Forgotten Pain

Suffering felt, even long ago, is easily magnified. A cut hand becomes a severed arm, and a broken bone becomes a broken mind.
You call back to dark times, inflicting an ancient magical torture upon a foe. The creature takes 4d6 damage of the type most recently inflicted upon it if it fails a Charisma saving throw. While you maintain concentration on this spell, you can use a bonus action to force the target make a Charisma saving throw, taking 4d6 damage of that type if they fail.