Bloated Contaminator is a rare Creature — Phyrexian Beast card from Phyrexia: All Will Be One Promos (PONE), collector number 159s. Current market price: — (foil $4.80), 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.)