Raising substitute gu is not difficult. The difficult part was finding ghost gu that could serve as substitutes. Of several thousand insects, I had obtained only a dozen or so. [Burning^Text^Bookstore] I put those dozen-odd ghost gu into my body and nourished them with the ghost energy inside me.
This was different from absorbing ghost insects just now. The other insects had to tear into and fight one another, absorbing each other's abilities, before they could become gu insects. Gu insects were gu kings—beings capable of becoming a fighting force. However, in order to advance my cultivation, I had absorbed all those gu insects as well. That was why my cultivation had risen so quickly.
So what I had done then was absorb them, while these substitute ghost gu were mainly to be fed. After all, only by copying the five-yin energy within my body could the ghost gu gain the ability to replace my body. Only then could they replace the little ghost coffin of Wang Yan.
Making a small Blood Cloud Coffin required substitute gu from a five-yin body, so nourishing them with my own ghost energy was the most suitable method.
Forcing them to absorb energy would not do. I had tried it once, and the result was that one substitute ghost gu could not withstand the powerful force and vanished into smoke.
Ghost insects had no physical shells, only a soul body and an obsession. Once they dispersed, they were simply gone, and all their ghost energy became my own power.
However, third-tier ghost insects no longer improved me much. Fourth-tier insects were equivalent to the Ghost King level, and such insects were truly difficult to find. Third-tier ones were plentiful in the woods. When I encountered the unlucky bear in Xinxian last time, that swarm