Rootwater Moor
Land-Island Swamp (Rare)

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

When Rootwater Moor enters the battlefield, sacrifice it unless you pay U.

2, Tap: Target land becomes a 3/3 blue Crab Shapeshifter creature until end of turn. It's still a land.

B, Tap, Pay 1 life: Put a 1/1 black Horror creature token onto the battlefield.

Justin Myrfors