Electrify Air

You send electric currents through the air in a 60-foot cube within range. 

Each creature (other than you) in the area when you cast the spell, or at the beginning of its turn, must make a Constitution saving throw. On a failed save, a creature takes 6d10 Lightning damage and has the Paralyzed condition until the end of its turn. On a success, it takes half as much damage and is not Paralyzed. A creature must spend two feet of movement for every foot traveled in the area. You can use your bonus action to end the spell early.

At higher levels, damaged is increased by 2d10 per level above 7th.