Wave of Doubt

Waves of energy erupt from your fingertips in a 15-foot cone. Each creature in that area must make a Intelligence saving throw, taking 2d8 Psychic damage on a failed save, or half as much damage on a successful one.  Crushing waves of doubt as mind is assailed with a multitude of possibilities of the immediate future.  Undead and creatures of Int 3 or lower are immune.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.