According to the historical records of many cultivators in the Primordial World.
In the past, when Pangu slew the three thousand demon gods, Shenni, who possessed the Hunyuan Wuji cultivation and wielded the Great Dao of Fierce Beasts, fled in defeat!
Since it was the three thousand Chaos Demon Gods who were besieging Pangu at the time, Pangu was unable to pursue Shenni due to his limitations.
Shenni thus succeeded in his escape. However, he was struck by one of Pangu's axes, which shattered his Hunyuan Wuji Dao Fruit and left him with immeasurable injuries. His strength even plummeted to the Hunyuan Golden Immortal realm!
At that time, Shenni had two choices!
One was to recuperate in the depths of the Chaos, like the Five Elements Demon God, and use countless Hunyuan Qi to repair his Hunyuan Wuji Dao Fruit.
In this way, after tens of billions or even hundreds of billions of years, his injuries would have mostly healed, and his Dao Fruit would be complete again.
The Five Elements Demon God and the Xuan Tian Demon God chose this method.
However, after Pangu's demise and the formation of the Primordial World, Shenni discovered a better method!
That was to abandon his Chaos Demon God body and seize the body of a native creature in the Primordial World—a Fierce Beast Emperor—to lead the Fierce Beast race and contend for dominance in the Primordial World!
To the Chaos Demon Gods, the Primordial World was almost equivalent to Pangu's Dao Fruit!
To lay the groundwork in the Primordial World beforehand, like Dao Ancestor Hongjun, spreading the Immortal Dao and Heavenly Dao laws throughout the entire Primordial World, transforming them into the Heavenly Dao and Heavenly Will that governed the Primordial World, becoming the teacher of all saints, and accepting Pangu's orthodox disciples...
All these actions would undoubtedly bring immense benefits and advantages in usurping Pangu's Dao Fruit...
Therefore, while the Five Elements Demon God and the Xuan Tian Demon God chose to heal their wounds peacefully,
Shenni, Luohu, Hongjun, Yin Yang, and Qian Kun, these Chaos Demon Gods, chose a more aggressive approach. They descended upon the Primordial World as soon as it was newly created, not in their damaged Chaos Demon God bodies, but by seizing the bodies of native creatures of the Primordial World, thus intending to invade the Primordial World from within!
This was not surprising!
The true bodies of Chaos Demon Gods entering the Primordial World would be akin to an external invasion, likely provoking the Primordial World's innate defenses, and even Pangu's remaining contingency plans!
Shenni's Chaos Demon God true body and Dao Fruit were already damaged at that time, not in their prime. Naturally, he dared not enter the Primordial World in his true form. He could only seize the body of a native creature of the Primordial World, the body of a Fierce Beast Emperor, to enter the Primordial World!
Due to Shenni's foresight and decisive timing, his arrival in the Primordial World was even earlier than Hongjun, Luohu, Yin Yang, and Qian Kun.
Thus, when the other four Chaos Demon Gods also seized the bodies of native creatures of the Primordial World and entered it, they were dismayed to discover that Shenni had already unified the Fierce Beast race and gained an advantage in the Primordial World!
The advantage of unifying the Primordial World, becoming the Heavenly Dao and Heavenly Will, governing the Primordial World, and establishing saintly positions!
How could the four Chaos Demon Gods allow Shenni to act unchecked?
They immediately spread a flawed version of the Demon God Law in the Primordial World, attracting the attention of Yuan Feng, Shi Qilin, and Zu Long, the three ancestors of the three tribes. They formed a coalition of the three tribes to jointly oppose the Fierce Beast race and battle Shenni!
This was the reason for the outbreak of the Fierce Beast Tribulation!
Shenni, battling the four Chaos Demon Gods, was even holding a slight advantage (he was the first to seize a Primordial body, and his cultivation recovered the fastest. It wasn't that Shenni's strength was the greatest, but the advantage gained from arriving earlier in the Primordial World.)
