Acid Storm

This deadly spell unleashes a downpour of magical, gelatinous acid droplets. All creatures within the area of effect are coated by globs of gooey acid. The acid can be washed off only with wine, vinegar, or by a successful dispel magic or similar spell. The acid remains present for 12 rounds, then vanishes. Creatures coated by the acid suffer 1d8 hit points of damage each round. Characters who successfully CON save first round suffer only half damage from the acid for the remaining rounds. When the spell expires, no further damage is inflicted.