Divide

A subject who is deemed to possess multiple personalities in one body can be separated using this spell. Cast by a magic user proficient in Conjuration magic, the spell will find, split, and separate the personality in question and it will be reborn in a new body formed from materials found in the subject's own body and other outside components (whatever required by the spell) within a time span of eight (8) hours. The caster must remain in contact with and repeat whatever verbal components required for the full period of time that the spell calls for. 

Any loss in required contact or components will result in a failure of the spell and possible harm to the subject, up to and including death. The GM will handle all required issues involving death saving throws. 

If successful, the separated personality will awaken in their new body with all thoughts and feelings they had from before with no knowledge of the transference unless it is divulged by the party.