Crag-wood
Land (Rare)

When Crag-wood enters the battlefield, sacrifice it unless you pay 1 life.

Tap, Pay 1 life: Add R or G to your mana pool.

1, Tap, Sacrifice Crag-wood: Draw a card.

2G: Crag-wood becomes a 2/2 red and green Dwarf creature with trample until end of turn. It's still a land.

Ron Nielsen