A violent eruption of red lightning forming a line 120 feet long and 5 feet wide blasts out from you in a direction you choose. Each creature in the line must succeed on a Dexterity saving throw. On a failed save, a creature takes 3d10 Lightning damage and 3d10 Necrotic damage. On a successful save, a creature takes half damage.
The blast from this spell is so powerful that you must succeed on a Strength saving throw against your own spell save DC. On a failed save, you are pushed 10 feet in a straight line in the opposite direction you cast this spell. If you fail your save by 5 or more, you are also knocked Prone.

At Higher Levels. When you cast this spell using a 4th–level spell slot, the Lightning and Necrotic damage each increases by 1d10, the range increases by 10 feet, and you are pushed back an additional 5 feet for each slot level above 3rd–Level.