Overgrown Tar Pit
Land-Swamp Forest (Rare)

(Tap: Add B or G to your mana pool.)

When Overgrown Tar Pit enters the battlefield, sacrifice it unless you pay B.

2GG, Tap: Put a 2/2 green Bear creature token onto the battlefield.

Tap, Sacrifice a Swamp: Add BB to your mana pool.

John Briclot