Destructive Lightning Bolt of Herasy

The gods anger at the disregard for their gifts. A lighting bolt strikes you from the heavens. Utilizing the gods destructive wrath, you turn it against your foes.

A stroke of lightning forming a line 100 feet long and 5 feet wide blasts out from you in a direction you choose. Each creature in the line must make a Dexterity saving throw. A creature takes 8d6 lightning damage on a failed save, or half as much damage on a successful one. You suffer 2d8 Lighting damage as you cast this spell.

The lightning ignites flammable objects in the area that aren't being worn or carried.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd. The self inflicted damage increases by 1d8.