Battlefield Timberland
Land (Rare)

Battlefield Timberland enters the battlefield tapped unless you control five or more creatures.

Tap: Add R to your mana pool. If you played a land this turn, Add G to your mana pool instead.

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

James Spencer