Blinding Light

A tiny ball of brilliant light flashes from your finger, racing to a point that you choose. Each creature in a 20-foot-radius Sphere centered on that point makes a Dexterity saving throw. On a failed save, the creature takes 5d10 Radiant damage and is blinded until the end of its next turn. On a successful save, the creature takes half as much damage and is not blinded.

Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot level above 3.