Grave Hollows
Land-Swamp Forest (Rare)

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

Grave Hollows enters the battlefield tapped unless you control five or more multicolored permanents.

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

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

Kev Prescott