Insatiable Hemophage is a uncommon Creature — Nightmare card from Ikoria: Lair of Behemoths (IKO), collector number 93. Current market price: $0.22 (foil $0.25), TCGplayer market prices via Scryfall.
Mutate {2}{B} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.) Deathtouch Whenever this creature mutates, each opponent loses X life and you gain X life, where X is the number of times this creature has mutated.