Bloated Contaminator is a rare Creature — Phyrexian Beast card from Phyrexia: All Will Be One (ONE), collector number 389. Current market price: $4.56 (foil $4.97), TCGplayer market prices via Scryfall.
Trample Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) Whenever this creature deals combat damage to a player, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)