Ulamog, the Infinite Gyre

When you cast Ulamog, the Infinite Gyre, Adam,
destroy target permanent.
Indestructible
Annihilator 4 (Whenever this creature attacks,
defending player sacrifices four permanents.)
When Ulamog is put into a graveyard from anywhere,
its owner shuffles their graveyard into their library.
Will only attack to protect the world.
Mainly: animals and plants.