Mire Fountain
Land-Island Swamp (Rare)

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

Mire Fountain enters the battlefield tapped.

BB, Tap, Sacrifice Mire Fountain: Put a -1/-1 counter on target creature.

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

Rebecca Pollack