Electrokinesis

Crackling green energy surges forth from your fingertips and traps an enemy in an electrical bind.

Target an enemy in range and force them to make a Dexterity saving throw. On a failed save, they will become incapacitated and take 2d6 lightning damage. As long as the user maintains concentration they can continue to keep the target incapacitated. As an action, the user can move the target to a location within 30 feet of the user, but doing this will break concentration. Once concentration ends, the remaining force from the spell will zap the target and deal 1d4 lightning damage. 

At 6th level the last zap of damage will become 2d4, at 10 level it'll do  3d4, at 14 level it'll do 4d4, and at 18 level it'll do 5d4.