Spawnsire of Ulamog #11

Annihilator 1 (Whenever this creature attacks, defending player sacrifices a permanent.) 4: Put two 0/1 colorless Eldrazi Spawn tokens onto the battlefield. They have "Sacrifice this creature: Add 1 to your mana pool." 20: Cast any number of Eldrazi cards you own from outside the game without paying their mana costs.