Verbal Assault

You utter words of power laced with deadly psychic energy. Each creature in a 30-foot-cone must make an Intelligence saving throw. On a failed save, a creature takes 8d6 psychic damage and is stunned until the end of its next turn. On a successful save, a creature takes half the damage and is not stunned.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d6 for each slot level above 4th.