Coral Tubes
Land-Island Swamp (Rare)

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

Coral Tubes enters the battlefield tapped.

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

BB, Tap, Sacrifice Coral Tubes: Put a -1/-1 counter on target creature.

Christopher Grant West