case, that monster is returned to your Extra Deck, and the target on the field is returned to the hand normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19545&keyword=&tag=-1

Q: I activate the first effect of Metalfoes Mythriel, targeting a Metalfoes Counter and Metalfoes Combination in my Graveyard, and a Bahrstos Fuhrer, the True Dracoruler on my opponent’s field. If the effect of D.D. Crow is chained, and that Metalfoes Counter is banished, how does the effect of Metalfoes Mythriel resolve?
A: When resolving the effect of Metalfoes Mythriel, if one of the 2 targeted cards is no longer in the Graveyard, the remaining target in the Graveyard is still returned to the Deck, and the target on the field is returned to the hand. (In this example, Metalfoes Combination returns to the Deck, and Bahrstos Fuhrer, the True Dracoruler returns to the hand.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19546&keyword=&tag=-1

Q: I activate the first effect of Metalfoes Mythriel, targeting a Fullmetalfoes Fusion and Raremetalfoes Bismagia in my Graveyard, and an Evilswarm Thunderbird on my opponent’s field. If my opponent activates the effect of the targeted Evilswarm Thunderbird that banishes it from the field, how does the effect of Metalfoes Mythriel resolve?
A: When resolving the effect of Metalfoes Mythriel, even if the targeted card on the field has left the field, the 2 targeted cards in the Graveyard are still returned to the Deck. (In this example, Fullmetalfoes Fusion and Raremetalfoes Bismagia return to the Deck.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19544&keyword=&tag=-1

Q: After the second effect of Cardian – Inoshicacho is activated and resolved, if Cardian – Inoshicacho is destroyed and sent to the Graveyard, will its effect continue to apply?
A: After the effect of Cardian – Inoshicacho has been applied, even if that Cardian – Inoshicacho leaves the field, its effect will remain until the end of your opponent’s turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19542&keyword=&tag=-1

Q: While the second effect of my Cardian – Inoshicacho is applying, can my opponent activate Monster Reborn?
A: While the second effect of your Cardian – Inoshicacho is applying, your opponent cannot activate cards or effects that Special Summon monsters from the Graveyard, including Monster Reborn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19543&keyword=&tag=-1

Q: While the second effect of my Cardian – Inoshicacho is applying, can either player activate The Shallow Grave?
A: Even while the second effect of your Cardian – Inoshicacho is applying, you can activate The Shallow Grave. In this case, both players will still target a monster from their own Graveyards, but the monster your opponent targets is not Special Summoned, and only your targeted monster is Special Summoned. Also, while the second effect of your Cardian – Inoshicacho is applying, your opponent cannot activate The Shallow Grave.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=212&keyword=&tag=-1

Q: My opponent activates Soul Charge, targeting an Agnimazd Vanisher, the True Dracoruler and a Bahrstos Fuhrer, the True Dracoruler in their Graveyard. I chain the effect of Crystron Quon, and as a result, Crystron Ametrix is Synchro Summoned. Afterward, can I activate the effect of Crystron Ametrix that changes all Special Summoned monsters on my opponent’s field to Defense Position?
A: The effect of Crystron Ametrix that changes all Special Summoned monsters on your opponent’s field to Defense Position can be activated even if it is Synchro Summoned during your opponent’s turn, and even if it was Synchro Summoned at Chain Link 2 or more. Therefore, in this scenario, if there are any Attack Position monsters on your opponent’s field after Soul Charge resolves, you can activate the effect of Crystron Ametrix. (In this example, if Agnimazd Vanisher, the True Dracoruler and a Bahrstos Fuhrer, the True Dracoruler were Special Summoned in Attack Position, the effect of Crystron Ametrix will change both of them to Defense Position.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19630&keyword=&tag=-1

Q: Necrovalley is face-up in my opponent’s Field Zone. In this case, if I successfully Synchro Summon a Crystron Phoenixion, can I activate its effect that banishes all Spell/Trap Cards on my opponent’s field and Graveyard?
A: In this scenario, while the effect of Necrovalley is applying, if there are any Spell/Trap Cards in your opponent’s Graveyard, you cannot activate the effect of Crystron Phoenixion when it is Synchro Summoned. Note that if there aren’t any Spell/Trap Cards in your opponent’s Graveyard when you Synchro Summon Crystron Phoenixion, you can activate its effect normally. (Necrovalley will also be banished.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19660&keyword=&tag=-1

Q: Multiple Spell/Trap Cards such as Monster Reborn and Torrential Tribute are present in my opponent’s Graveyard, and there is 1 Set Spell/Trap Card on my opponent’s field. If I activate the first effect of Crystron Phoenixion when it is Synchro Summoned, but my opponent chains Call of the Haunted and Special Summons Kycoo the Ghost Destroyer, what happens?
A: In this scenario, even while the effect of your opponent’s Kycoo the Ghost Destroyer is applying, the effect of Crystron Phoenixion is resolved. In this case, the cards in your opponent’s Graveyard such as Monster Reborn and Torrential Tribute are not banished, but the Call of the Haunted in your opponent’s Spell & Trap Zone is banished. (Since Call of the Haunted leaves the field, Kycoo the Ghost Destroyer is immediately destroyed.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19659&keyword=&tag=-1

Q: There are 2 copies of Aromaseraphy Rosemary face-up on my field. If I activate the first effect of Aromaseraphy Angelica and gain Life Points, can I activate the effect of each Aromaseraphy Rosemary that negates the effects of an opponent’s card?
A: The effect of Aromaseraphy Rosemary activates once the effect that increases your Life Points finishes resolving. (It is not chained to such an effect.) If there are 2 copies of Aromaseraphy Rosemary on your field, when you gain Life Points, you can activate the effect of each copy in a Chain, and resolve them normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19540&keyword=&tag=-1

Q: I activate the effect of Aromaseraphy Rosemary that negates the effects of an opponent’s card, targeting my opponent’s Rescue Rabbit. This turn, if my opponent activates the effect of Rescue Rabbit by banishing it, will it be negated?
A: If a monster’s effects are negated by the effect of Aromaseraphy Rosemary, any effect that activates or applies on the field is negated. Since the effect of Rescue Rabbit is a monster effect activated on the field by banishing it, the effect is negated, and no monsters are Special Summoned.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19541&keyword=&tag=-1

Q: Can I activate the effect of Wangtianhou, Origin of the Yang Zing that adds a “Yang Zing” card from my Deck to my hand even if it is Special Summoned other than by Synchro Summon?
A: The first effect of Wangtianhou, Origin of the Yang Zing can be activated when it is Special Summoned, not just by Synchro Summon but also by other ways such as the effect of Monster Reborn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19629&keyword=&tag=-1

Q: I activate the second effect of Wangtianhou, Origin of the Yang Zing by sending a Chiwen, Light of the Yang Zing from my Deck to my Graveyard. If my opponent chains the effect of D.D. Crow, banishing the sent Chiwen, Light of the Yang Zing, how does the effect of Wangtianhou, Origin of the Yang Zing resolve?
A: When you activate the second effect of Wangtianhou, Origin of the Yang Zing, even if the Wyrm-Type monster you sent to the Graveyard as the cost is no longer there when resolving the effect, the Level of Wangtianhou, Origin of the Yang Zing will be changed normally. (In this scenario, Wangtianhou, Origin of the Yang Zing becomes Level 1.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19539&keyword=&tag=-1

Q: A Galaxy Knight whose ATK is 0 due to the effect of Galaxy Zero is face-up on my opponent’s field. Can I activate the first effect of Dark Requiem Xyz Dragon by targeting that Galaxy Knight?
A: In this scenario, since that monster’s ATK is 0, the effect of Dark Requiem Xyz Dragon could not be applied, so it cannot be activated.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19658&keyword=&tag=-1

Q: I activate the first effect of Dark Requiem Xyz Dragon, targeting a face-up Starve Venom Fusion Dragon on my opponent’s field. If Book of Moon is chained, and Starve Venom Fusion Dragon is changed to face-down Defense Position, how does the effect of Dark Requiem Xyz Dragon resolve?
A: When resolving the first effect of Dark Requiem Xyz Dragon, if the targeted monster is in face-down Defense Positions, its ATK cannot become 0, so Dark Requiem Xyz Dragon does not gain any ATK. (In this scenario, the ATK of Dark Requiem Xyz Dragon remains 3000.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=6293&keyword=&tag=-1

