Flagstones Pools
Land (Rare)

Flagstones Pools enters the battlefield tapped unless you pay U.

W, Tap: Add UU to your mana pool.

U, Tap: Add WW to your mana pool.

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

Mark Avon