Moonring Palace
Land (Rare)

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

UB, Tap: Add UU, UB or BB to your mana pool.

1: Moonring Palace becomes a 2/2 blue Faerie Crab creature until end of turn. It's still a land.

Allan Tedin