Number 1: Infection Baal Zebul

3 Level 8 monsters
When this card is Xyz Summoned: You can send 1 monster from your opponent's Extra Deck to the Graveyard. Cannot be destroyed by battle except with "Number" monsters. Once per turn: You can attach 1 "Number" monster from your opponent's Graveyard to this card as an Xyz Material. Once per turn: You can detach 1 Xyz Material from this card, then target 1 card your opponent controls; destroy that target, and if you do, if that card was a monster, inflict damage to your opponent equal to the destroyed monster's ATK on the field.