Arcane Retribution

Your weapon manifests an arcane duplicate of itself that attempts to strike the creature that attacked you. If a creature does a melee attack against you, an arcane manifestation of your weapon will attempt to strike it back. The target must succeed on a Dexterity saving throw or take 1d6 force damage.

This spell’s damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).