Some Ninjas, and some Shenanigans.
DABL-EN015 Tobari the Sky Ninja
Level 1 EARTH Winged-Beast/Effect 0/0
This card cannot be destroyed by battle or card effect the turn it was Special Summoned or flipped face-up. You can only use each effect of “Tobari the Sky Ninja” once per turn. You can send this card from your hand to the GY; Special Summon 1 “Ninja” monster from your hand in face-up or face-down Defense Position. During your opponent’s Main or Battle Phase (Quick Effect): You can Fusion Summon 1 “Ninja” Fusion Monster from your Extra Deck, using monsters from your hand or field as material.
DABL-EN016 Mitsu the Insect Ninja
Level 2 WATER Insect/Effect 200/2100
If you control a “Ninja” or a face-down Defense Position monster: You can Special Summon this card from your hand. When your opponent activates a monster effect (Quick effect): You can target 1 face-down Defense Position monster you control; change it to face-up Defense Position, and if you do, change this card to face-down Defense Position, then, if the targeted monster was a “Ninja” monster, except “Mitsu the Insect Ninja”, negate that opponent’s activated effect. You can only use each effect of “Mitsu the Insect Ninja” once per turn.
DABL-EN017 Baku the Beast Ninja
Level 3 EARTH Beast/Effect 1500/600
If this card is added to your hand, except by drawing it: You can Special Summon it. If this card is Special Summoned or flipped face-up: You can target 1 “Ninja” or “Ninjitsu Art” card from your GY or face-up Spell & Trap Zone, except “Baku the Beast Ninja”; Return it to the hand. You can only use each effect of “Baku the Beast Ninja” once per turn.
DABL-EN018 Kagero the Cannon Ninja
Level 4 FIRE Warrior/Effect 1600/2000
If this card is Normal Summoned, Special Summoned, or flipped face-up: You can Special Summon 1 “Ninja” monster from your hand or GY in face-down Defense Position, except “Kagero the Cannon Ninja”. When your opponent activates a card or effect that targets exactly 1 “Ninja” card or exactly 1 face-down Defense Position monster you control, while this card is in your GY (Quick Effect): You can Special Summon this card in face-down Defense Position, and if you do, return that targeted card to the hand. You can only use each effect of “Kagero the Cannon Ninja” once per turn.
DABL-EN040 Meizen the Battle Ninja
Level 6 DARK Warrior/Fusion/Effect 2500/1500
2 “Ninja” monsters with different Types
Must first be either Fusion Summoned, or Special Summoned from your Extra Deck by Tributing the above cards you control, Your “Ninja” monsters can attack directly. While you control a face-down Defense Position monster, your opponent’s monsters cannot target this card for attacks. When your opponent activates a card or effect (Quick Effect): You can Special Summon 1 “Ninja” monster from your Deck in face-up or face-down Defense Position. You can only use this effect of Meizen the Battle Ninja once per turn.
DABL-EN061 Ninjitsu Art Notebook of Mystery
Quick-Play Spell
If your opponent controls a card: You can Set up to 1 “Ninja” monster and up to 1 “Ninjitsu Art” Spell/Trap, except “Ninjitsu Art Notebook of Mystery”. These cards come from your Deck and/or GY, but only 1 can come from each. If this Set card on the field is sent to the GY: You can target 1 face-up monster on the field; change it to face-down Defense Position. You can only use each effect of “Ninjitsu Art Notebook of Mystery” once per turn.
DABL-EN062 Nijitsu Art Tool – Iron Digger
Equip Spell
The equipped monster gains 500 ATK, also it is treated as a “Ninja” mosnter. You can only use each of the following effects of “Nijitsu Art Tool – Iron Digger” once per turn. You can banish 1 “Ninja” monster from your GY, then target 1 card on the field; destroy it. If this card is sent from the field to the GY: You can target 1 of your banished “Ninja” monsters; add it to your hand or Special Summon it in face-down Defense Position.
DABL-EN077 Ninjitsu Art of Dancing Leaves
Continuous Trap
Activate this card by targeting 1 “Ninja” monster or 1 face-down Defense Position monster on the field; Tribute it, and if you do, Special Summon 1 “Ninja” monster from your Deck. When this card leaves the field, send that monster to the GY. You can target 1 “Ninjitsu Art” continuous Spell/Trap in your Spell & Trap Zone; return it to the hand. You can only use 1 “ninjitsu Art of Dancing Leaves” effect per turn, and only once that turn.
DABL-EN084 Destructive Daruma Karma Cannon
Normal Trap
Change as many monsters on the field as possible to face-down Defense Position, then, if either player controls a face-up monster(s), they must send all face-up monsters they control to the GY.
DABL-END050 Worldsea Dragon Zealantis
WATER Sea Serpent/Link/Effect 2500/LINK-4
1+ Effect Monsters
You can only control 1 “Worldsea Dragon Zealantis”. You can only use each of the following effects of “Worldsea Dragon Zealantis” once per turn. During your Main Phase: You can banish all monsters on the field, then Special Summon as many monsters as possible that were banished by this effect, to their owners’ fields, face-up, or in face-down Defense Position. During the Battle Phase (Quick Effect): You can destroy cards on the field up to the number of co-linked monsters on the field.