AcidBlast

A bright streak flashes from your pointing finger to a point you choose within range and then blossoms with a low roar into an explosion of green acid. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 12d6 Acid damage on a failed save, or half as much damage on a successful one.

The acid spreads around corners. everyone within 100 ft must succeed a DEX save or take full damage

At Higher Levels. When you cast this spell using a spell slot of 9th level or higher, the damage increases by 1d6 for each slot level above 8th.