Doctor Who

Creeping Tar Pit

Creeping Tar Pit enters 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.

Commander Legends: Battle for Baldur's Gate

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.

New Capenna Commander

Zendikar Rising Expeditions

Ultimate Masters

Ultimate Box Topper

Worldwake

Creeping Tar Pit enters the battlefield tapped.
{T}: Add {U} or {B} to your mana pool.
{1}{U}{B}: Until end of turn, Creeping Tar Pit becomes a 3/2 blue and black Elemental creature and is unblockable. It's still a land.