The final tier of the Invincible Vajra Body was the Eternal and Indomitable Vajra Realm.

It was the Buddhist way of gaining eternal life.

There were a total of nine levels in the final tier of the Invincible Vajra Body. Passing through these nine levels of Vajra trials would cause one's body to evolve, finally reaching eternal life.

Wu Yu had not much to go on about regarding these levels. After all, Ming Long had not reached this stage before.

Therefore, Wu Yu could only go by his own knowledge, and would probably not be as quick in progressing.

Wu Yu sat in the void chasm and studied the final 1000 words of scripture, contemplating them a thousand times, ten thousand times, a hundred thousand times......

To him, these 1000 words were the most arcane and profound knowledge that he had ever come across. Even reading them 100,000 times, he still felt that he had not deeply understood them.

However, it was not a pressing matter. The many demon kings outside were more pressing.

These demon kings had started to poke into void chasms to look for traces of Wu Yu. The eternal demon emperor corpse was too important for them to give up on, no matter what.

Therefore at this moment, the demon kings had even sent out their own intelligence forces to scour the Demon Immortal Realm for news.

After all, it had been a few hundred years since Wu Yu had obtained the eternal demon emperor corpse.

In this time, if Wu Yu was not still hiding in one of these void chasms, then he might well have already left the black sea.

These demon kings also knew that Wu Yu had some kind of wondrous escape mechanism.

Wu Yu might already have broken through their sealing of the black sea.

But now, if Wu Yu showed his face anywhere in the Demon Immortal Realm, any demon immortals who spotted him would likely get word back to the demon kings.

These demon kings commanded considerable influence throughout the Demon Immortal Realm. They had a vast information network.

These demon kings had established their base in the Demon Immortal Realm over countless years, and had eyes and ears everywhere.

Of course, they only sent out word to look out for those three, but did not provide any reason why.

Otherwise, the entire Demon Immortal Realm would go into a frenzy searching for the eternal demon emperor corpse.

Until now, a few hundred years had passed, and knowledge of the eternal demon emperor corpse was still limited to these demon kings.

This was good news for Wu Yu.

If too many knew about it, the time before he was discovered would greatly shrink. This was precious time that he needed for cultivation.

In the void chasm, it was not easy for the demon kings to locate him. They would waste a lot of time in the process.

In the black sea, those void chasms that had been searched had been marked to indicate that Wu Yu was not within.

These searched void chasms were all marked, and invisible immortal designs were also attached to them.

With these immortal designs in place, Wu Yu could not change locations halfway, or these immortal designs would reveal him, and his location exposed.

On top of this, the demon kings employed all sorts of doppelganger techniques to search, increasing the speed.

Of course, in the four or five hundred years that had passed, they had only searched a tenth of the area.

Within the void chasm, Wu Yu was still busy with the final 1000 words of the Invincible Vajra Body scripture. He had already read them billions of times.

But still he could not refine his understanding to the point of mastery.

Wu Yu knew that the nine Vajra trials of the Eternal and Indomitable Vajra Realm were each scarier than the last. They promised prodigious levels of pain.

With each Vajra trial passed, his Eternal and Indomitable Vajra Realm could rise by one tier.

After passing the ninth tier, he would have obtained eternal life.

Unfortunately, it was unclear when the Vajra trial would come. It entirely depended on Wu Yu's comprehension of those 1000 words, as well as his prior dao enlightenment.

In the 500 years since obtaining the eternal demon emperor corpse, Wu Yu had used the knowledge gained from it to trigger the first tier of Vajra trial.

All of a sudden, the 1000 words of scripture started to fill up his body, changing into Vajra knives.

His body was suddenly filled with many sharp blades forged of Vajra. They were comparable to great void immortal treasures.

These Vajra knives started to pour out from within his body, slicing it up. He felt in complete agony.

The pain was even more excruciating than when he had been submerged in the sea of fire. After all, the Vajra knives within his body made him feel like he was being dissected, again and again. The agony of being butchered by the Vajra knives was difficult to endure, even for Wu Yu.

"But I've already reached this stage. How can I possibly give up here? I will definitely reach eternal life!"

This was but the first tier of the Eternal and Indomitable Vajra Realm.

Wu Yu was unafraid. If he failed here, then all would be wasted. He forced himself to an alert state to embrace the Vajra trial.

