The official site just posted two new Artifact monsters!
Artifact Longinus
Level 5 LIGHT Fairy-Type Effect Monster
ATK 1700
DEF 2300
You can Set this card from your hand to your Spell & Trap Card Zone as a Spell Card.
During your opponent’s turn, when this Set card in your Spell & Trap Card Zone is destroyed and sent to the Graveyard: Special Summon this card from the Graveyard.
During your opponent’s turn: You can Tribute this card from your hand or field; this turn, cards cannot be banished. (This is a Quick Effect)
Artifact Chakram
Level 5 LIGHT Fairy-Type Effect Monster
ATK 1900
DEF 2000
You can Set this card from your hand to your Spell & Trap Card Zone as a Spell Card.
During your opponent’s turn, when this Set card in your Spell & Trap Card Zone is destroyed and sent to the Graveyard: Special Summon this card from the Graveyard.
During either player’s turn, when a card or effect is activated that would destroy a Spell/Trap Card(s) you control: You can return 1 Set Spell/Trap Card you control to the hand; Special Summon this card from your hand.
Source + pics: http://www.yugioh-card.com/japan/topics/?20140228
(Article pretty much says Artifacts are awesome because they work in the opp’s turn, etc.)