Acidball

A green streak flashes from you to a point you choose within range and then explodes as a bursting bubble with the sizzling sound of acid dissolving everything it touches . Each creature in a 20-foot-radius Sphere centered on that point makes a Dexterity saving throw, taking 8d6 Acid damage on a failed save or half as much damage on a successful one.

Nonmetallic objects in the area that aren’t being worn or carried start dissolving.

Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 3.