acidic blast

You point at a location within range, and a glowing, 1-foot-diameter ball of emerald acid streaks there and explodes in a 20-foot-radius sphere. Each creature in that area must make a Dexterity saving throw. On a failed save, a creature takes 5d6 acid damage and another 5d6 acid damage at the end of its next turn for the next 4 turns. On a successful save, a creature takes half the initial damage and no damage at the end of its next turn. Victims can stop the acid damage earlier if they can find a way to dilute the acid significantly

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d6 for each slot level above 4th.