Mystic Verge
Land-Plains Island (Rare)

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

Mystic Verge enters the battlefield tapped.

U, Tap, Sacrifice Mystic Verge: Return target creature you control to its owner's hand.

2, Tap: Target land becomes a 3/3 white Citizen Knight creature until end of turn. It's still a land.

Lars Walker