Celestial Flare

You create a sphere of divine radiance that explodes at a point you choose within range. Each creature within a 15-foot radius of that point must make a Dexterity saving throw. A creature takes 6d8 radiant damage on a failed save, or half as much damage on a successful one.

Creatures that fail their saving throw are outlined in holy light until the start of your next turn. The first attack roll made against an outlined creature before the start of your next turn has advantage.

At Higher Levels: When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.