Unlimited Power

Bolts of lightning surge from your hand towards a target creature. The target must succeed on a Dexterity saving throw or take 6d10 lightning damage on a failure or half as much on a success. Additionally, if the first save was failed, the target must succeed on a Constitution saving throw against your spell save DC or become stunned. At the end of the target creatures turn they can repeat the saving throw to end the effect and become immune to this condition for 24 hours. The stunned effect ends if concentration on the spell is broken.

At the start of each of your turns, if concentration is maintained, the target takes an additional 4d10 lightning damage. If the target moves out of the 30ft. range, the spell ends. 

If another creature intentionally moves in between the current target and the caster, they become the new target of the spell and must make a Constitution saving throw against your spell save DC and they take 6d10 lightning damage.

"Is it possible to learn this power?"

"Not from a sorcerer."