Deus Empithon

You set yourself ablaze with lightning and dash through enemies in a line. The enemies must take a dexterity save, then the enemies takes 4d6 lightning damage and 4d6 radiant damage on a failed save, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the lightning damage or the radiant damage (your choice) increases by 1d6 for each slot level above 3rd.