Ulamog, The Eternal Terror

Indestructible, Wastewalk, Devoid
Affinity for nonland colorless permanent.
Whenever you annihilate a card, search your
library for an Eldrazi or Spawn card and
annihilate it. Then shuffle your library.
At the beginning of your upkeep, choose a card
in exile with a void counter. You may play this
card until end of turn.