The content on the manuscript paper is a research report, and the content of the study has nothing to do with spiritual practice, nor does it have anything to do with ghosts and spirits.

It studies prehistoric civilizations.

In the city of Xudu, there are actually people who study prehistoric civilizations?

This thing is really weird......

Before the catastrophe, those who could have a place to live in the city were all gods in the underworld!

A god actually went to study prehistoric civilizations......

Is this not a proper business?

Or is there some other reason?

Luo Yun was both curious and confused, he wanted to pick up the manuscript paper, but his hand reached halfway and paused, but he remembered what he had just done with those books.

He didn't want to ruin the manuscript as well.

So he stood at his desk, glanced at ten lines, and read the contents of this page of manuscript paper quickly.

According to the content recorded on this page, before human civilization, there were several other civilizations on the earth, all of which existed for a long time, and all of them were once glorious, and each developed a different civilization route.

There is a giant civilization that focuses on the flesh and tempers the flesh to an incomparably powerful giant; There is a civilization of cultivation that focuses on spells, uses spells to the extreme, and can be seen everywhere in daily life; There are also scientific and technological civilizations that take the route of science and technology and fill all kinds of black technologies, far exceeding the current level of human science and technology many times......

But these civilizations all suddenly became extinct during their heyday, leaving only some clues hidden in the vast river of history......

Luo Yun remembered that he had read some books about prehistoric civilizations before, but they were all read as stories.

But now, he saw a god of the underworld, who was studying prehistoric civilization very seriously, and wrote a detailed research report.

Why is he looking into this?

Is there any connection between the fall of the gods and the extinction of prehistoric civilizations?

In Luo Yun's heart, a big question mark emerged.

But doubts are doubts, or hurry up to find the baby.

So after reading the content on the manuscript paper, Luo Yun left the house and went to other places to continue looking for the treasure.

However, in his heart, he has been pondering the relationship between the extinction of prehistoric civilizations and the fall of the gods......

Soon Luo Yun searched two more houses and found several Yuan Spirit Stones, as well as other magic weapons that emitted spiritual energy balls. But it's a pity that in this pile of treasures, he can only pick up a Yuan Spirit Stone, and a big stone that is pitch black and very heavy, and he doesn't know what it is for.

Thankfully, his aura had increased to 610 points now, which had increased the amount of time he could stay in the capital to ten minutes. Otherwise, it will only take three or two minutes as before, and I am afraid that there will be no treasure at all.

"It's almost time." Luo Yun estimated in his heart.

As soon as he thought this, a cloud of black mist appeared beside him out of thin air, and mysterious bronze arches slowly appeared.

Luo Yun glanced back, and the ghosts hidden in the darkness around him had a commotion after seeing the bronze arch appear.

They did not rush towards the bronze arch, but instead retreated again and again, as if there was something on this bronze arch that made them feel frightened and afraid.

"What the hell are these ghosts afraid of? Could it be that the bronze arch also has the power of the gods to scare them? Luo Yun was very curious.

It's a pity that he can't go to these ghosts to ask for clarification, so he can only put this question aside for the time being, step over the bronze arch, and leave the city.

Luo Yun didn't know that not long after he left the city, a demon general with a body as huge as a small hill and thick black armor on his body came to this place on a ghost horse with four hooves and fire and a bloody glint in his eyes.

Behind him, there were a dozen or so demon knights in the same costume.

As soon as this group of evil ghosts appeared, they didn't need to make a sound, just with the terrifying aura emanating from their bodies, they frightened the ghosts hiding in the surrounding darkness and retreated again and again...... There are even some ghosts who just run away without looking back.

"Already gone?"

The demon general looked around, didn't see Luo Yun's figure, and couldn't help gritting his teeth.

"One step too late...... Damn! ”

He shook the reins and shouted, "Go! The demon knight under his command, like the wind, quickly left this place.

Luo Yun, who returned to the yang world, handed over his harvest to the black cat for identification, and asked at the same time: "Does the fall of the gods have anything to do with the few prehistoric civilizations that have disappeared?" ”

"Why do you ask?" The black cat raised its head and looked at Luo Yun, its expression a little stunned.

"I saw a research report left by a god in the capital, and the content was about prehistoric civilization." Luo Yun said.

The black cat was silent for a moment and said, "It's still the same sentence, I can't tell you this secret until you officially become the heir of Emperor Xudu......"

Luo Yun nodded: "It seems that there is really some connection between the fall of the Ming gods and the demise of prehistoric civilization......

The black cat froze: "Why do you say that?" ”

"If there is no connection between the two, you will definitely laugh at me for thinking too much. But you didn't, but you said you couldn't tell me because of the rules...... This shows that there is a certain connection between the two things. ”

The black cat opened its mouth wide: "When did you become so smart?" ”

"I've always been smart, okay." Luo Yun said with a smile.

"You're capable." The black cat said, "However, this is your own guess, not what I told you, and it is not a violation...... Okay, the knowledge recorded in the two Yuan Spirit Stones has been extracted, and I will give it to you. ”

It opened its mouth and spat out a flash of red light, which shot straight into Luo Yun's brain.

Then with his little paws, he patted the heavy black stone, and said, "As for this, I have also identified it, and it is a piece of Nai River iron." ”

"Naihe Iron? Something to do with the Nai River Bridge? ”

The black cat shook his head: "It has nothing to do with the Nai River Bridge, but it has something to do with the Nai River." Nai River iron, the spiritual iron that only exists in the Nai River. The Nai River is a river that separates the world from the netherworld. If you want to cross this river, you can only take the bridge over the river, which is the Nai River Bridge. If you fall off the bridge, or if you want to walk from the river, you will only fall into the depths of the Nai River, become a member of the soul of the river, and you will never be able to leave, and you will suffer from drowning every day! ”

After a pause, the black cat continued, "So, Naihe Tie is born with an extremely strong suppressive power against demons. At the same time, because of the absorption of ghost qi and resentment for many years, it has a strong aura and a special negative corrosive power, which is one of the most suitable materials for making offensive magic weapons in the Netherworld. Once made, it can be used not only to suppress demons, but also to deal with monks and gods. You can pick it up, it's really a treasure. ”