Forbidding Lake
Land (Rare)

Forbidding Lake enters the battlefield tapped unless you control two or more creatures.

Tap: Add WU to your mana pool. Forbidding Lake doesn't untap during your next untap step.

1W: Forbidding Lake becomes a 0/4 white and blue Soldier creature with defender until end of turn. It's still a land.

Allan Palck