Corrosive Wave

A wave of acidic liquid crashes out from you. Each creature in a 15-foot cube originating from you must make a Dexterity saving throw. On a failed save, a creature takes 6d8 acid damage. On a successful save, the creature takes half as much damage.

In addition, any creature that starts its turn on the ground in the affected area before the start of your next turn takes 4d4 acid damage.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.