Why not just bring in another Jocelyn then?
"What could be worse than a Giant Spider Witch?"
"Oh I know! Two Giant Spider Witches!"
Verton should remember his past selves, all of them
If you want him to do that, he could only do one at a time.
This power also allows him to bring back feelings and emotions. He could recall a time that he was Brave or when he was in control, or even when people feared him. That last one wouldn't work because you know jocelyn isnt scared of anything in this form