Ichor Rats is a uncommon Creature — Phyrexian Rat card from Phyrexia: All Will Be One Commander (ONC), collector number 93. Current market price: $4.04, 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, each player gets a poison counter.