Gagaga Cowboy (ABYR-EN041) - Abyss Rising Unlimited

2 Level 4 monsters // Once per turn: You can detach 1 Xyz Material from this card; apply this effect depending on this card's battle position. // * Attack Position: If this card attacks an opponent's monster this turn, it gains 1000 ATK and the opponent's monster loses 500 ATK, during the Damage Step only. // * Defense Position: Inflict 800 damage to your opponent.