Vat of Rebirth is a uncommon Artifact card from Phyrexia: All Will Be One (ONE), collector number 113. Current market price: $0.33 (foil $0.39), TCGplayer market prices via Scryfall.
Whenever another artifact or creature you control is put into a graveyard from the battlefield, put an oil counter on this artifact. {2}{B}, {T}, Remove four oil counters from this artifact: Return target creature card from your graveyard to the battlefield. Activate only as a sorcery.