Emrakul, Aeons Compleat

Flying, Infect
Hexproof from players that have Poison Counters.
Emrakul has Annihilator X, where X is the number of poison counters on defending player.
When you cast Emrakul, Aeons Compleat, each opponent sacrifices a permanent for each poison counter on that player.
If Emrakul, Aeons Compleat would be put into a graveyard from anywhere, shuffle your graveyard into your library.