Horizon Key
Land-Plains Island (Rare)

(Tap: Add W or U to your mana pool.)

Horizon Key enters the battlefield tapped unless you control four or more creatures.

WW: Prevent the next 1 damage that would be dealt to target creature or player this turn.

1, Tap: Target land becomes a 2/2 blue Cephalid creature until end of turn. It's still a land.

Allan Prescott