The Great Expanse

Conjuration Cast Time: 1 Action Range: 150 feet Components: V, S, M (a vial of acid) Duration: Concentration, up to 1 minute A corrosive storm forms over a 20-foot-radius area. Each creature in the area must make a Dexterity saving throw. On a failed save, they take 6d10 acid damage and suffer a -6 penalty to AC for the duration. On a success, they take half as much damage and no penalty.