Especially, the immortal text he obtained recorded the methods of refining and controlling Puppet Gu Secret Technique among the southern border's Gu techniques.
It also mentioned the secret method of breeding Gu by feeding them human blood.
Humans are considered the most intelligent special creatures in the world, and no other species can compare with humans.
Many Gu Masters believe that the ultimate purpose of refining Gu is to deal with humans or assist the Gu Master themselves, so using humans to breed Gu insects achieves better results.
Another point is that humans are the most spiritual beings in the world, and Gu born from human women understand human nature and possess high intelligence.
Ever since the Hundred-Tempering Immortal Sect was established, Gu Masters had essentially vanished from sight.
For many years, no Gu Master had appeared.
Even Elder Jiu Yin, who had fortuitously obtained the Puppet Gu Secret Technique, only dared to secretly study and practice it.
