Ghostrick Warwolf

[ Zombie / Effect ] Cannot be Normal Summoned, unless you control a "Ghostrick" monster. Once per turn: You can change this card to face-down Defense Position. When this card is flipped face-up: Inflict 50 damage to your opponent for each Set card on the field. You can only use this effect of "Ghostrick Warwolf" once per turn. ATK/ 1400 DEF/ 1500