A bright streak flashes from your pointing finger to a point you choose within range, erupting in bright, radiant light. 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 until the end of their next turn, or half as much damage on a successful one and are not blinded.

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.