Channeling the Fury of Storms and the Tempest you hold out your hands and unleash a torrent of Lightning.
Any Enemy within the Area of Effect makes a Constitution Saving throw and takes 3d8 or half as much on a success.

Enemies who fail their save take 1d8 + your Spellcasting Modifier additional Lightning Damage at the beginning of their next turn.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.