Bedazzle

When an creature hits you with a melee attack, you may react with a shower of bright burning sparks. If the creature can see normally, it must succeed a Dexterity saving throw or take 1d4 Radiant Damage and be Blinded until the end of the current turn.

This cantrip's damage increases to 2d4 at 5th level, 3d4 at 11th level, and 4d4 at 17th level.