Chain Beam

You launch a Beam of light toward a target. five beams then leap from that target to as many as two other targets of your choice, each of which must be within 50 feet of the first target and does half damage. A target can be a creature or an object and can be targeted by only one of the bolts.

Each target makes a Constitution saving throw, taking 6d12 Lightning damage on a failed save or half as much damage on a successful one.