"Fellow Daoist Leng, I have experimented on beasts, managing to cut open their skin and flesh and then sew them back together completely.
Moreover, it does no harm to the beast's life, but I have only ever tried it on beasts. I am not familiar with the physical structure of a cultivator, nor do I know if I am up to the task.
It is difficult to guarantee that the first few attempts will go without issue. Using the knife requires much training, and I must practice on at least one person before I can guarantee success.
Chapter 165