Rotting Sea
Land-Island Swamp (Rare)

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

At the beginning of your end step, if you didn't cast any spells this turn, Rotting Sea deals 1 damage to you.

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

U, Tap, Sacrifice Rotting Sea: Return target creature you control to its owner's hand.

Greg Sweet