Spawnsire of Ulamog [Rise of the Eldrazi]

Set: Rise of the Eldrazi Type: Creature — Eldrazi Rarity: Rare Cost: {10} Annihilator 1 (Whenever this creature attacks, defending player sacrifices a permanent.){4}: Create two 0/1 colorless Eldrazi Spawn creature tokens. They have "Sacrifice this creature: Add {C}."{20}: Cast any number of Eldrazi spells from among cards you own outside the game without paying their mana costs.