Never

Dyon's skinned reddened under the strain, but his face was completely serene. He had been quite serious when he said he didn't feel pain the same way anymore. It wasn't that he didn't know that he was in pain, or that he didn't know that it hurt, it was more so that his pain tolerance had increased to astronomical levels.

After having his body sheared apart and reformed just to be sheared apart again, it was hard for anything to compare… Even if that comparison was the tearing of your soul.

Although Dyon hadn't thought about it much, the truth was that what his grand teacher had done for him wasn't as simple.

Meridians were an organ system, but, not an organ that was simple to replace. For example, transplanting a heart might be difficult, but it was still an acute process and confined to a small work area. However, the circulatory system as a whole is different. One can't expect to be able to switch in a completely new set of veins and arteries for a person.