Q: I activate the first effect of Dark Requiem Xyz Dragon, targeting a Dragon Core Accursed on my opponent’s field, and the ATK of Dark Requiem Xyz Dragon is increased by 2300 ATK as a result, becoming 5300. If my opponent then activates Skill Drain, and the effects of Dark Requiem Xyz Dragon are negated, what happens to the ATKs of Dark Requiem Xyz Dragon and Dragon Core Accursed?
A: After the first effect of Dark Requiem Xyz Dragon has been applied, even if Skill Drain is activated, the targeted monster’s ATK will remain 0, and the ATK of Dark Requiem Xyz Dragon will remain increased. (In this example, the ATK of Dragon Core Accursed remains 0, and the ATK of Dark Requiem Xyz Dragon remains 5300.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19657&keyword=&tag=-1

Q: A Dark Requiem Xyz Dragon with Dark Rebellion Xyz Dragon as its Xyz Material is face-up on my field. Even if I do not have any Xyz Monsters in my Graveyard, can I activate the second effect of Dark Requiem Xyz Dragon?
A: Even if you have no Xyz Monsters in your Graveyard, you can activate the second effect of Dark Requiem Xyz Dragon that negates the activation of an opponent’s monster effect. In this scenario, since you can activate the effect by detaching Dark Rebellion Xyz Dragon, you can then Special Summon it from the Graveyard after you negate the activation of the opponent’s monster effect.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19654&keyword=&tag=-1

Q: I my opponent activates the effect of a monster from their Graveyard, such as the effect of Speedroid Den-Den Daiko Duke, and I chain the second effect of Dark Requiem Xyz Dragon, what happens?
A: In this scenario, when your opponent activates the effect of Speedroid Den-Den Daiko Duke from their Graveyard, you can activate the effect of Dark Requiem Xyz Dragon. Speedroid Den-Den Daiko Duke will be banished as the cost to activate its effect. In this case, when the activation is negated by the effect of Dark Requiem Xyz Dragon, Speedroid Den-Den Daiko Duke cannot be destroyed, so you cannot apply the part of the effect that Special Summons an Xyz Monster from your Graveyard.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19656&keyword=&tag=-1

Q: I my opponent activates the effect of a monster from their hand, such as the effect of Zushin the Sleeping Giant, and I chain the second effect of Dark Requiem Xyz Dragon, what happens?
A: In this scenario, when your opponent activates the effect of Zushin the Sleeping Giant from their hand, you can activate the effect of Dark Requiem Xyz Dragon. Zushin the Sleeping Giant will be revealed in your opponent’s hand as the cost to activate its effect. In this case, when the activation is negated by the effect of Dark Requiem Xyz Dragon, Zushin the Sleeping Giant is destroyed and sent to the Graveyard, so you can then apply the part of the effect that Special Summons an Xyz Monster from your Graveyard.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19655&keyword=&tag=-1

Q: Can the effect of Hichembination Beast Methane Hyd that makes my opponent send a card from their hand or field to the Graveyard be activated even when I Normal Summon a Gemini monster a second time while it is face-up on the field?
A: The third effect of Hichembination Beast Methane Hyd can be activated when a Gemini monster is Normal Summoned, not just from the hand but also when it is Normal Summoned a second time while face-up on the field.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19686&keyword=&tag=-1

Q: Can the effect of Hichembination Beast Methane Hyd that makes my opponent send a card from their hand or field to the Graveyard be activated even when my opponent Normal Summons a Gemini monster?
A: The third effect of Hichembination Beast Methane Hyd can be activated when a Gemini monster is Normal Summoned, by either you or your opponent.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19684&keyword=&tag=-1

Q: I activated Double Summon this turn. If I Normal Summon a Gemini monster twice during this turn, can the effect of Hichembination Beast Methane Hyd that makes my opponent send a card from their hand or field to the Graveyard be activated both times?
A: The third effect of Hichembination Beast Methane Hyd can be activated each time a Gemini monster is Normal Summoned, by detaching 1 Xyz Material from it. During the turn the effect of Double Summon is applied, if you Normal Summon a Gemini monster twice, you can activate the effect of Hichembination Beast Methane Hyd each time.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19653&keyword=&tag=-1

Q: An Archembination Beast Hydragon treated as a Normal Monster is equipped with Supervise, so that it becomes treated as an Effect Monster that has been Normal Summoned again. At this time, can the effect of Hichembination Beast Methane Hyd that makes my opponent send a card from their hand or field to the Graveyard be activated?
A: In this scenario, when a Gemini monster is equipped with Supervise, even though it becomes an Effect Monster with its gained effects, it is not considered to have been successfully Normal Summoned at that time. Thus, the third effect of Hichembination Beast Methane Hyd cannot be activated.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19685&keyword=&tag=-1

Q: While Macro Cosmos is face-up on the field, when a Gemini monster is successfully Normal Summoned, can I still activate the effect of Hichembination Beast Methane Hyd that makes my opponent send a card from their hand or field to the Graveyard?
A: Yes, you can. In this case, when your opponent chooses a card from their hand or field, it is banished by the effect of Macro Cosmos instead of being sent to the Graveyard.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19621&keyword=&tag=-1

Q: Can the effect of Tellarknight Vatlamyus be activated more than once per Chain?
A: No, it cannot. However, if you have 2 copies of Tellarknight Vatlamyus on your field, each one can activate its effect on the same Chain.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19620&keyword=&tag=-1

Q: When I activate the effect of Tellarknight Vatlamyus, my opponent chains Book of Moon. If Tellarknight Vatlamyus is changed to face-down Defense Position, how does its effect resolve?
A: When resolving the effect of Tellarknight Vatlamyus, if it has been changed to face-down Defense Position, you cannot Special Summon a LIGHT “Tellarknight” monster from your Extra Deck using it as the Xyz Material. Note that the part of the effect that prevents you from Xyz Summoning for the rest of the turn is still applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19628&keyword=&tag=-1

Q: Can the Special Summon treated as an Xyz Summon performed by the effect of Tellarknight Vatlamyus be negated by Black Horn of Heaven?
A: The effect of Tellarknight Vatlamyus Special Summons the LIGHT “Tellarknight” monster from your Extra Deck while it is resolving, so the Special Summon cannot be negated by Black Horn of Heaven.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19619&keyword=&tag=-1

Q: I have 2 copies of Treatoad on my field. During my or my opponent’s Standby Phase, how are their effects activated and resolved?
A: The effect of each Treatoad that Special Summons a “Frog” monster from your Deck can only be activates once per Standby Phase. If you have 2 copies of Treatoad on your field, you can activate the effect of each copy, but they will not be on the same Chain, and are activated and resolved separately.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19627&keyword=&tag=-1

Q: When the second effect of Treatoad that negates a Spell/Trap Card or monster effect activation is activated, can Solemn Warning be chained to it?
A: The effect of Treatoad negates the activation of a Spell/Trap Card, or monster effect, and then afterward you can Set the destroyed card to your field. If you negate the activation of a monster effect this way, Setting the monster to your field is treated as Special Summoning it in face-down Defense Position. Therefore, when your opponent activates a monster effect, or activates a Pendulum Monster as a Spell Card to their Pendulum Zone, and you activate the second effect of Treatoad to negate the activation, Solemn Warning can be further chained.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19625&keyword=&tag=-1

Q: My opponent activates Metalfoes Silvird from their hand as a Spell Card to their Pendulum Zone. If I chain the effect of Treatoad that negates a Spell/Trap Card or monster effect activation, what happens?
A: When a Pendulum Monster is activated as a Spell Card in the Pendulum Zone, it is treated as the activation of a Spell Card, so you can chain the effect of Treatoad. In that case, the activated Metalfoes Silvird is destroyed. If you want to apply the effect that Sets the destroyed card to your field, Metalfoes Silvird will be Set to your Monster Zone in face-down Defense Position.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=6121&keyword=&tag=-1

