Palace Ruins
Land-Island Swamp (Rare)

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

Palace Ruins enters the battlefield tapped unless you pay 1.

BB, Tap, Sacrifice Palace Ruins: Put a -1/-1 counter on target creature.

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

Steve Grant West