Carnifex Demon is a rare Creature — Phyrexian Demon card from Scars of Mirrodin (SOM), collector number 57. Current market price: $0.85 (foil $1.23), TCGplayer market prices via Scryfall.
Flying This creature enters with two -1/-1 counters on it. {B}, Remove a -1/-1 counter from this creature: Put a -1/-1 counter on each other creature.