Q: When my opponent activates the effect of Supervise when it is sent from the field to the Graveyard, can I chain the effect of Treatoad that negates a Spell/Trap Card or monster effect activation?
A: You can activate the second effect of Treatoad when your opponent activates a Spell/Trap Card, or monster effect. In this scenario, the activation of the second effect of Supervise is not treated as a Spell Card activation, so you cannot chain the effect of Treatoad.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19626&keyword=&tag=-1

Q: My opponent activates the effect of Sangan. If I chain the effect of Treatoad that negates a Spell/Trap Card or monster effect activation, what happens?
A: When the effect of your opponent’s Sangan activates in the Graveyard, you can chain the second effect of Treatoad. In that case, the activation of the effect is negated, but Sangan cannot be destroyed while in the Graveyard, so you cannot then Set it to your field.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19537&keyword=&tag=-1

Q: My opponent activates Dimension Reflector and Special Summons it as an Effect Monster. Afterward, if its effect that inflicts damage to the opponent is activated, can I chain the effect of Treatoad that negates a Spell/Trap Card or monster effect activation?
A: When your opponent activates the second effect of Dimension Reflector that has been Special Summoned as an Effect Monster, you can chain the second effect of Treatoad. In that case, the activation of the monster effect of Dimension Reflector is negated, and it is destroyed. If you want to apply the effect that Sets the destroyed card to your field, Dimension Reflector will be Set to your Spell & Trap Zone.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19538&keyword=&tag=-1

Q: When activating the effect of Treatoad that negates a Spell/Trap Card or monster effect activation, can I send a Graydle Cobra treated as an Equip Card by its own effect to the Graveyard as the cost?
A: To activate the second effect of Treatoad, you must send an Aqua-Type monster that is either in your hand or face-up in your Monster Zone to the Graveyard. In this scenario, a Graydle Cobra treated as an Equip Card by its own effect is not treated as a monster, so it cannot be sent to the Graveyard to activate the effect of Treatoad.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19624&keyword=&tag=-1

Q: If a face-down Defense Position Treatoad on my field is destroyed by battle or card effect, can I activate its effect that adds a WATER monster in my Graveyard to my hand?
A: Even if Treatoad is in face-down Defense Position when it is sent to the Graveyard, you can activate its third effect.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19622&keyword=&tag=-1

Q: Can I activate the effect of Treatoad that adds a WATER monster in my Graveyard to my hand by targeting a WATER Fusion, Synchro, or Xyz Monster?
A: Yes, you can. (That same Treatoad can also be targeted.) In that case, the targeted Fusion, Synchro, or Xyz Monster is returned to the Extra Deck instead of being added to your hand.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19623&keyword=&tag=-1

Q: Timegazer Magician and Stargazer Magician are the only face-up cards in my Extra Deck. If I activate Amazing Pendulum, but then chain Pendulum Reborn and Special Summon Timegazer Magician from my Extra Deck, how does Amazing Pendulum resolve?
A: The effect of Amazing Pendulum adds 2 “Magician” Pendulum Monsters with different names from your Extra Deck to your hand. Therefore, in this scenario, if there is only 1 “Magician” Pendulum Monster face-up in your Extra Deck when resolving Amazing Pendulum, the effect is not applied. (No monsters are added to your hand.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19618&keyword=&tag=-1

Q: I activate Rank-Up-Magic Launch of the Phantom Knights by targeting my face-up Dark Rebellion Xyz Dragon. If Mystical Space Typhoon is chained, and Rank-Up-Magic Launch of the Phantom Knights is destroyed, how does it resolve?
A: In this scenario, if Mystical Space Typhoon is chained to the activation of Rank-Up-Magic Launch of the Phantom Knights, and Rank-Up-Magic Launch of the Phantom Knights is destroyed, the Special Summon of a DARK Xyz Monster that is 1 Rank higher than the targeted monster by using it as Xyz Material still occurs normally, but the part of the effect that attaches Rank-Up-Magic Launch of the Phantom Knights to that Special Summoned monster does not apply.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19617&keyword=&tag=-1

Q: I activate Rank-Up-Magic Launch of the Phantom Knights by targeting my face-up Dark Rebellion Xyz Dragon. If Book of Moon is chained, and Dark Rebellion Xyz Dragon is changed to face-down Defense Position, how does Rank-Up-Magic Launch of the Phantom Knights resolve?
A: In this scenario, if Book of Moon is chained to the activation of Rank-Up-Magic Launch of the Phantom Knights, and the targeted Xyz Monster is changed to face-down Defense Position, you do not Special Summon another Xyz Monster using that target as Xyz Material. (Since the Special Summon does not occur, Rank-Up-Magic Launch of the Phantom Knights is sent to the Graveyard and is not attached as Xyz Material.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19616&keyword=&tag=-1

Q: I activate the second effect of Rank-Up-Magic Launch of the Phantom Knights by banishing it from my Graveyard, targeting a face-up The Phantom Knights of Break Sword. When it resolves, can I attach The Phantom Knights of Shade Brigandine to it as Xyz Material?
A: The effect of The Phantom Knights of Shade Brigandine Special Summons it as a monster, but the card itself is not treated as a monster while it is in your hand. Therefore, if you activate the effect of Rank-Up-Magic Launch of the Phantom Knights from your Graveyard, The Phantom Knights of Shade Brigandine cannot be attached to the targeted monster as Xyz Material.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19615&keyword=&tag=-1

Q: I activate the second effect of Rank-Up-Magic Launch of the Phantom Knights by banishing it from my Graveyard, targeting a face-up The Phantom Knights of Break Sword. If Compulsory Evacuation Device is chained, and The Phantom Knights of Break Sword is removed from the field, how does the effect of Rank-Up-Magic Launch of the Phantom Knights resolve?
A: In this scenario, when resolving the second effect of Rank-Up-Magic Launch of the Phantom Knights, if the targeted Xyz Monster is no longer on the field, the effect is not applied. (“The Phantom Knights” monster remains in your hand.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19614&keyword=&tag=-1

Q: I activate the second effect of Rank-Up-Magic Launch of the Phantom Knights by banishing it from my Graveyard, targeting a face-up Dark Rebellion Xyz Dragon. If Book of Moon is chained, and Dark Rebellion Xyz Dragon is changed to face-down Defense Position, how does the effect of Rank-Up-Magic Launch of the Phantom Knights resolve?
A: In this scenario, when resolving the second effect of Rank-Up-Magic Launch of the Phantom Knights, even if the targeted Xyz Monster is in face-down Defense Position, the effect of attaching “The Phantom Knights” monster to it is applied normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19613&keyword=&tag=-1

Q: If there are 2 copies of Rank-Up-Magic Launch of the Phantom Knights in my Graveyard, can I activate the effect of each copy during the same turn?
A: The effect of Rank-Up-Magic Launch of the Phantom Knights can be activated as long as there is a monster with “The Phantom Knights” in its name in your hand to attach to a targeted DARK Xyz Monster. Note that the effect of Rank-Up-Magic Launch of the Phantom Knights that activates in your Graveyard is a Spell Speed 1 effect, so if you activate the effects of 2 different copies in your Graveyard, they are not activated on the same Chain, but rather activate and resolve separately.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19612&keyword=&tag=-1

Q: If I have no available Monster Zones, can I activate Chokoikoi? Also, if I activate Chokoikoi, but my opponent chains Ojama Trio so that I have no available Monster Zones when Chokoikoi resolves, what happens?
A: If you have no available Monster Zones, you cannot activate Chokoikoi. If your opponent chains Ojama Trio to the activation of your Chokoikoi, so that you no longer have any available Monster Zones, the effect of Chokoikoi is applied normally. Since you cannot Special Summon any monsters, all 3 excavated cards including any excavated “Cardian” monsters are banished face-down, and you lose 3000 Life Points.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19651&keyword=&tag=-1

