Creeping Tar Pit is a rare Land card from Commander Legends: Battle for Baldur's Gate (CLB), collector number 888. Current market price: $0.37, TCGplayer market prices via Scryfall.
This land enters tapped. {T}: Add {U} or {B}. {1}{U}{B}: Until end of turn, this land becomes a 3/2 blue and black Elemental creature. It's still a land. It can't be blocked this turn.
All Commander Legends: Battle for Baldur's Gate cards and prices