bardic blade

You make one attack with the weapon used in the spell’s casting. The attack uses half of your charisma modifier (round up)  for the attack and damage rolls instead of using Strength or Dexterity.The attack deals an extra 1d4 psychic damage on a hit, and hit or miss you can disengage as a bonus action.

Cantrip Upgrade. The psychic damage increases when you reach levels 5 (2d4), 11 (3d4), and 17 (4d4).