Crater Rainforest
Land-Mountain Forest (Rare)

(Tap: Add R or G to your mana pool.)

At the beginning of your upkeep, Crater Rainforest deals 2 damage to target creature you control.

2G: Crater Rainforest becomes a 2/2 red and green Elemental creature with trample until end of turn. It's still a land.

Chippy Grant West