Q: In order to activate Chokoikoi, do I need to have 3 or more available Monster Zones?
A: If you have no available Monster Zones, you cannot activate Chokoikoi. Since it is unknown how many “Cardian” monsters you will excavate when resolving Chokoikoi, you can activate it as long as you have 1 or more available Monster Zones. For example, if you activate Chokoikoi while you only have 1 available Monster Zone, and the 3 excavated cards are Cardian – Yanagi ni Ono no Michikaze, Hana Awase, and Cardian – Kiri, either Cardian – Yanagi ni Ono no Michikaze or Cardian – Kiri will be Special Summoned, but the monster that you did not Special Summon as well as Hana Awase will be banished face-down, and you will lose 2000 Life Points.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19652&keyword=&tag=-1

Q: Can Chokoikoi be activated if the effect of Vanity’s Emptiness is applying? Also, if Chokoikoi is activated, but Vanity’s Emptiness is chained, how does Chokoikoi resolve?
A: While the effect of Vanity’s Emptiness is applying, so that neither player can Special Summon monsters, Chokoikoi cannot be activated. If Vanity’s Emptiness is chained to the activation of Chokoikoi, you will still excavate the top 3 cards of your Deck normally, but since you cannot Special Summon any monsters, all excavated cards including “Cardian” monsters are banished face-down, and you lose 3000 Life Points.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19649&keyword=&tag=-1

Q: Can Chokoikoi be activated if the effect of Imperial Iron Wall is applying? Also, if Chokoikoi is activated, but Imperial Iron Wall is chained, how does Chokoikoi resolve?
A: While the effect of Imperial Iron Wall is applying, so that neither player can banish cards, Chokoikoi cannot be activated. If Imperial Iron Wall is chained to the activation of Chokoikoi, the effect of Chokoikoi is not applied. (You do not excavate any cards from the top of your Deck.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19650&keyword=&tag=-1

Q: Can I activate Chokoikoi while I have less than 3000 Life Points?
A: Yes, you can. In this case, when resolving the effect of Chokoikoi, if the amount of Life Points you lose for each card that is banished face-down would make your Life Points 0, you lose the Duel.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19683&keyword=&tag=-1

Q: If Evilswarm Ophion with Xyz Material is face-up on the field, and its effect that prevents players from Special Summoning Level 5 or higher monsters is applying, can Chokoikoi be activated?
A: Yes, it can. In this case, if you excavate any Level 4 or lower “Cardian” monsters such as Cardian – Matsu ni Tsuru, they will be Special Summoned normally, but any Level 5 or higher excavated “Cardian” monsters such as Cardian – Susuki ni Tsuki and any cards that are not “Cardian” monsters will be banished face-down, and you lose 1000 Life Points for each.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19536&keyword=&tag=-1

Q: Can I activate the second effect of Chokoikoi that Special Summons a “Cardian” monster from my hand by Tributing a monster other than a “Cardian” monster?
A: Yes, you can.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19611&keyword=&tag=-1

Q: During my Main Phase 1, I Synchro Summon Crystron Ametrix, then during my Main Phase 2, I activate Krystal Potential, and then further in the turn Synchro Summon Crystron Quandum and Crystron Phoenixion. In this case, during the End Phase of this turn, how many cards can I draw from the effect of Krystal Potential?
A: The effect of Krystal Potential allows you to draw cards equal to the number of “Crystron” Synchro Monsters you Synchro Summoned this turn. (This effect includes “Crystron” monsters that you Synchro Summoned during the turn before activating Krystal Potential.) Therefore, in this scenario, since you Synchro Summoned Crystron Ametrix, Crystron Quandum, and Crystron Phoenixion, you will be able to draw 3 cards from the effect of Krystal Potential.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19648&keyword=&tag=-1

Q: Can both players use the effects of Spark Field?
A: The effects of Spark Field can only be used by its controller. (The opponent cannot use its effects.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19682&keyword=&tag=-1

Q: Spark Field is face-up in my Field Zone, and I used all 3 of its effects this turn. If that Spark Field is sent to the Graveyard this turn, and I activate a second copy of Spark Field, which of its effects can I use again?
A: The effect of the second Spark Field that allows you to Normal Summon a Level 5 or higher Gemini monster without Tributing, and the effect that banishes a Gemini monster on your field and destroys a card on your opponent’s field, can each be used that turn. Note that the effect that allows you to Normal Summon a Gemini monster in addition to your Normal Summon/Set cannot be used again during the same turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19529&keyword=&tag=-1

Q: While the first effect of Spark Field is applying, can I Normal Summon a Level 7 or higher Gemini monster without Tributing?
A: If you apply the first effect of Spark Field, you can Normal Summon a Level 7 or higher Gemini monster without Tributing any monsters.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19535&keyword=&tag=-1

Q: While the first effect of Spark Field is applying, can I Set a Level 5 or higher Gemini monster in face-down Defense Position without Tributing?
A: If you apply the first effect of Spark Field, you must Normal Summon the Level 5 or higher Gemini monster face-up. (It cannot be Set in face-down Defense Position.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19534&keyword=&tag=-1

Q: If I Normal Summon a Gemini monster in addition to my Normal Summon/Set using the second effect of Spark Field, can I apply the first effect of Spark Field and Normal Summon it without Tributing?
A: Since the effect of Spark Field that allows you to Normal Summon a Gemini monster without Tributing can only be used once per turn, as long as you did not already use the effect that turn, you can Normal Summon a Level 5 or higher Gemini monster without Tributing even when you Normal Summon it in addition to your Normal Summon/Set using the second effect of Spark Field.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19681&keyword=&tag=-1

Q: When I Normal Summon a Gemini monster in addition to my Normal Summon/Set using the second effect of Spark Field, can I Normal Summon a Gemini monster that is already face-up on my field a second time?
A: When applying the effect of Spark Field that allows you to Normal Summon a Gemini monster in addition to your Normal Summon/Set that turn, you can Normal Summon a Gemini monster from your hand, as well as one that is already face-up on the field currently treated as a Normal Monster.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19533&keyword=&tag=-1

Q: This turn, I activated the third effect of Spark Field that destroys an opponent’s card, and Archembination Beast Dioxin is banished until my opponent’s End Phase. During my opponent’s turn, if they activate Harpie’s Feather Duster and destroy Spark Field, what happens to the banished Archembination Beast Dioxin?
A: In this scenario, if a Gemini monster was banished by the effect of Spark Field, and then Spark Field leaves the field, the banished monster with return to the field during your opponent’s End Phase normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19680&keyword=&tag=-1

Q: I activate the third effect of Spark Field by targeting a Set card in my opponent’s Spell & Trap Zone. If my opponent chains Emergency Provisions, and sends the targeted Set card to the Graveyard as its cost, how does the effect of Spark Field resolve?
A: When resolving the third effect of Spark Field, even if the targeted card is no longer on the field, you will still banish 1 Gemini monster treated as an Effect Monster on your field until your opponent’s End Phase.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19531&keyword=&tag=-1

Q: If I activate the third effect of Spark Field, but Imperial Iron Wall is chained, how does the effect resolve?
A: In this scenario, if the effect of Imperial Iron Wall is applying when you resolve the third effect of Spark Field, you cannot banish a Gemini monster from your field, and the targeted card is not destroyed.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19530&keyword=&tag=-1

Q: I activate Igknight Unite by targeting an Igknight Squire on my field. If my opponent chains Book of Moon, changing Igknight Squire to face-down Defense Position, what happens?
A: In this scenario, when resolving Igknight Unite, even if an “Igknight” monster that was targeted is in face-down Defense Position, it is destroyed normally, and you Special Summon an “Igknight” monster from your Deck.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19610&keyword=&tag=-1

Q: I activate Igknight Unite by targeting an Igknight Gallant on my field. If my opponent chains Vanity’s Emptiness, what happens?
A: In this scenario, even if the effect of Vanity’s Emptiness is applying, the effect of Igknight Unite is resolved. The targeted Igknight Gallant is destroyed normally, but you do not Special Summon an “Igknight” monster from your Deck. Note that if Vanity’s Emptiness is already face-up on the field, Igknight Unite cannot be activated.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19647&keyword=&tag=-1

Q: I activate Igknight Unite by targeting a face-up Igknight Burst on my field. If I then chain the effect of Stardust Spark Dragon, targeting that Igknight Burst, what happens?
A: In this scenario, due to the effect of Stardust Spark Dragon, Igknight Burst is not destroyed by the effect of Igknight Unite, and you cannot Special Summon an “Igknight” monster from your Deck.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19609&keyword=&tag=-1

