Perhaps the origin of Emperor Zhou Sui of the Human Clan is so grand it would terrify people.
Otherwise, it would be impossible to cause such a huge sensation in the Mortal World, developing the Human clan to such an astonishing degree single-handedly.
If the Book Realm truly contains Cultivation Techniques above those of a True Immortal, that would be enough to prove Emperor Zhou Sui must be the reincarnation of some important figure from the Immortal World; otherwise, he simply couldn't accomplish such a feat.
"Haha, regarding this matter, I happen to know a bit of information as well."
"As far as I know, once you advance to True Immortal, there's no so-called cultivation technique."
"If an Immortal wants their cultivation to progress, there is only one method, which is to comprehend the Heaven and Earth Laws."
"Because of this, for Immortals, the most important thing is Immortal Techniques."
"Because Immortal Techniques are a supreme skill that incorporates the laws."
