The three organs that Wang Wei tempered with and absorbed the necessary material are: the liver, kidney, and lung. As for the materials needed, they are based on the five elements.
The lung represents metal, the kidney stands for water, and the liver for wood. According to the Five Elements theory, metal (lung) promotes water (kidney), water promotes wood (liver).
The process will continue until a cycle of promoting and restraining occur to achieve a state of balance. Unfortunately, Wang Wei does not have the remaining two materials yet; the reason being that his requirements or the sect's requirements were very high.
In order to give Wang Wei the best possible advantage, the Dao Opening Sect chose Innate Treasures of Heaven and Earth to allow him to refine his fleshly body.
Innate treasures are a very special type or quality of material. In some ways, they are even more powerful and rare than Emperor level materials.
According to the little information that cultivators have in the first few Eras that existed in the Myriad Emperor World, during the Chaos Era, the world was just formed and thus inhabitables by any kind of living beings: whether living or nonliving, both organic and non-organic.
However, back then, the world did not have spiritual energy between Heaven and Earth, but Chaos Qi--which is a vastly superior form of energy. After the world was completed and Heavenly Dao perfected the fundamental Laws of Heaven and Earth, the Primordial Era began.
In that Era, Chaos Qi was degraded into Innate Qi. Although Chaos Qi still existed in the environment, compared to the unlimited amount that existed in the previous Era, it was nothing.
Nevertheless, the lifeforms that started to appear in the Primordial Era still benefited from the baptizing of both Chaos Qi and Innate Qi. As a result of this, the majority of life born in that period were referred to as Primordial Gods or Innate Demons--and they were extremely powerful.
Their fleshly bodies were extremely powerful, to the point of using stars as snacks and worlds as worlds as balls to play games with. They were born with extremely terrifying bloodlines granting them unimaginable divine abilities
Two things that cultivators of modern time know for sure about these beings: they were extremely large in size and they were all born with a very high cultivation realm. The weakest of them had the strength of Void Shattered Realm, while the strongest of them reached the level of Great Emperors--and that was at birth.
Many cultivators theorized that the cultivation system of these beings was extremely different from modern times. Due to the fact that the majority of them were born so powerful, they did not need to breathe qi from Heaven and Earth. All they had to do was understand the Laws of Heaven and Earth in order to reach a higher level of strength.
Another speculation of modern cultivators is the fact that since these powerful beings were born with different levels of strength, their society was strictly hierarchical--even worse than modern time.
The higher the strength one of these Gods were born with, the higher their talents, status, and opportunity to grow and develop. A Primordial God born with Void Shatter Realm strength had absolutely no chance to ever surpass one born with Saint Realm strength--not to mention the higher ones.
Of course there are many things that still puzzled cultivators through this time regarding those Eras. There is sufficient evidence to prove that humans existed in the Primordial Era. So, people always wondered how humans appear, survive, and even became the leader of this world in the Beginning Emperor Era, given that these Primordial Gods and Innate Demons.
From the records still left from that Era, humans have always been a weak and pitiful race, so this was a mystery that cultivators often wonder about.
Many people theorized that humans were the descendants of Primordial Gods, while demons were the descendants of Innate Demons given that these Primordial Gods looked exactly like them, and the Innate Demons also looked like the demon race.
As for the rise of the human race, many people attributed it to the first Great Emperor of the Myriad Emperor World, the Heaven Opening Emperor.
The truth of the matter is that many of the theories or conjectures of modern cultivators are correct, while a few were wrong.
The truth of the matter is that these Primordial Gods and Innate Demons were indeed born extremely large, extremely powerful. Their society was indeed strictly hierarchical as the oldest of them were usually the most powerful and have the highest status.
One ability that these creatures had was the fact that they were all immortals. With the constant bathing in both Chaos Qi and Innate Qi, none of them had to worry about their lifespans--so they mostly focused on cultivating.
Additionally, as creatures born from Heaven and Earth--meaning they were not created through procreation--they were considered perfect beings. So, unlike humans and even demons, the concept of conflict and fighting was a very rare thing in their society or civilization.
Despite the strict hierarchy, no one actually complained or became envious as they understood that they were the children of Heaven and Earth, and that their strengths and talents were granted to them--so they should just be happy or content for what they were given.
And if someone wanted to change his or her status, all they had to do was work hard on enlightening the Laws between Heaven and Earth and increase their strengths.
Unfortunately, such peaceful and quiet civilizations did not last long. With the passage of time, these Primordial Gods and Innate Demons discovered that the Chaos Qi and Innate Qi were slowly decreasing.
By the middle of the Primordial Era, the number of Chaos Qi existing was so rare that it could be counted in two hands. As for the Innate Qi, it was slowly degrading.
As such, the members of their races became very difficult to be born naturally. And the ones that were created were extremely weak as they did not even have the power of Law at birth. In order words, Primordial Gods with strength lower than the Void Shatter Realm were starting to be born.
The leaders of the Primordial God race and Innate Demons race decided to use procreation in order to increase the number of their races, and this tactic worked for a while. By strictly controlling who the members of their races can have as partners---or example a Primordial God born with Supreme Realm strength can only mate with someone of similar status or birth--their races strived for a period of time.
Unfortunately, this measure could not save these powerful races.
Although their offspring were unimaginably powerful and gifted, it was still very difficult for them to reproduce due to their strength. The Laws of Heaven and Earth do now allow powerful beings to mate as easily as weak ones, otherwise the balance of nature would be broken.
So, by the end of the Primordial Era, the Innate Qi between Heaven and Earth has turned into Acquired Qi or Spiritual Qi that is present in modern time. Of course the quantity back then could not even be fathomed by current cultivators.
A genius like Wang Wei has to spend five years to reach the 12th Layer of Body Refining Realm. But back in the Primordial Era, a normal person with average talent would only take 10 months. A genius would take a month, and a heaven defying genius like Wang Wei would take 3 to 4 days.
Nevertheless, Spiritual qi was an abomination for these Primordial Gods and Innate Demons. Forget the fact that it could not give birth to their races, now, many of them discovered that they had to start worrying about lifespan. This was horrible news for them.
But good news for the human race. After the first ray of Acquired Qi appeared between Heaven and Earth, a new race was created: the human race.
After these Primordial Races discovered humans, they marveled at how weak they were compared to them; they did have any form of cultivation, they were tiny and died after only 300 years. Even the aura leaked out of their weakest member could easily annihilate these humans.
The majority of them left humans alone, while others decided to keep them as pets or study them--especially their rapid reproductive abilities.
The human race's life back then was neither good nor bad; it was basically based on the personality of the races that took them. For the most part, life was good for most human tribes.
Unfortunately. That did not last long. After calculating the secrets of Heaven and Earth, the leaders of the Primordial Gods and Innate Demons calculated the eventual destruction their races and the rise of the Human Race; they discovered that humans were the chosen race assigned by Heavenly Dao to lead the Myriad Emperor World--even though it was not called such by then.