Cannot be Normal Summoned or Set. Must be Special Summoned by Yubel . Cannot be destroyed by battle. You take no battle damage from battles involving this card. Before damage calculation, if this face-up Attack Position card is targeted for an attack: Inflict damage to your opponent equal to that attacking monster s ATK. Once per turn, during your End Phase: Destroy all other monsters on the field. When this face-up card leaves the field: You can Special Summon 1 Yubel – The Ultimate Nightmare from your hand, Deck, or GY.