Chaos Lightning

You create a bolt of lightning that arcs toward a target of your choice that you can see within range. 10 bolts then leap from that target to as many as three other targets, each of which must be within 75 feet of the first target. A target can be a creature or an object and can be targeted by only one of the bolts.

A target must make a Dexterity saving throw. The target takes 12d10 lightning damage and 12d10 necrotic damage on a failed save, or half as much damage on a successful one.