Eldrazi Conscription is a rare Kindred Enchantment — Eldrazi Aura card from The List (PLST), collector number UMA-3. Current market price: $2.71, TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +10/+10 and has trample and annihilator 2. (Whenever it attacks, defending player sacrifices two permanents of their choice.)