Hydaelyn

Release a blast of psychic energy from your mouth. All creatures in a 15ft. cone make an Intelligence saving throw against your Spell Save DC. On a failure, they become stunned for 1 minute and take #d8 psychic damage, where # is equal to the level of the spell slot spent. On a success they take half as much damage and are not stunned. They may repeat the save as an action on their turn.