Q: Can Genesis Tellarknight destroy itself with its effect?
A: The effect of Genesis Tellarknight cannot choose itself to destroy.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19608&keyword=&tag=-1

Q: I activate “A” Cell Recombination Device by targeting a Goblin Attack Force on my opponent’s field. If my opponent chains Book of Moon, changing Goblin Attack Force to face-down Defense Position, what happens?
A: Even in this scenario, the effect of “A” Cell Recombination Device will send 1 “Alien” monster from your Deck to the Graveyard. However, since the targeted Goblin Attack Force is in face-down Defense Position, the part of the effect that places A-Counters on the targeted monster is not applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19645&keyword=&tag=-1

Q: If I activate “A” Cell Recombination Device by targeting a Silent Magician LV8 on my opponent’s field, how does it resolve?
A: Even in this scenario, the effect of “A” Cell Recombination Device will send 1 “Alien” monster from your Deck to the Graveyard. However, since the targeted Silent Magician LV8 is unaffected by the opponent’s Spell effects, the part of the effect that places A-Counters on it is not applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19607&keyword=&tag=-1

Q: While the effect of Macro Cosmos is applying, if I activate “A” Cell Recombination Device, how does it resolve?
A: In this scenario, the “Alien” monster that would be sent from your Deck to the Graveyard by the effect of “A” Cell Recombination Device is banished instead by the effect of Macro Cosmos, and the part of the effect that places A- Counters on the targeted monster is not applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19646&keyword=&tag=-1

Q: Can Pot of Avidity be activated by targeting a monster that is banished face-down?
A: When selecting banished monsters to target with Pot of Avidity, you cannot include any monsters that are banished face-down. You must target a total of 3 monsters that are banished face-up.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19644&keyword=&tag=-1

Q: If I activate Pot of Avidity by targeting a total of 3 banished Fusion, Synchro, and/or Xyz Monsters, how does it resolve?
A: If you activate Pot of Avidity by targeting a total of 3 banished Fusion, Synchro, and/or Xyz Monsters, those monsters are returned to the Extra Deck instead of the Main Deck. Note that since no cards were returned to the Main Deck, it is not shuffled. After that, you will still draw 1 card normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19679&keyword=&tag=-1

Q: I activate Pot of Avidity by targeting my banished Infernoid Antra, Infernoid Harmadik, and Infernoid Attondel. If my opponent chains their own Pot of Avidity, by targeting my Infernoid Antra and their own White Dragon Wyverburster and Black Dragon Collapserpent, how does each Pot of Avidity resolve?
A: In this scenario, your opponent’s Pot of Avidity activated as Chain Link 2 resolves first, so Infernoid Antra, White Dragon Wyverburster, and Black Dragon Collapserpent are each returned to their owner’s Decks, then your opponent draws 1 card. Then, when resolving your Pot of Avidity at Chain Link 1, since the Infernoid Antra that you targeted is no longer banished, you do not return any monsters to the Deck, and you cannot draw 1 card.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19643&keyword=&tag=-1

Q: If the effect of Quarantine is activated by targeting a Set card in my opponent’s Spell & Trap Zone, but my opponent chains that card, what happens?
A: If the card targeted by the effect of Quarantine is chained, the effect of Quarantine is not applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19528&keyword=&tag=-1

Q: While the effect of Imperial Iron Wall is applying, can I activate King’s Synchro? Also, if Imperial Iron Wall is chained to King’s Synchro, what happens?
A: Even if the effect of Imperial Iron Wall is applying, you can activate King’s Synchro. In that case, only the part of the effect that negates the attacking monster’s attack is applied. (The additional effect cannot be applied. If Imperial Iron Wall is chained to King’s Synchro, the result is the same.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19527&keyword=&tag=-1

Q: Can Tyrant Red Dragon Archfiend be Special Summoned by the effect of King’s Synchro?
A: When you Synchro Summon Tyrant Red Dragon Archfiend normally, you must use 2 Tuner monsters and 1 or more non-Tuner monsters as Synchro Materials. However, when Special Summoning a monster by the effect of King’s Synchro treating it as a Synchro Summon, you use the Synchro Monster on your field that was attacked by your opponent’s monster and 1 Tuner monster in your Graveyard whose total Levels equal the Level of the monster you Special Summon. For example, if your Level 8 Scarlight Red Dragon Archfiend is attacked, and the Level 2 Tuner monster Red Resonator is in your Graveyard, you can banish these monsters whose total Levels equal 10 to Special Summon Tyrant Red Dragon Archfiend.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19526&keyword=&tag=-1

Q: While the effect of my opponent’s Stygian Dirge is applying, if my opponent attacks a Scarlight Red Dragon Archfiend on my field whose Level is reduced by 1, can I activate King’s Synchro?
A: Even in this scenario, since an opponent’s monster is attacking a Synchro Monster on your field, you can activate King’s Synchro, and the attack will be negated. Note that if you choose to apply the effect that Special Summons a Synchro Monster from your Extra Deck by banishing a Tuner monster from your Graveyard and the attacked Synchro Monster from your field, you will Special Summon a Synchro Monster whose Level is equal to the total Levels of those 2 monsters before being banished. (For example, if you banish Scarlight Red Dragon Archfiend from your field that is currently Level 7, and a Level 3 Dark Resonator from your Graveyard, the sum of their Levels is 10, so you can Special Summon Tyrant Red Dragon Archfiend.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=6126&keyword=&tag=-1

Q: If my opponent has a 3000 ATK Raidraptor – Satellite Cannon Falcon on their side of the field, and I have a 3000 ATK Galaxy-Eyes Cipher Dragon on mine, can I activate Double Cipher?
A: In this scenario, both Raidraptor – Satellite Cannon Falcon and Galaxy-Eyes Cipher Dragon have the highest ATK on the field, which means that your opponent controls a monster that has the highest ATK on the field. Therefore, you can activate Double Cipher in this situation.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19642&keyword=&tag=-1

Q: I activate Double Cipher by targeting a face-up Galaxy-Eyes Cipher Dragon on my field with 1 Xyz Material. If my opponent chains Space Cyclone, which detaches 1 Xyz Material from Galaxy-Eyes Cipher Dragon, how does Double Cipher resolve?
A: In this scenario, due to the effect of Space Cyclone, since the Galaxy-Eyes Cipher Dragon targeted with Double Cipher has no Xyz Material, you cannot apply the effect that detaches all Xyz Materials from it. In that case, the part of the effect that Special Summons a monster from your Extra Deck is not applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19641&keyword=&tag=-1

Q: I activate Double Cipher by targeting a face-up Number 62: Galaxy-Eyes Prime Photon Dragon on my field. If my opponent chains Forbidden Lance, making Number 62: Galaxy-Eyes Prime Photon Dragon unaffected by Spell/Trap effects, how does Double Cipher resolve?
A: Detaching all Xyz Materials from the targeted Xyz Monster and Special Summoning a monster from your Extra Deck with the same name are not effects that affect the targeted monster. Therefore, in this scenario, if Number 62: Galaxy-Eyes Prime Photon Dragon is unaffected by Trap effects when Double Cipher resolves, the effect is still applied normally.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19640&keyword=&tag=-1

Q: I activate Double Cipher by targeting a face-up Neo Galaxy-Eyes Photon Dragon on my field. If my opponent chains Book of Moon, changing Neo Galaxy-Eyes Photon Dragon to face-down Defense Position, how does Double Cipher resolve?
A: The effects of Double Cipher are only applied if the targeted monster is face-up when the card resolves. Therefore, in this scenario, if the targeted Neo Galaxy-Eyes Photon Dragon is in face-down Defense Position when Double Cipher resolves, the effects are not applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19639&keyword=&tag=-1

