D/D/D Super Doom King Dark Armageddon

2 Level 8 "D/D/D" monsters Cannot be Pendulum Summoned. When this card is Xyz Summoned: You can attach 1 face-up "D/D" Pendulum Monster from your Extra Deck to this card as material. Pendulum Monsters you control cannot be destroyed by card effects. Once per turn: You can detach 1 material from this card, then target monsters your opponent controls, equal to the number of Pendulum Monsters you control; destroy them. If this card in the Monster Zone is destroyed: You can place this card in your Pendulum Zone.