Ulamog, the Infinite Gyre

Texto de reglas

When you cast Ulamog, the Infinite Gyre, destroy target permanent. Annihilator 4 (Whenever this creature attacks, defending player sacrifices four permanents.) Ulamog is indestructible. When Ulamog is put into a graveyard from anywhere, its owner shuffles his or her graveyard into his or her library.