{R} Spawnsire of Ulamog [Rise of the Eldrazi][ROE 011]

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