Gu technique, currently his success lies in the Human Gu technique, which involves refining the people he killed into Human Gu, mysterious and unpredictable. The reason why he is quite successful in cultivating the Human Gu technique is because his Immortal Celestial Demon Skill inherently can turn people into puppets, laying the foundation for him!
The more enigmatic one is the Evil Shadow Skill, which is extremely difficult to cultivate, and Li An can barely use the first layer: Phantom!
It can be seen that the foundation of these techniques lies in the Life Nourishing Immortal Skill and Immortal Celestial Demon Skill.
