Shambling Vent is a rare Land card from Edge of Eternities: Stellar Sights (EOS), collector number 83. Current market price: $1.82 (foil $2.34), TCGplayer market prices via Scryfall.
This land enters tapped. {T}: Add {W} or {B}. {1}{W}{B}: Until end of turn, this land becomes a 2/3 white and black Elemental creature with lifelink. It's still a land.