Unstable Rainforest
Land-Mountain Forest (Rare)

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

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

1R: Unstable Rainforest becomes a 1/1 red and green Ape Ogre creature with first strike until end of turn. It's still a land.

Ron Walker