Fungal Heath
Land (Rare)

When Fungal Heath enters the battlefield, sacrifice it unless you pay 3 life.

G, Tap: Add WW to your mana pool.

W, Tap: Add GG to your mana pool.

2G: Fungal Heath becomes a 2/2 green and white Elf creature with trample until end of turn. It's still a land.

Greg Sweet