a numbah

Number 45: Machine Decay
No. 45 Zombie Machinery - Machine Decay
[Rank 7/EARTH/Machine/Xyz/Effect/3000/2300]
2 Level 7 monsters
During your Main Phase 2, you can also Xyz Summon this card by using a Level 8 or higher monster you control as the Xyz Material. This card is treated as a Zombie-Type monster while on the field or in the Graveyard. Monsters your opponent controls lose 200 ATK for each Machine-Type monster in your Graveyard. Once per turn: You can detach 1 Xyz Material from this card, then activate 1 of the following effects.
● Target 1 of your banished Zombie-Type monsters; Special Summon that target, but destroy it during your End Phase.
● Target 1 Machine-Type monster in your Graveyard and 1 monster your opponent controls; banish the first target, and if you do, shuffle the second target into the Deck.