Forbidding Sandbar
Land (Rare)

Forbidding Sandbar enters the battlefield tapped unless you pay 1 life.

1, Tap: Add WW, WU or UU to your mana pool. Forbidding Sandbar deals 1 damage to you.

WU: Forbidding Sandbar becomes a 2/1 white and blue Cleric creature until end of turn. It's still a land.

Carl Chan