Coalthirst’s Universal Mindbender

You attempt to reshape another creature’s core personality. One creature that you can see must make a Wisdom saving throw. If you are fighting the creature, it has advantage on the saving throw. On a failed save, the target becomes charmed by you for the duration. The charmed target is incapacitated and unaware of its surroundings, though it can still hear you. If it takes any damage or is targeted by another spell, this spell ends, and the target’s personality is unaffected.

While this charm lasts, you may completely alter one of the creature’s personality traits, ideals, bonds, flaws, or alignment. You can also change one its memories, as per the modify memory spell, and that memory can have had happened at any point in that creature’s life. Each change takes one action to complete.

You may change any number of minor behaviors, such as nervous habits and unconscious mannerisms, personality quirks, trivial memories, or opinions on inconsequential matters. For instance, you can cause a target to stop spitting and belching in public, or to forget about that one time the baker overcharged him that he has been harping about ever since.

This spell cannot be used to alter attributes or remove or grant abilities, but can be used to convince the target attempt to gain new abilities or refuse to use existing one.