Ulamog, Destroyer of Hope

Indestructible
Whenever you cast Ulamog, Destroyer of Hope enters the battlefield, choose one-
-Ulamog, Destroyer of Hope has Annihalator 7.
Or-
-Target player exiles the top 20 cards of his or her library.
"When I saw Ulamog draw near, I knew that all hope was lost." -Gamril, Defender of Bahzmeer