Electrostasis

You reach out, releasing a bolt of cracking energy that can blast into a creature possibly locking it's muscles. The creature must succeed on a Constitution Saving Throw or become Stunned for the duration of your concentration, up to 1 minute.
On following turns, you may use your Action to deal 1d8 Lightning damage to the target. The creature may repeat the Saving Throw at the end of its following turns.
If you move farther than 60ft. from the target, the spell ends.