My players were captured in Hall of Harsh Reflections due to the trio of mimics and the actions of one rather devious doppelized PC’s actions. They were imprisoned long enough to have their minds copied but managed to escape before they could be executed. They later returned and cleaned up the rest of the doppelganger infestation with a vengeance.
Long story short; after finding out what the mind clones actually were they came up with one of the most horrifying ideas I have ever heard.... “Can we put this in a golem?”
While I know my players don’t actually mean to do it in game, it really is an intriguing idea.