Flooded Flats
Land-Island Swamp (Rare)

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

When Flooded Flats enters the battlefield, sacrifice it unless you pay U.

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

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

Therese Guay