The so-called All Laws Persona!
It is a condensation of a spiritual energy body, but this body is not an ordinary one. It requires the cultivator to utilise their innate talents and divine sense, constantly incorporating various technique laws and divine skills.
In the beginning, this cultivation technique seems slightly innovative, but as it progresses it becomes extremely powerful.
Upon reaching the Nascent Soul Formation, it is as though you possess a second nascent soul. When fighting against others of equal realm, the odds are substantially in your favor.
But that's where the problem lies. The experiences of predecessors in cultivating All Laws Persona are completely ineffective. Each person needs to evolve according to their own constitution and talent, supplementing it with divine sense to bestow spirit.
This has led to an irreversible decline of the Wan Gu sect after their ancient ancestor's nirvana.