Outpost Cavern
Land-Plains Swamp (Rare)

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

Outpost Cavern enters the battlefield tapped.

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

BB, Tap, Sacrifice Outpost Cavern: Put a -1/-1 counter on target creature.

Steve Myrfors