In this chapter, we learn that the blood devil's secret manual contains instructions on how to break into the body of the primordial spirit. The body of spirit, according to the manual, can hide the spirit in its own body and split it into two parts. The essence of the spirit can be split and used to regenerate itself. This means that if you use the blood essence to split the body, you'll be able to regenerate the body itself. In other words, you can use the body's power to heal the body even if you don't use it to heal. This is a pretty good idea. The only problem is that you have to figure out a way to get the body to stop using its power. You can't just use fire and water to kill the body. You have to use the power of the blood itself to make the body stop using it. That's a lot of work, right?