Viridian Corrupter is a uncommon Creature — Phyrexian Elf Shaman card from Phyrexia: All Will Be One Commander (ONC), collector number 113. Current market price: $0.78, TCGplayer market prices via Scryfall.
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) When this creature enters, destroy target artifact.