Acid Rain

Until the spell ends, acidic fall in a 20-foot-tall cylinder with a 40-foot radius centered on a point you choose within range. The area is heavily obscured, and exposed flames in the area are doused.

The acidic precipitation slowly eats away at everything it covers. Whenever a creature ends its turn within the area it must make a Dexterity saving throw. On a failed save the creature is covered in acid and takes 6d4 acid damage, or half as much on a success. A creature covered in acid from this spell takes 2d4 acid damage at the start of its turn, unless it or another creature uses an action to scrape or clean off the acid.