Synaptic bolt

Your eyes glow a radiant purple as you fire a bolt of similarly glowing plasma that strikes toward a target you can see within range, overloading their minds in an instant. Many arcs then fly from that target to as many targets are within 30 feet of the first target, much like a Tesla coil. A target must be a creature.

A target must make a wisdom saving throw. The target takes 10d8 lightning damage on a failed save, or half as much damage on a successful one. Subsequent targets all take half damage.