Remember [Lewen] in a second. Alas, for you to read wonderfully.

Through this biography-like book, Chu Yun learned a lot of information that he had not known before.

The more he knew, the more shocked he became—he had underestimated the Demon Lord too much.

He was surprised that from the records of this biography of the underworld, there was no reflection at all that someone had discovered that the Demon Lord was secretly studying the soul sacrifice technique.

Even, the entire underworld has always regarded the Pleiades as a normal ghost king, and even the lower Hades King has not found any abnormalities. But all of a sudden, the Soul Sacrifice Technique was born perfectly, and the Demon Lord himself had grown to the point where he was able to kill the Hades King.

Chu Yun only felt a chill all over his body.

It's horrible......

The most terrifying thing about this demon lord is not his strength, but his ability to forbear.

What he did was hidden from the entire underworld, which is the most terrifying.

There are countless masters in the underworld, but they don't know what he is doing secretly. Otherwise, how could the Pleiades be replaced by the Demon Lord as soon as he turned around?

"Such a ruthless man who knows how to forbear, now ...... Will it still be forbearing, and will it continue to recover and become stronger?"

Chu Yun even felt a little creepy.

The Pleiades jumped from the ghost king to the demon king, and after being destroyed, he endured for 10,000 years and was reborn.

Right now, he was wiped out by Chu Yun again. But who can guarantee that he won't endure it again?

"No, Zou Ping's sacrifice will not be meaningless. Chu Yun shook his head and put aside the distracting thoughts in his heart.

In any case, everything is just speculation caused by his sense of crisis, and it cannot be taken seriously.

"Cloud, look at this row. ”

At this time, Mu Xiaoxiao's voice also brought Chu Yun's thoughts back to reality.

"This row is full of information from the staff of the underworld. Mu Xiaoxiao pointed to a whole row of areas on the bookshelf and said.

This part of the books is specially classified, and it is obviously what Chu Yun wants to see the most.

It's just that there are too many books in a row, and Mu Xiaoxiao has only turned a few so far.

"Let's all go through this part of the book first, and leave the rest alone. The Four Ghost Kings may come back at any time. Chu Yun reminded again.

As he spoke, he also took a quick look.

From the fourth to the eighteenth layer, from the first-class ghost to the lower fourth-class ghost, and then to the little ghost who is lower than the ghost, all of them are recorded.

The little ghost is like the lowest-level soldier, Chu Yun naturally directly excluded this part of the information, but mainly focused on the middle and lower level ghosts.

According to his speculation, if Lin Yuexi has a position in the underworld, it is most likely that he should be an inferior ghost.

Anyway, she also went through the back door, so she wouldn't be a little ghost who was called by all the ghosts.

As for the first-class ghost difference, it was impossible, after all, she was only a mortal when she was killed.

Brush Brush Brush –

The four of them flipped through the book together, and their divine senses continued to absorb the information in it, and the names of the ghosts made people feel dizzy......

At the same time, thirteen floors.

"Thirteen ghost kings, four ghost kings ask to see. ”

In a towering palace in the middle of the thirteenth floor, the imp shouted very respectfully at it.

"Four Ghost Kings, why did he come to me?" The Thirteen Ghost Kings sat on the throne, cultivating silently, and at this time, they couldn't help but open their eyes, and said suspiciously, "Let him come." ”

"Yes. ”

The imp answered.

Soon, the Four Ghost Kings rushed in in a hurry.

Now that he had arrived, he no longer thought about whether he would disturb the Thirteen Ghost Kings.

It's just that after the four ghost kings came in, they saw the thirteen ghost kings meditating and pranayama leisurely.

"Uh...... Thirteen, you're done?" the Four Ghost Kings hesitated.

"Busy? What do I have to do? Even if there is, I'll leave it to my little brother. The Thirteen Ghost Kings said lightly.

"Such a big matter, you still leave it to the younger brother to handle it, since you have time, how good it would be to go to me in person. The Four Ghost Kings couldn't help but complain.

"I'm looking for you?" the Thirteen Ghost Kings looked dazed.

"Forget it, I'll come to you anyway, if you're free. "The Four Ghost Kings haven't thought much about it yet.

The Thirteen Ghost Kings felt that the Four Ghost Kings were very strange today, and asked, "Fourth, why are you talking strangely?"

"Can you not blame it, something so big. Quick, take me to the old temple of the Pleiades. The four ghost kings couldn't help but say, and pulled the thirteen ghost kings away.

Before the thirteen ghost kings could get confused, they had already been dragged far away by the four ghost kings.

What appeared in front of the two ghost kings was a dilapidated palace that had been exhausted for more than 10,000 years.

This old hall is where the Pleiades once lived and cultivated.

"Open. The Four Ghost Kings urged.

The Thirteen Ghost Kings were full of doubts, but since it was the request of the Four Ghost Kings, he still did it.

There is a layer of enchantment outside the old hall, and no idle people are allowed to enter, and only the thirteen ghost kings can open the enchantment.

As soon as he opened the barrier, the Four Ghost Kings immediately flew inside.

"Fourth, what are you doing? ”

"Can you not be in a hurry, I want to confirm with my own eyes. ”

Before the sound fell, the Four Ghost Kings came to a stone platform in the center of the old hall.

On the stone platform was a thing shaped like a crystal ball, and in the crystal ball, a tiny black fragment faintly appeared.

The shards emit a faint dark sheen.

Rumble!

After seeing the crystal ball, the Four Ghost Kings seemed to have been hit by five thunderbolts, and they immediately froze in place, and their faces became very ugly.

"What are you nervous about, what are you doing here all of a sudden?"

The Thirteen Ghost Kings followed, and as soon as he spoke, he also noticed the luster of the fragments in the crystal ball.

"What?!"

The Thirteen Ghost Kings were shocked and lost their voices.

As the king of the thirteenth floor, he knows best the origin of the old hall and this crystal ball.

This small fragment in the crystal ball should not have any luster, but now it is ......

"Demons, Demon Lords, is it ......?"

The Thirteen Ghost Kings even became staccato in their voices.

This small fragment is the remnant soul fragment that happened to be collected by the previous Hades King when he fought with the Demon Lord, and he severely injured the Demon Lord.

There was not a trace of the Demon Lord's consciousness in this fragment, just something pure and extremely small.

Although the shards pose no threat, they were once born from the same origin as the Demon Lord. Therefore, the state of the fragments can also somewhat reflect the state of some demon lords.

That's why the fragments are so solemnly sealed.

The Demon Lord is too ghostly, and with this fragment, even if he really exists, at least the underworld can make some warnings through the strangeness of the fragment.

When the Demon Lord's life force appears, the fragments will also be manifested.

For the previous 10,000 years, the fragments had been dead ashes, suddenly shiny and vibrant a few years ago.

At that time, the Demon Lord was about to be reborn again, and he appeared in the mortal realm.

After the Demon Lord died, the fragments turned dead gray again.

But at this moment, the fragments changed again. Although it was only a faint and almost undetectable luster, it was enough to make both ghost kings panic......