Dread Lightning

You shoot bolts of blue electricity from your fingertips that arch out and hit one creature of your choice within range. Make a ranged spell attack against the target. On a hit, the creature is electrified by the dread lightning, taking 4d6 lightning damage, and 4d6 necrotic damage. the target must then make a constitution saving throw contested by your spell save dc+ your spellcasting ability modifier. On a failed save, the target falls prone, is vulnerable to all nonmagical damage and becomes incapacitated. on a succesful save, the target does not suffer any of the previously listed effects (other than this spell's damage). You may concentrate to deal this damage each turn for up to 6 rounds. While you are concentrating in this way, you cannot take any bonus actions, reactions, or actions (except to continue concentrating). You also become deaf until the spell ends.