Acidball

A dark green beam flows from your pointing finger to a point you choose within range and then blossoms with a surging into an crest of acid that flows outward before dissapering. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 8d6 acid damage on a failed save, or half as much damage on a successful one.

The acid spreads around corners. It melts small objects in the area that aren't being worn or carried.

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