Blazing Starfall

A shower of radiance falls upon your enemies and then bursts out, creating a cage of burning embers that are painful to pass through. Choose a 10-foot cube within range. Each creature in the cube must make a Dexterity saving throw, taking 1d4 radiant damage if it fails. For the duration the area of the cube is lightly obscured, and the next time a creature leaves the area, it takes 2d4 fire damage and the spell ends.

Both damage rolls increase by 1d4 when you reach 5th level (2d4 radiant and 3d4 fire), 11th level (3d4 radiant and 4d4 fire), and 17th level (4d4 radiant and 5d4 fire).