Flagstones Reef
Land-Plains Island (Rare)

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

When Flagstones Reef enters the battlefield, sacrifice it unless you pay U.

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

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

Douglas Pollack