Dry Atoll
Land (Rare)

When Dry Atoll enters the battlefield, sacrifice it unless you pay 3 life.

W, Tap: Add UU to your mana pool.

U, Tap: Add WW to your mana pool.

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

Eric Spencer