Q: I activated Cipher Bit this turn, targeting a face-up Galaxy-Eyes Cipher Dragon on my field. During the same turn, can I activate a second Cipher Bit by targeting the same Galaxy-Eyes Cipher Dragon?
A: Any face-up “Galaxy-Eyes” or “Cipher” Xyz Monster in your Monster Zone will be the correct target for Cipher Bit, so you can activate 2 copies in the same turn targeting the same monster. If the effects of both copies of Cipher Bit that prevent that monster from being destroyed by battle or card effects once that turn are applied at the same time, it will still only be protected once from battle or card effects. Note that after the first Cipher Bit is activated, if the effect that prevents the monster from being destroyed by battle or card effects once that turn is used, and then the second copy of Cipher Bit is activated, that monster will once more not be destroyed by battle or card effects that turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19606&keyword=&tag=-1

Q: If Mystical Space Typhoon is chained to Cipher Bit, and Cipher Bit is destroyed, how does its effect resolve?
A: If Mystical Space Typhoon is chained to Cipher Bit, and Cipher Bit is destroyed and sent to the Graveyard, it cannot be attached to the targeted monster as an Xyz Material, and the effect that prevents it from being destroyed by battle or card effects once that turn is not applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19638&keyword=&tag=-1

Q: I activate Cipher Bit by targeting a face-up Galaxy-Eyes Cipher Dragon on my field. If my opponent chains Forbidden Lance, making Galaxy-Eyes Cipher Dragon unaffected by Spell/Trap effects, how does Cipher Bit resolve?
A: The effects of Cipher Bit that attach it as an Xyz Material to the targeted monster and protect it from being destroyed by battle or card effects once that turn both affect the targeted monster. Therefore, in this scenario, if Galaxy-Eyes Cipher Dragon is unaffected by Trap effects when Cipher Bit resolves, its effects are not applied and Cipher Bit is sent to the Graveyard.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19637&keyword=&tag=-1

Q: I activate Cipher Bit by targeting a face-up Galaxy-Eyes Full Armor Photon Dragon on my field. If my opponent chains Book of Moon, changing Galaxy-Eyes Full Armor Photon Dragon to face-down Defense Position, how does Cipher Bit resolve?
A: Even if the monster targeted by Cipher Bit is in face-down Defense Position when it resolves, the effects are applied normally. Therefore, in this scenario, Cipher Bit is attached to Galaxy-Eyes Full Armor Photon Dragon as an Xyz Material, and Galaxy-Eyes Full Armor Photon Dragon is not destroyed by battle or card effects once that turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19636&keyword=&tag=-1

Q: I activated Cipher Bit this turn, attaching it to a Galaxy-Eyes Full Armor Photon Dragon on my field. This turn, if I activate the effect of Galaxy-Eyes Full Armor Photon Dragon by detaching Cipher Bit from it, will the effect that prevents Galaxy-Eyes Full Armor Photon Dragon from being destroyed by battle or card effects still apply?
A: The effect of Cipher Bit that prevents the targeted monster from being destroyed by battle or card effects once that turn is resolved when Cipher Bit resolves. Even if the Cipher Bit that was attached to the monster as Xyz Material is detached, the effect that prevents the targeted monster from being destroyed by battle or card effects once that turn remains.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19635&keyword=&tag=-1

Q: Ikasama Gohatto is Set in my Spell & Trap Zone. If I do not have a “Cardian” Synchro Monster on my field, can I activate the Set Ikasama Gohatto and use its effect as part of that Chain Link to return all monsters on my opponent’s field Special Summoned from the hand to their owner’s hand?
A: In this scenario, even if you do not have a “Cardian” Synchro Monster on your field, you can activate a Set Ikasama Gohatto. Even if you activate Ikasama Gohatto and its effect as part of the same Chain Link, the effect that sends it to the Graveyard is applied immediately. As a result, since it is no longer face-up on the field, you cannot apply the effect that returns monsters to the hand.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19677&keyword=&tag=-1

Q: If my opponent activates Eye of the Void and Special Summons Infernoid Onuncu from their hand, can I activate the effect of Ikasama Gohatto?
A: The effect of Ikasama Gohatto can be activated when your opponent Special Summons a monster from their hand. This includes not only Pendulum Summons or Special Summons that do not create a Chain, such as the Special Summon of Black Luster Soldier – Envoy of the Beginning by its own procedure, but also by card effects. In this scenario, as long as Eye of the Void was activated as Chain Link 1 and a monster was Special Summoned from your opponent’s hand, you can activate the effect of Ikasama Gohatto. If Eye of the Void was activated as Chain Link 2 or higher, the last effect to resolve was the Chain Link 1 effect, so Ikasama Gohatto cannot be activated.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19678&keyword=&tag=-1

Q: My opponent Pendulum Summons a Timebreaker Magician from their hand and an Odd-Eyes Pendulum Dragon from their Extra Deck. In this case, can I activate the effect of Ikasama Gohatto?
A: Even if your opponent Pendulum Summons monsters from both their hand and Extra Deck at the same time, you can activate the effect of Ikasama Gohatto. In this scenario, only Timebreaker Magician is returned to your opponent’s hand.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19634&keyword=&tag=-1

Q: My opponent activates the effect of Prediction Princess Coinorma and Special Summons Prediction Princess Crystaldine from their hand in face-down Defense Position. In this case, can I activate the effect of Ikasama Gohatto?
A: In this scenario, since Prediction Princess Crystaldine was Special Summoned from the hand by the effect of Prediction Princess Coinorma, you can activate the effect of Ikasama Gohatto, and the face-down Defense Position Prediction Princess Crystaldine is returned to your opponent’s hand.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19525&keyword=&tag=-1

Q: If I do not have a “Crystron” Tuner monster in either my hand or my Graveyard, can I activate Crystron Entry? Furthermore, if I activate Crystron Entry, but an effect is chained that results in me not having a “Crystron” Tuner monster in either my hand or my Graveyard, how does it resolve?
A: The effect of Crystron Entry Special Summons 2 “Crystron” Tuner monsters; 1 from your hand and 1 from your Graveyard. Therefore, if you do not have a “Crystron” Tuner monster in either your hand or your Graveyard, you cannot activate Crystron Entry. If Crystron Entry is activated, but you do not have a “Crystron” Tuner monster in either your hand or your Graveyard when it resolves, the effect is not applied. (You do not Special Summon any monsters.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19676&keyword=&tag=-1

Q: I activate the second effect of Crystron Entry from my Graveyard, targeting a face-up Crystron Rosenix on my field. If Raigeki Break is chained, and Crystron Rosenix is destroyed and sent to the Graveyard, how does the effect of Crystron Entry resolve?
A: When resolving the effect of Crystron Entry activated from your Graveyard, if the targeted monster has been destroyed and sent to the Graveyard, the effects of Crystron Entry are not applied. (You do not look through your Deck for a “Crystron” monster with a different Level.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19605&keyword=&tag=-1

Q: I activate the second effect of Crystron Entry from my Graveyard, targeting a face-up Crystron Ametrix on my field. If Book of Moon is chained, and Crystron Ametrix is changed to face-down Defense Position, how does the effect of Crystron Entry resolve?
A: When resolving the effect of Crystron Entry activated from your Graveyard, if the targeted monster has been changed to face-down Defense Position, the effects of Crystron Entry are not applied. (You do not look through your Deck for a “Crystron” monster with a different Level.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19604&keyword=&tag=-1

Q: Macro Cosmos is face-up on my opponent’s field. In this situation, can I activate the second effect of Crystron Entry by banishing it from my Graveyard?
A: Unless Crystron Entry was sent to your Graveyard that turn, you can activate its second effect even while the effect of Macro Cosmos is applying. In that case, the “Crystron” monster with a different Level than the targeted monster is banished from your Deck instead of being sent to the Graveyard, and the part of the effect that changes the targeted monster’s Level does not apply.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19603&keyword=&tag=-1

Q: My Crystron Rosenix is banished, and I have Crystron Impact Set in my Spell & Trap Zone. If my opponent does not control any face-up monsters, can I activate Crystron Impact?
A: Even if your opponent does not control any face-up monsters, you can activate Crystron Impact. In this scenario, the banished Crystron Rosenix is Special Summoned normally, but the effect that makes the DEF of all monsters on your opponent’s field 0 does not apply.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19633&keyword=&tag=-1