There were 100,000 Vajra knives cutting into him from the front and back. They were brought into existence by the scripture, and continued to ravage his body.

He lost track of time. It might have been centuries, and Wu Yu's entire body was broken until not a single inch was left whole. He was cut over and over again, and very nearly fell to pieces at times.

And yet he continued to endure this pain for centuries, until in the end he felt numb.

He had gotten used to the 100,000 Vajra knives cutting him. The pain of his flesh being constantly sliced and torn into was now a part of him.

This was an astonishing feat. For Wu Yu, when he got used to the 100,000 Vajra knives cutting him, he had basically already succeeded.

Finally, the 100,000 Vajra knives faded from within him, and his flesh was fortified again, his extent and speed of recovery also boosted.

As the 100,000 Vajra knives vanished, his drawn and quartered body repaired itself in a flash.

These had been Vajra knives born within his body, and brought into existence by the Invincible Vajra Body scripture. Therefore, they had been very deadly against Wu Yu.

And now Wu Yu felt that 100,000 Vajra knives cutting him was still below his threshold of endurance.

As he completed the first tier of the Eternal and Indomitable Vajra Realm, Wu Yu felt that he could still continue. After all, he had puzzled out two heavenly rule powers, and reached the second tier of the Great Void Immortal Realm.

The question was when the Vajra trial would come. The arrival of the Vajra trial depended on his understanding of the scripture.

Therefore, Wu Yu delved back into the text, reading it 10 billion times, 100 billion times, 1000 billion times...

Year after year passed, and Wu Yu continued studying the 1000 words of scripture. He integrated and matched it against the knowledge that he had gained from the eternal demon emperor corpse, and Wu Yu again felt the oncoming of a Vajra trial.

This was an even more arduous challenge. The second Vajra trial materialized 1 million Vajra knives within his body, and Wu Yu felt 10 times the pain of the previous trial. He almost fainted from the overwhelming pain!

However, he was able to hold on at the last moment, and force himself to alertness.

He had read the 1000 words more than 10 trillion times before this Vajra trial had arrived. He could not afford to miss it. If he did, then all his previous efforts would be wasted. All those years.

The million Vajra knives continued to cut away at his body, and he felt pain like never before!

Every second was agony, the million Vajra knives twisting into his organs, scraping and boring away at his bones, gaging and carving away at his flesh, rending, ripping, tearing, and pulping Wu Yu's body.

Even before he could recover fully, it was again ravaged, his body being minced in a torturous manner.

However, Wu Yu instead immersed himself into the pain. He could clearly feel that each cut from the million Vajra knives made him stronger, and his recovery speed grew faster.

Although every fiber of his being hurt, but his spirit was indomitable. Wu Yu managed to hold on.

5000 years.

From start to finish, Wu Yu had spent 5000 years cultivating since he had obtained the eternal demon emperor corpse!

He finally reached the second tier of the Eternal and Indomitable Vajra Realm. His flesh had reached a certain level of sturdiness.

If he fought a demon king of Black Yama Demon King's caliber now, Wu Yu could casually deal with him at will, and kill him off. He would not need to burn indiscriminate amounts of energy to barely deal with him anymore.

Wu Yu's strength was on a completely different level from his former self.

"I wonder what's going on outside."

Wu Yu wondered to himself. He guessed that the other demon kings would not have given up easily.

After all, the eternal demon emperor corpse was a once-in-a-blue-moon chance. 5000 years was nothing compared to how statistically rare this chance was. The demon kings had but to find the corpse, and all the time would pay for itself.

However, for safety reasons, Wu Yu first sent out clones to exit the void chasm and scout the situation outside.

Currently, both Full Moon of Nanshan and Ye Xixi were still cultivating. If there was any trouble going on outside, Wu Yu could help buy them for them.

100,000 dopplegangers. Wu Yu turned into the golden ape, and then plucked 100,000 monkey hairs. With a puff he blew out 100,000 unshackled doppelgangers that looked no different from his real body. And then he sent two of these clones out of the void chasm first.

His two clones left the void chasm stealthily, creating as little signature as possible. In the black sea, they were hard to detect.

Even with their clones searching, the demon kings were unable to post up too many numbers. Happily, there were no demon kings in the vicinity to spot these two clones rushing out of the void chasm.

But Wu Yu did not dare to be overconfident. He sent the two clones out in a cautious scouting mission, and very quickly learned of what was going on.