Normal: Your Words transform the nature of the air, turning it from harmless gas into into a swirling mass of harmful energy.

When you speak the utterance, you choose one type of energy: acid, cold, electricity or fire. All creatures in the area take 1d6 per two caster level points of energy damage of the chosen energy type at the start of each of your turns.

Reverse: Your Words transform the nature of the air, causing it to grant protection from harmful energy.

When you speak the utterance, you choose one type of energy: acid, cold, electricity or fire. All creatures in the area have resistance 10 to that type of energy.