Mystic Forest
Land (Rare)

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

Tap: Add U to your mana pool. Activate this ability only if you control an Island.

Tap: Add G to your mana pool. Activate this ability only if you control a Forest.

2G: Mystic Forest becomes a 2/2 green and blue Shapeshifter creature with trample until end of turn. It's still a land.

Christopher Avon