Charge of the Thermonuclear Bison

You raise your axe and let out a roar. A flaming aura in the shape of a blazing bull forms around you as you charge straight foward a line 100 feet long and 5 feet wide in a direction you choose. Each creature in the line must make a Dexterity saving throw. A creature takes 4d12+5 lightning damage on a failed save, or half as much damage on a successful one. On a failed save, each creature makes a DC 16 Strength saving throw or be knocked prone. You have to make a DC 13 Constution saving throw or take damage from impact. On a succesfull save, you take quarter damage. On a failed save, you take half damage.

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