Slivdrazi Monstrosity is a rare Legendary Creature — Sliver Eldrazi card from Magic: The Gathering (Mystery Booster Playtest Cards 2021, CMB2). Current market price: $12.85.
Eldrazi you control are Slivers in addition to their other types.
Slivers you control have devoid and annihilator 1.
{3}: Create a 1/1 colorless Eldrazi Sliver creature token. It has "Sacrifice this creature: Add {C}."
