Acid Bath

You toss a drop of acid to a point you choose within range, and it then expands and rapidly floods the area. This acid will go around corners but not through total cover. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. Each target takes 6d6 acid damage be blinded for 1 minute on a failed save, or half as much damage and no blindness on a successful save. The creature can make a constitution saving throw at the end of each turn to end the blindness.

Monsters mad of rust take double damage from this spell.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage 1d6 acid for each slot level above 3rd.