Gagaga Cowboy Super Rare - 2013 Collectors Tins Limited

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.