Goblin Heath
Land (Rare)

When Goblin Heath enters the battlefield, sacrifice it unless you pay G.

R, Tap: Add GG to your mana pool.

G, Tap: Add RR to your mana pool.

2G: Goblin Heath becomes a 2/2 red and green Ape creature with trample until end of turn. It's still a land.

Kev Palck