Voltaic Retribution

You release a surge of electrical power in a 30 foot radius around you. Each creature in that radius must make a Dexterity saving throw. On a failed save, a creature takes 8d8 lightning damage and becomes a conduit for electrical energy. On a successful save, a creature takes half damage and does not become an electrical conduit.

Each creature that has become an electrical conduit then immediately releases an identical surge of electrical energy. You are unaffected by these electrical bursts and a creature can only become an electrical conduit once per casting of the spell but can be damaged multiple times by it however a creature cannot be damaged by the electrical bursts of other creatures in the same wave as it. This spell ends after the fourth wave of creatures have released their electrical energy.