Creeping Tar Pit [Worldwake]

Set: Worldwake Type: Land Rarity: Rare Creeping Tar Pit enters the battlefield tapped.{T}: Add {U} or {B}.{1}{U}{B}: Creeping Tar Pit becomes a 3/2 blue and black Elemental creature until end of turn and can't be blocked this turn. It's still a land.