Evilswarm Bahamut

Rank 4 DARK/Dragon XYZ Monster
2350 ATK / 1350 DEF

2 Level 4 "lswarm" monsters
Once per turn: You can detach 1 Xyz Material from this card to target 1 face-up monster your opponent controls; discard 1 "lswarm" monster, and if you do, take control of that opponent's monster.

Rulings – Yugipedia

Printings:

Duel Terminal 7a: DT07-EN040 (Duel Terminal Ultra Parallel Rare) - 2012-09-28
Hidden Arsenal 7: Knight of Stars: HA07-EN024 (Secret Rare) - 2013-04-26

Prices:

Cardmarket: 1.35 €
TCGplayer: $ 0.75