Overgrown Tomb is a rare Land — Swamp Forest card from Ravnica Remastered (RVR), collector number 296. Current market price: $14.68 (foil $28.27), TCGplayer market prices via Scryfall.
({T}: Add {B} or {G}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.