Putrefax is a rare Creature — Phyrexian Horror card from Scars of Mirrodin (SOM), collector number 126. Current market price: $0.34 (foil $0.94), TCGplayer market prices via Scryfall.
Trample, haste Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) At the beginning of the end step, sacrifice this creature.