Dark Circuit

You create a bolt of red, life-consuming lightning that arcs toward a target of your choice that you can see within range. Three bolts then leap from that target to as many as three other targets, each of which must be within 20 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 4d6 lightning damage and 4d6 necrotic damage on a failed save, or half as much damage on a successful one. The target also restores half health from magical healing. Undead and constructs take only half of the normal necrotic damage, and do not receive lesser healing.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the lightning or necrotic damage (your choice) increases by 1d6 for each slot level above 3rd.