Burning Radiance

A line of light 60 feet long and 5 feet wide emanates from
you in a direction of your choice. Each creature in the line
must make a Dexterity saving throw. On a failed save, a
creature takes 10d8 radiant damage and catches fire; until
someone takes an action to douse the fire, the creature
takes 1d10 fire damage at the start of each of its turns. A
successful saving throw halves the damage and prevents a
creature from catching fire.
The burning radiance ignites flammable objects in the
area that aren’t being worn or carried.