Acidic Gas

EP Cost: 10+

You create a 20-foot-radius Sphere of corrosive, acidic, gas centered on a point you choose within range. The gas spreads around corners and lasts for the duration or until strong wind disperses the gas, ending the Power. When a creature enters the gas for the first time on a turn or starts its turn there, that creature must make a Constitution saving throw. The creature takes 5d8 acid damage on a failed save, or half as much damage on a successful one. You can move the gas up to 10 ft. in any direction as a free action at the start of your turn. You may increase the damage caused by 1d8 for every additional 2 EP used on this Power.