[PP18] Number 77: The Seven Sins

2 Level 12 monsters
You can also Xyz Summon this card by using a Rank 10 or Rank 11 DARK Xyz Monster you control as the Xyz Material. (Xyz Materials attached to that monster also become Xyz Materials on this card.) Once per turn, except the turn this card was Summoned this way: You can detach 2 Xyz Materials from this card; banish as many Special Summoned monsters your opponent controls as possible, and if you do, attach 1 of those banished monsters to this card as an Xyz Material. If this face-up card on the field would be destroyed by battle or card effect, you can detach 1 Xyz Material from this card instead.