Long before Fang Yuan entered the Crazed Demon Cave, the Incomplete World Human Sea had already been perfected.
To create the complete Human Sea, Fang Yuan had ordered the slaughter of countless humans. His crimes were monstrous, his hands drenched in blood, but he had obtained his wish and now reaped the anticipated results.
One could imagine just how enormous the morale boost would be among Fang Yuan's forces once the news spread that fallen Gu Immortals could resurrect through the Human Sea!
In fact, within Fang Yuan's memories of his five-hundred-year past life, the Incomplete World Human Sea had already been used by the East Sea Xia Family.
Fang Yuan's five-hundred-year past life.
When Xia Family Gu Immortals died in battle, they would not perish entirely — they could resurrect from the Human Sea. Although their accumulated Immortal Gu and Grotto-Heaven reserves would be lost, the Xia Family Gu Immortals could retain their cultivation level and their Grotto-Heavens themselves.
The East Sea Xia Family had displayed their brilliance because of this, even launching large-scale invasions against the Southern Border at one point. The Southern Border Gu Immortals fought against the Xia Family, and over time, they studied and learned from them. This was what later prompted the Chai Family to replicate the Human Sea Incomplete World and develop the Mountain of People Incomplete World.
In Fang Yuan's five-hundred-year past life, Fate Gu had only been damaged, not completely destroyed. Now, however, Fate Gu had been utterly annihilated.
The difficulty of using the Human Sea to resurrect Gu Immortals would have dropped dramatically.
But Fang Yuan did not allow the fallen Gu Immortals to directly resurrect at their full Gu Immortal cultivation level.
First, Gu Immortals resurrecting with their cultivation intact would place an enormous drain on the Human Sea itself. After only a few uses, he would need to slaughter vast numbers of humans and variant humans all over again.
It wasn't that Fang Yuan was reluctant to do so — he simply found it troublesome.
Second, if these Gu Immortals were brought down to the mortal realm and forced to cultivate from scratch, they would be of far greater value to Fang Yuan.
For one thing, these resurrected Gu Masters had originally been Gu Immortals, possessing abundant cultivation experience. Their success rate in the critical steps of ascending to immortality was practically guaranteed. Each one would be a wonderful opportunity for Fang Yuan to learn from and gain new insights!
For another, as these Gu Immortals cultivated anew, Fang Yuan could assist them during every tribulation and extract Heavenly Dao Marks from the process.
Lastly, these Gu Immortals might even innovate and improve upon their Killer Moves during their re-cultivation. Through this process, they would become more dependent on Fang Yuan, which meant he could control them more deeply.
However, at this moment, as Fang Yuan activated the Human Sea Resurrection Killer Move, his heart suddenly jolted, and a brilliant flash of inspiration burst forth in his mind.
In that instant, he made a critical breakthrough in the Refinement Path.
"So this is how the art of refining Gu using the human body works." A sharp gleam shone in Fang Yuan's eyes, and a faint sense of joy welled up in his heart.
The so-called Human Sea Resurrection method essentially utilized Gu cultivation techniques to refine human bodies and human souls. This was indeed a Human Path method, but at the same time, it was using Gu to refine humans!
Fang Yuan had been relatively weak in the area of refining Gu using the human body. Previously, when he had studied the Ni Family, he discovered that the art of refining Gu using the human body was related to Blood Path and other disciplines. This conclusion was, of course, correct.
"Refining Gu using humans and refining humans using Gu — the two are fundamentally the same in essence."
They were two sides of the same coin, like reflections in a mirror, corresponding to each other perfectly.
The true core was — the unity of human and Gu!
Take the Supreme Immortal Body Gu, for instance. It was a Gu Insect, but once activated, it could transform into a human body. It did not provide a soul — instead, it reshaped itself into the Supreme Immortal Body flesh most compatible with the Gu cultivator's soul.
When Fang Yuan used the Human Sea to resurrect Gu Immortals, he was simultaneously constructing both human bodies and human souls.
Think again of the Ancient Desolate Beast Qingchou — it had originally been nothing more than a Killer Move, yet it had transformed into a living being.
Extending this principle further, any living being could be created using Gu cultivation methods!
This was entirely valid in theory.
In fact, this principle had long been revealed in the "Legends of the Human Ancestor."
In the third chapter, fourteenth section of the "Legends of the Human Ancestor," there was a clear record: all living things originally existed as Gu Insects within the Incomplete World known as the Life Blue Sea. When the waves of the Blue Sea washed these Gu Insects ashore, they became various forms of life.
All methods return to the same source; different paths lead to the same destination.
Refining humans using Gu, refining Gu using humans — humans and Gu were always one!
Although Fang Yuan had known this principle, it was only at this very moment that he had come to fully comprehend its complete and true meaning.
This epiphany was like piercing through the final layer of window paper — everything before Fang Yuan's eyes suddenly became clear and open.
All he needed now was to perform some calculations, and he could design a Killer Move to crack the Ni Family Gu Immortals' techniques, extracting various Immortal Gu from the Ni Family members.
Reaching this point had not been easy.
Fang Yuan already had a foundation in this area — for five hundred years in his past life, he had employed the Isolation Flow refinement method of the human race.
In this life of repeated resurrections, he had accumulated further experience through various encounters.
Although the Ni Family had not become his ultimate breakthrough, studying them had provided Fang Yuan with a solid foundation.
Ultimately, through quantitative change came qualitative transformation, and Fang Yuan achieved his breakthrough on the Human Sea — something that was both surprising and unsurprising.
Since ancient times, the Refinement Path had two major schools.
The first was the Natural Refinement School of the Mao Clan, which refined Gu using nature and Dao Marks.
In contrast, Limitless Demon Venerable used Gu Insects to refine nature and the world itself.
The second was the Isolation Flow of the human race. Ni Ren, a Ni Family Gu Immortal who had reached the quasi-Supreme Grandmaster level in the Refinement Path, refined Gu using humans, embedding various Immortal Gu deep within the bodies of Ni Family descendants.
In contrast, the Supreme Immortal Body, Human Sea Resurrection, Life Blue Sea, and similar methods used Gu to refine humans.
"The realm map of a Supreme Grandmaster of the Refinement Path likely consists of these four pieces. At present, I have already comprehended the human-Gu refinement methods. The only piece remaining is 'using Gu to refine heaven and earth'! And for that piece, by studying Limitless Demon Venerable's arrangements, I have already broken through and crossed the threshold. From here on, there are no more obstacles — I only need to keep advancing until I ultimately comprehend all its mysteries." Fang Yuan calculated.
Treasure Yellow Heaven.
Bai Ningbing's spiritual sense patrolled within it.
She was selling immortal materials.
Ever since she had accidentally witnessed Fang Huan's resurrection and killed him, Bai Ningbing had obtained a large number of Desolate Beast and Ancient Desolate Beast carcasses, as well as the true inheritances she had gained from searching for Fang Huan's soul.
Bai Ningbing had sold most of these immortal materials.
Only a small portion remained.
"How are you selling these immortal materials?" A spiritual sense approached at this moment, asking the price directly.
Bai Ningbing named her price.