Thunder Crash

You imbue yourself with lightning and launch yourself up to 100 ft 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 on a successful one.

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.

(i realize this is similar to lightning bolt. i only posted to public so that i can add the homebrew subclass to public as well. this spell as private makes the option forbidden as it is tied to the Oath Spells list)