Discharge

You spend your action building up electrical energy to be expelled on your next turn. While concentrating on this spell your movement is 0. On your next turn you may use your action to discharge this energy in a 40ft cone. All creatures within the 40ft cone must make a Dex Saving throw od take 23d6 lightning dmg, taking half that on a success. After you do so, the spell ends. If you lose or drop concentration on this spell before it ends or do not use your action to discharge the energy on your following turn, you take half the damage a creature would receive on a failed save as the energy is discharged into you.