Devine blast

Radient energy forming a line 100 feet long and 5 feet wide blasts outward from you in a direction you choose. All creatures within the line that fail a Dexterity saving throw or take 6D6 Radient damage, Creatures succeeding take half as much.

The Radient energy 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.