Ghostrick Yuki-onna

[ Spellcaster / 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 destroyed by battle and sent to the Graveyard: You can change the monster that destroyed it to face-down Defense Position, and if you do, it cannot change its battle position. ATK/ 1000 DEF/ 800