Bhah'b'h's Starburst

A beam of light emits from your pointing finger to a point you choose within range and then blossoms into an orb of dazzling 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, or half as much damage on a successful one.

The light spreads around corners and dispels magical darkness created by lesser magical effects.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d6 for each slot level above 4th.