As for how to research this, it was definitely the Elders and Hall Masters of the Upper Three Realms who collaborated with him in his research, even granting him access to all the Cultivation Techniques from the Qi Refinement Realm to the Peeping Dao Stage for reference.
"Mysterious, it truly is mysterious."
"Your 72 Transformations involve physical metamorphosis, while these 36 Transformations are soul-oriented; the former having form without spirit, the latter possessing both form and spirit—it truly is remarkable."
After listening, Yun Yu unconsciously attempted it and his hands transformed into tiger claws, but quickly reverted back.
He also grasped the trick right away. Although his insight was limited by the Heart Demon, it only meant that he couldn't break free from the constraints of his inheritance to innovate and develop, not that he was foolish; instead, he possessed the necessary knowledge reserves and experiential wisdom.
