At that time, Yu Ziqing was quite puzzled, but later he found out that there really were similar Dharma Methods. It was just that he was uneducated and inexperienced back then, so he didn't know.
And later, when he discovered the Saint, he learned that this method of ascension had a mature route, but nobody used it anymore.
The biggest reason it was barely used had two main points.
First, it is unstable, and so is the cost, and most of the time, the cost is somewhat high.
Second, the entities from which power can be borrowed have practically disappeared.
Moreover, with the development of the era, many materials are lost, especially biological materials, many of which are completely cut off.
This path has not had people continuously researching and perfecting it, and even replacing materials has become a huge problem.
The three paths of Qi Refinement, Refining God, and Body Refinement are laid out there, and various talents can practically find their correspondences.
