The serpentine spark takes the form of 5 line segments, each 5x10 feet, that may bend and twist (up to 90° between two segments) but must connect end-to-end. Any creature caught in this path must make a dexterity saving throw, taking 6d10 Lightning damage on a failed save, or half as much on a successful one. If a creature is caught in the path twice, it has disadvantage on the saving throw and takes an additional 3d10 Lighting damage on a failed save.