Mire Heights
Land-Plains Swamp (Rare)

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

Mire Heights enters the battlefield tapped unless you control two or more monocolored permanents.

BB, Tap, Sacrifice Mire Heights: Put a -1/-1 counter on target creature.

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

Greg Myrfors