Dawnburst

A shining beam flashes from your palm to a point you choose within range and then blossoms with a low roar into an explosion of blazing sunlight. Each creature in a 20-foot-radius sphere centered on that point must make a Constitution saving throw. A target takes 8d6 radiant damage on a failed save and is blinded for 1 round, or half as much damage on a successful one and is not blinded. Fiends and Undead take an additional 2d6 damage regardless of a successful save.

The chosen area is bathed in a warm glow extending 30 ft. for 1 minute afterwards. This light travels around corners.

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.