Q: I activate Crystron Impact and Special Summon my banished Crystron Quandum. After that, if Crystron Quandum is used as a Synchro Material monster and leaves the field, will the DEF of my opponent’s monsters that were changed to 0 return to their original values?
A: The DEF of monsters changed to 0 by the effect of Crystron Impact remain 0 as long as those monsters remain face-up on the field. (Even if the monster Special Summoned by Crystron Impact leaves the field, those monsters’ DEF remain 0.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19524&keyword=&tag=-1

Q: I activate Crystron Impact, but Vanity’s Emptiness is chained. In that case, will the effect that makes the DEF of all monsters on my opponent’s field become 0 be applied?
A: In this scenario, if the effect of Vanity’s Emptiness is applying when Crystron Impact resolves, since you are not able to Special Summon the targeted monster, the part of the effect that makes the DEF of all monsters on your opponent’s field become 0 is not applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19602&keyword=&tag=-1

Q: While I only have 1 available Monster Zone, I activate Burn Out by banishing Chembination Beast Oxyn Ox from my field. If I then chain Call of the Haunted, so that I once again only have 1 available Monster Zone, how does Burn Out resolve?
A: Even if you only have 1 available Monster Zone, since you banish a “Chembination Beast” monster from your field to activate Burn Out, you can still activate the card. If you chain Call of the Haunted to Special Summon another monster from your Graveyard, so that you only have 1 available Monster Zone when Burn Out resolves, its effect does not apply. (No “Chembination Beast” monsters are Special Summoned from your Deck, nor do they have to be sent to the Graveyard.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19600&keyword=&tag=-1

Q: I activate Burn Out, and then chain Needlebug Nest. If the effect of Needlebug Nest results in me only having 1 “Chembination Beast” monster in my Deck, how does Burn Out resolve?
A: The effect of Burn Out Special Summons 2 “Chembination Beast” monsters from your Deck with different names, so if it is not possible to Special Summon 2, the effect is not applied. In this scenario, you do not Special Summon any “Chembination Beast” monsters.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19601&keyword=&tag=-1

Q: 2 copies of Burn Out that were sent to the Graveyard during previous turns are in my Graveyard. In this situation, if my opponent declares a direct attack, can I activate the effects of both copies of Burn Out?
A: Burn Out can only be activated once per turn, but the effect that is activated by banishing it from your Graveyard can be activated by more than one copy per turn. In this scenario, when an opponent’s monster declares a direct attack, you can activate the effects of both copies of Burn Out in your Graveyard and Special Summon a banished Gemini monster with each.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19632&keyword=&tag=-1

Q: When an opponent’s monster declares a direct attack, I activate the second effect of Burn Out by banishing it from my Graveyard, targeting my banished Archembination Beast Hydragon. If Burial from a Different Dimension is chained, and Archembination Beast Hydragon is returned to the Graveyard, how does the effect of Burn Out resolve?
A: If the Gemini monster targeted by the second effect of Burn Out is in your Graveyard when the effect resolves, it is not Special Summoned.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19523&keyword=&tag=-1

Q: I activate the first effect of PSY-Frame Accelerator targeting a PSY-Frame Multi-Threader on my field. If my opponent chains Book of Moon, changing PSY-Frame Multi-Threader to face-down Defense Positon, how does the effect of PSY-Frame Accelerator resolve?
A: Even in this scenario, the effect of PSY-Frame Accelerator is applied. Note that if the targeted PSY-Frame Multi-Threader was changed to face-down Defense Position by the effect of Book of Moon, PSY-Frame Multi-Threader is banished face-down, and will return to the field in face-down Defense Position during your next Standby Phase.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=10104&keyword=&tag=-1

Q: I have no “PSY-Frame” monsters in my hand. If my opponent activates Compulsory Evacuation Device, and returns my PSY-Frame Multi-Threader to my hand, can I activate the second effect of PSY-Frame Accelerator?
A: In this scenario, if PSY-Frame Multi-Threader is returned to your hand, it can be Special Summoned from your hand with the effect of PSY-Frame Accelerator.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19522&keyword=&tag=-1

Q: Phantom of Chaos has gained the name and effects of PSY-Framelord Zeta. In this situation, if Phantom of Chaos leaves the field, can I activate the second effect of PSY-Frame Accelerator?
A: In this scenario, if Phantom of Chaos leaves the field while it is treated as a “PSY-Frame” monster, you can activate the second effect of PSY-Frame Accelerator.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19521&keyword=&tag=-1

Q: A face-up Graydle Cobra on my field is targeted with an Equip Spell Card such as Comic Hand, or a Continuous Spell/Trap Card such as Fiendish Chain. If I chain Graydle Combat and activate the effect that changes the targeting effect to “Destroy that monster”, what happens?
A: In this scenario, even if an Equip Spell Card or Continuous Spell/Trap Card is activated by targeting 1 “Graydle” monster on your field, you can chain Graydle Combat. When the effect of Graydle Combat is applied, the effect “Destroy that monster” is resolved without the Equip Spell Card being equipped or the Continuous Spell/Trap Card remaining on the field, so that after this effect resolves, they are sent to the Graveyard as if they were Normal Spell/Trap Cards. (An Equip Spell Card or Continuous Spell/Trap Card sent to the Graveyard this way is not treated as being sent to the Graveyard by a card effect.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19520&keyword=&tag=-1

Q: Mind Control is activated by targeting a face-up Graydle Alligator on my field. If I chain Graydle Combat and activate the effect that changes the targeting effect to “Destroy that monster”, is Graydle Alligator treated as being destroyed by the effect of a Trap Card?
A: If you select the effect of Graydle Combat that changes the targeting effect to “Destroy that monster”, the effect will be applied when that targeting effect resolves. In this scenario, if Graydle Alligator was targeted by Mind Control, the effect of Mind Control becomes “Destroy that monster”, and Graydle Alligator is treated as being destroyed by the effect of a Spell Card. (In that case, the effect of Graydle Alligator can be activated.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19598&keyword=&tag=-1

Q: Compulsory Evacuation Device is activated by targeting a face-up Graydle Cobra on my field. If I chain Graydle Combat and activate the effect that changes the targeting effect to “Destroy that monster”, can I reselect the target to destroy?
A: If you select the effect of Graydle Combat that changes the targeting effect to “Destroy that monster”, you cannot reselect the target. In this scenario, if Graydle Cobra was targeted by Compulsory Evacuation Device, the effect of Compulsory Evacuation Device becomes “Destroy that monster”, and Graydle Cobra is destroyed. (Since Graydle Cobra was destroyed by the effect of a Trap Card, you can activate its effect.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19599&keyword=&tag=-1

Q: Qliphort Down is activated, but Mystical Space Typhoon is chained and Qliphort Down is destroyed. In this case, will the part of the effect that prevents my “Qli” Spell/Trap Cards from being destroyed by card effects this turn be applied?
A: If Qliphort Down is activated, but Mystical Space Typhoon is chained and Qliphort Down is destroyed, it cannot be Special Summoned as an Effect Monster. Therefore, the effect that is applied during the turn it is Special Summoned is not applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19519&keyword=&tag=-1

Q: Qliphort Down is activated and Special Summoned by its own effect. Afterward, if Compulsory Evacuation Device is activated and returns Qliphort Down to the hand, will the part of the effect that prevents my “Qli” Spell/Trap Cards from being destroyed by card effects this turn still be applied?
A: The effect that prevents my “Qli” Spell/Trap Cards from being destroyed by card effects this turn is applied when Qliphort Down resolves, so that even if Qliphort Down is no longer on that field, the effect is still applied for the rest of that turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19631&keyword=&tag=-1

Q: Qliphort Down is activated and Special Summoned by its own effect. In this situation, if my opponent activates Book of Moon and changes Qliphort Down to face-down Defense Position, can it still be treated as 3 Tributes for the Tribute Summon of an “Apoqliphort” monster?
A: In this scenario, if a Qliphort Down Special Summoned by its own effect is targeted with Book of Moon, it will remain in the Monster Zone in face-down Defense Position. At this time, the effect that allows it to be treated as 3 Tributes for the Tribute Summon of an “Apoqliphort” monster is no longer applied. (Even if Qliphort Down is flipped face-up again, it cannot be treated as 3 Tributes for the Tribute Summon of an “Apoqliphort” monster.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19675&keyword=&tag=-1

