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

: Add  to your mana pool. Activate this ability only if you control a Mountain.

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

: Molten Oasis becomes a 2/2 red and green Shaman creature with trample until end of turn. It's still a land.