Chain Lightning

Range: 150 feet
Components: V, S, M (A bit of fur; a piece of amber, glass, or a crystal rod; three silver pins)
You create a bolt that arcs toward a target. Three
bolts leap from that target to up to three others (creature or object) within 30 feet of the first.
One bolt per target. The target makes a Dexterity
saving throw, and takes 10D8 {r/g}damage on a
failed save, half on a success.
At Higher Levels: one additional bolt leaps from
the first target for each spell slot above 6th.