You can only control 1 ""Nefarious Archfiend Eater of Nefariousness"". If you control a Spellcaster-Type monster, you can Special Summon this card (from your hand). During your opponent's End Phase, if this card is in your Graveyard: You can target 1 face-up monster you control; destroy it, and if you do, Special Summon this card.