Moonring Bosk
Land-Island Swamp (Rare)

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

When Moonring Bosk enters the battlefield, you lose 1 life unless you reveal a Faerie card from your hand.

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

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

Steve Briclot