The Innate Cauldron Codex was a viable path that was crafted after a certain taboo level creature and could offer better results for those that wanted to reach the peak of the human limit, but he had some doubts about this method, and part of him wanted to see it.
He however decided to ask for it later after he had already reached the limit of the human body using the tough method.
VOTE for me! That would make my day.