Mystic Delta
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, Mystic Delta deals 1 damage to you.

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

Tap, Sacrifice a Swamp: Add BB to your mana pool.

Steve Pollack