Infernity Conjurer (PHRA-EN016) - Phantom Rage 1st Edition

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.