Vat Emergence is a uncommon Sorcery card from Phyrexia: All Will Be One (ONE), collector number 112. Current market price: $0.29 (foil $0.39), TCGplayer market prices via Scryfall.
Put target creature card from a graveyard onto the battlefield under your control. Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)