Q: My opponent activates Compulsory Evacuation Device, and a face-up Wangtianhou, Origin of the Yang Zing on my field is returned to the Extra Deck. If I activate its effect that Special Summons a “Yang Zing” monster from my Deck, but Nine Branches of the Yang Zing is chained, how does it resolve?
A: If you have a “Yang Zing” card on your field, you can chain Nine Branches of the Yang Zing to the effect of Wangtianhou, Origin of the Yang Zing that activates in the Extra Deck. Since Nine Branches of the Yang Zing negates the activation of the effect of Wangtianhou, Origin of the Yang Zing while it is face-down in the Extra Deck, it cannot be returned to the Deck. Therefore, you do not destroy another “Yang Zing” card on your field.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19517&keyword=&tag=-1

Q: If a Deskbot 006 is destroyed while in the Pendulum Zone, and its effect is activated, can I chain Nine Branches of the Yang Zing?
A: If you have a “Yang Zing” card on your field, you can chain Nine Branches of the Yang Zing to the effect of Deskbot 006 that activates in the Extra Deck. When Nine Branches of the Yang Zing negates the activation, Deskbot 006 is returned from the Extra Deck to the Main Deck, and you are then able to destroy another “Yang Zing” card on your field.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19518&keyword=&tag=-1

Q: Dimensional Barrier was activated by declaring Ritual Monsters. In this situation, if a face-up Amorphactor Pain, the Imagination Dracoverlord on my field is sent to the Graveyard, and I activate its effect that Special Summons a “Dracoverlord” monster from my hand or Deck, is that effect negated?
A: The effect of Dimensional Barrier negates the effects of the declared monster type as long as they remain face-up on the field. In this scenario, if the effect of Amorphactor Pain, the Imagination Dracoverlord is activated when it is sent from the field to the Graveyard, even if Dimensional Barrier was activated by declaring Ritual Monsters, the effect is not negated.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19594&keyword=&tag=-1

Q: Dimensional Barrier was activated by declaring Fusion Monsters. In this situation, if I activate the effect of ABC-Dragon Buster that Special Summons 3 of my LIGHT Machine-Type Union monsters by Tributing it, is that effect negated?
A: The effect of Dimensional Barrier negates the effects of the declared monster type as long as they remain face-up on the field. In this scenario, if the effect of ABC-Dragon Buster is activated by Tributing it, even if Dimensional Barrier was activated by declaring Fusion Monsters, the effect is not negated.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19595&keyword=&tag=-1

Q: Dimensional Barrier was activated by declaring Xyz Monsters. In this case, if Forbidden Lance is activated by targeting an Xyz Monster whose effects are being negated by Dimensional Barrier, what happens to its effects?
A: The effect of Dimensional Barrier negates the effects of the declared monster type as long as they remain face-up on the field, but if Forbidden Lance is activated so that a monster becomes unaffected by Spell/Trap effects, its effects are no longer negated. (It does not matter if Dimensional Barrier was resolved before or after Forbidden Lance.)

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19597&keyword=&tag=-1

Q: Dimensional Barrier was activated by declaring Synchro Monsters. In this case, if a Synchro Monster that was in face-down Defense Position prior to the activation of Dimensional Barrier is flipped face-up, what happens to its effects?
A: After Dimensional Barrier is activated, even if a monster with the declared monster type that was Set on the field is flipped face-up afterward, its effects will be negated by Dimensional Barrier.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19596&keyword=&tag=-1

Q: Dimensional Barrier was activated by declaring Fusion Monsters. In this situation, if my Beatrice, Lady of the Eternal is destroyed by my opponent’s card, can I activate its effect and Special Summon a Dante, Pilgrim of the Burning Abyss ignoring the Summoning conditions?
A: In this scenario, if Dimensional Barrier was activated by declaring Fusion Monsters, neither player can Special Summon Fusion Monsters this turn, including by ways other than Fusion Summons. Therefore, if Beatrice, Lady of the Eternal is destroyed by your opponent’s card, you cannot activate her effect unless you have a “Burning Abyss” monster in your Extra Deck other than a Fusion Monster.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19593&keyword=&tag=-1

Q: The effect of Summon Gate is applying. While I have not Special Summoned any monsters from my Extra Deck this turn, I activate the effect of Cyber-Stein and Special Summon a Fusion Monster from my Extra Deck. In this case, how many more monsters can I Special Summon from my Extra Deck this turn?
A: The effect of Summon Gate is not limited to monsters being properly Special Summoned from the Extra Deck by Fusion Summons, Synchro Summons, etc., and also applies to monsters being Special Summoned by the effects of cards like Cyber-Stein. Therefore, in this scenario, if you used the effect of Cyber-Stein when you had not yet Special Summoned any monsters from your Extra Deck this turn, you are still able to Special Summon up to 2 monsters from your Extra Deck this turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19591&keyword=&tag=-1

Q: The effect of Summon Gate is applying. While I have not Special Summoned any monsters from my Extra Deck this turn, I attempt to Pendulum Summon 2 monsters from my Extra Deck. At this time, Solemn Judgment is activated, and the Pendulum Summon is negated. In this case, how many monsters can I Special Summon from my Extra Deck this turn?
A: If a Pendulum Summon is negated by Solemn Judgment, no monsters were Special Summoned from the Extra Deck. In this situation, since you have not Special Summoned any monsters from your Extra Deck this turn, you are still able to Special Summon up to 3 monsters from your Extra Deck this turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19592&keyword=&tag=-1

Q: The effect of Summon Gate is applying. While I have not Special Summoned any monsters from my Extra Deck this turn, I activate Polymerization, but Solemn Judgment is chained and the activation is negated. In this case, how many monsters can I Special Summon from my Extra Deck this turn?
A: If the activation of Polymerization was negated by Solemn Judgment, no monster was Special Summoned from the Extra Deck by its effect. In this situation, since you have not Special Summoned any monsters from your Extra Deck this turn, you are still able to Special Summon up to 3 monsters from your Extra Deck this turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19674&keyword=&tag=-1

Q: This turn, I have not Special Summoned any monsters from my Extra Deck, but my opponent Pendulum Summoned 3 monsters from their Extra Deck. This turn, if Summon Gate is activated, how many monsters can each player Special Summon from their Extra Deck this turn?
A: While the effect of Summon Gate is applying, the total number of monsters a player can Special Summon from the Extra Deck this turn becomes 3. In this scenario, since your opponent already Pendulum Summoned 3 monsters from their Extra Deck this turn, they will not be able to Special Summon any more monsters from the Extra Deck this turn due to the effect of Summon Gate. On the other hand, since you have not Special Summoned any monsters from your Extra Deck this turn, you are still able to Special Summon up to 3 monsters from your Extra Deck this turn.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19672&keyword=&tag=-1

Q: This turn, I already Special Summoned 3 monsters from my Extra Deck. If I activate Pendulum Reborn, but Summon Gate is chained, how does Pendulum Reborn resolve?
A: In this scenario, even though the effect of Summon Gate is applying, Pendulum Reborn is still resolved. In this case, since you already Special Summoned 3 monsters from your Extra Deck this turn, you cannot Special Summon a Pendulum Monster from your Extra Deck with the effect of Pendulum Reborn. Therefore, if there is a Pendulum Monster in your Graveyard that you can Special Summon, you must Special Summon it, but otherwise the effect of Pendulum Reborn cannot be applied.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19673&keyword=&tag=-1

Q: I activate Present Card, but my opponent chains Full Salvo and discards their entire hand. In this case, how is the effect of Present Card applied?
A: In this scenario, if your opponent chains Full Salvo to your Present Card, your opponent’s hand will have 0 cards left in it, so your opponent cannot discard their hand by the effect of your Present Card. In this case, your opponent will not be able to draw 5 cards afterward.

Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=5&fid=19671&keyword=&tag=-1

Redshift

Number VI of The Organization, Redshift is a firm believer that the toilet paper should be pulled outward from the top of the roll, not the bottom.

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