God of sword
e.
skin, muscle, vein and bones and 5-9 is called five treasure organ tempering. i.e. heart, lungs, spleen, liver, and kidney.
follow up from 9 stages, the page was thorn, Theo doesn't know who did it, but he felt lost thinking," how good this technique would be when it was complete." But Theo knows that even if he think or felt angry at who ever did it. it won't change anything. so he started looking at the breathing technique as he would need it for his body tempering technique.