Energy Vortex

Level: 2
Duration: 1 minute
Your words transform the nature of the air, turning it from harmless gas into a swirling mass of harmful energy.
You fill the air around your foes with energy, dealing damage. You choose the type of damage to deal when you speak this utterance: acid, cold, electricity, or fire. Creatures in the affected area take 2d6 points of energy damage per caster level, and an additional 2d6 points of damage at the beginning of each of their turns while they remain in the area.