Chains of Shock

Summons a magical chain(s) covered in lightning to attack your foes. The number of chains must be specified before the use of the spell, and a d20 must be rolled for each chain. The attack deals 1d6 force damage on a successful hit. the target must make a con dc save of 15 or take 1d6 lightning damage. On a successful save, the target takes half of the lightning damage.