Mystic Catacombs
Land-Island Swamp (Rare)

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

Mystic Catacombs enters the battlefield tapped unless you control two or more creatures.

1, Tap: Target land becomes a 2/2 blue Wizard creature until end of turn. It's still a land.

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

Ron Schuler