Treetop Everglades
Land (Rare)

At the beginning of your end step, if you didn't cast any spells this turn, Treetop Everglades deals 1 damage to you.

BG, Tap: Add GG, GB or BB to your mana pool.

2G: Treetop Everglades becomes a 2/2 black and green Bear Beast creature with trample until end of turn. It's still a land.

Steve Pollack