
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 {C}."
{20}: Cast any number of Eldrazi spells from among cards you own outside the game without paying their mana costs.
Spawnsire of Ulamog has 1 printing, first in Rise of the Eldrazi (2010). EDHREC ranks it #11,778 among Commander cards. It appears most in Ulamog, the Defiler decks (208 on EDHREC). It has 5 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.