Infernity Conjurer

[ Fiend / Effect ] While you have no cards in your hand, monsters your opponent controls lose 800 ATK. While you have no cards in your hand and this card is in your GY: You can Special Summon this card, but banish it when it leaves the field. You can only use this effect of "Infernity Conjurer" once per turn. ATK/ 1200 DEF/ 900