Tezzeret's Gambit is a uncommon Sorcery card from Modern Horizons 3 Commander (M3C), collector number 194. Current market price: $0.34, TCGplayer market prices via Scryfall.
({U/P} can be paid with either {U} or 2 life.) Draw two cards, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)