Dao Ancestor Hongjun, seeing the unfavorable situation, with a grin, invited the hidden trump card, Immortal Yang Mei, to launch a surprise attack!
It turned out that not only Yin Yang, Qian Kun, Luohu, and Hongjun, but also Immortal Yang Mei had infiltrated the Primordial World!
However, to avoid attracting Shenni's attention and to serve as a trump card against him, Immortal Yang Mei remained obscure, hidden in the shadows, only to deliver the final blow to Shenni at the most critical moment!
Shenni, who was battling the four Chaos Demon Gods and holding the advantage, became careless!
Immortal Yang Mei launched a surprise attack, and Shenni was severely wounded. The situation instantly reversed, and the five Chaos Demon Gods suppressed the Fierce Beast Shenni!
The body of the Fierce Beast Emperor that Shenni seized had an extraordinary origin. It was formed from the boundless resentment of the three thousand demon gods towards Pangu after their demise.
The five Chaos Demon Gods, whose cultivation had not yet recovered, were only at the peak of the Hunyuan Golden Immortal realm. They truly had no way to deal with this Fierce Beast Emperor's body.
This was because, with its body formed from boundless resentment, it was impossible to obliterate its life without the cultivation of a Hunyuan Great Luo Golden Immortal.
After a moment of thought, the five Chaos Demon Gods suppressed and sealed Shenni, casting him down to the deepest and lowest part of the Primordial Continent.
There, there was a naturally formed Great Thousand World, which the five Chaos Demon Gods called the Endless Abyss!
This lowest, deepest world was the foundation of the Primordial World's karma. The Heavenly Dao of the Primordial World, which spoke of karma entwining the bodies of sentient beings, drew countless karmic forces from the Endless Abyss and forcefully attached them to those who committed evil deeds.
Karma, this seemingly intangible thing, also had a physical location for its storage! A warehouse!
The Endless Abyss was this warehouse!
This Great Thousand World was evolved from Pangu's Dao Fruit, specifically designed to bear the boundless karma...
Shenni was cast down into this Great Thousand World.
Countless karmic forces entangled his body.
Seeing this, the five Chaos Demon Gods knew that Shenni was doomed, that he would inevitably be annihilated by the karma of a Great Thousand World, his Fierce Beast Emperor body, his primordial spirit, and his magic power.
Thus, the five Chaos Demon Gods departed.
And Shenni, in agony, walked towards death—this was the history recorded by some of the longer-lived cultivators in the Primordial World!
According to the historical records of these knowledgeable cultivators who had lived through the Fierce Beast Tribulation, the Dragon-Phoenix Tribulation, and the Witch-Demon Tribulation...
Shenni was as dead as could be!
And regarding the Endless Abyss, this Great Thousand World filled with karma, the Heavenly Dao's warehouse, no cultivator had the nerve to explore what the Endless Abyss truly looked like!
"According to historical records, Shenni is already dead..."
"But is he really dead?"
Fang Ming pondered some Primordial World novels from his past life, his heart sinking. He knew that theoretically, Shenni might not be dead!
Or, even if he perished, it wasn't a complete annihilation—he still had means to revive and return!
"The Endless Abyss, found?"
Fang Ming asked You Chao Shi.
You Chao Shi replied without hesitation, "Heavenly Emperor, the Endless Abyss has been found."
"Some humans, following the mission you assigned, Heavenly Emperor, successfully drilled continuously towards the underground of the Primordial World."
"They broke through countless layers of earth, reached the deepest part of the underground, and used various means to finally find the Endless Abyss and open this Great Thousand World..."
As You Chao Shi said this, he sighed, "When this Great Thousand World was opened, several nearby Great Luo level humans were tainted with boundless karma and perished on the spot. The human race lost several more Great Luo Golden Immortals..."
Fang Ming then said, "Since there have been sacrifices, they must be made worthwhile!"