Once upon a time there was a demon pass

The walls are lined with patterns, which are not particularly complicated, but they are completely different from any formations that the human race currently has.

At least on this line, there is no energy core source.

In other words, its activation does not depend on items like demon crystals.

"It is engraved at the entrance of the cave, and it is only aimed at the monster race."

Yu Sheng pondered for a few seconds, took out his phone, and took a picture of the texture on the wall.

Worried that it was just a simple photo, the core of the formation might not be able to be restored, so Yu Sheng evenly smeared ink on the wall, pasted a piece of white paper, and engraved it completely.

The internal space of the Shanhe bottle has become empty after the previous burning, and Yu Sheng spent a whole day shopping in department stores before replenishing the equipment.

Putting away the white paper, Yu Sheng turned around and looked inside the cave.

"I just said that it's unreasonable to have slow platforms but no caves."

"It should be the movement of the earth's crust, or a long time, that blocked the entrance of the cave..."

Yu Sheng whispered softly.

The cave itself is not too big, and there is only a narrow passage leading to the depths, and the environment is a bit dry.

"According to common sense, the cave does not see sunlight all year round, so it should be humid."

"Because the cave is used for living, so what measures have been taken to prevent moisture?"

With doubts, Yu Sheng kept walking inside.

But this passage seems extremely long, and the angle is slightly inclined, more like walking continuously towards the belly of the mountain.

As it went deeper, the walls on both sides became flatter, and there were obviously some artificial traces.

Yu Sheng's pace gradually slowed down, and he walked forward slowly with a long sword in his hand.

The cave seemed extremely deep, with no end in sight, and even the giant flashlight on the shoulder couldn't reach the end.

In the silent passage, only Yu Sheng's footsteps echoed constantly.

The atmosphere became more and more oppressive.

After walking in this cave for about 10 minutes, Yu Sheng stopped walking, looked at a stone wall in front of him, seemed to have discovered something, quickened his pace, and walked over.

On the smooth stone wall, people used sharp tools to outline patterns, like a comic strip.

first slide...

A bustling scene, many quaint buildings, and crowds on the streets!

It's just that in this scene, there is no technology, including tall buildings, buildings, cars, etc., which look very primitive.

but...

A child was holding a leopard in his hand. The leopard looked very cute, lying on the ground, allowing the child to stroke its forehead.

Judging from its size, it would be at least level three in the Demon Domain.

Not far away, a middle-aged man in ordinary clothes was riding on the back of a fierce tiger. There were cloth bags hanging around the tiger's waist, which seemed to be full of goods.

That huge body starts at level five!

And this scene seems to be seen everywhere on the street, just like people walking dogs, raising cats, and riding horses before the spiritual energy revived.

It's just that their pets look a little... fierce!

The tallest building in the picture is a three-story wooden building.

And on the terrace outside the third floor, there is a young man standing. Although it is only outlined with a few simple strokes, it still sets off the aura of this young man, which is obviously different from the people on the street.

The young man had his hands on his shoulders and looked down at the street. His long gown swayed with the wind, and his long hair was also blown a little by the wind.

The painting style of the second mural began to show some vigor.

Youth seems to have grown into middle age a little.

Temperament introverted, do not show the edge.

He stood on top of a city with a plaque engraved on the city, but Yu Sheng didn't recognize the words on it.

In the city, the common people looked a little nervous, but when they looked at the middle-aged figure, they had confidence in their eyes.

And outside the city, there are also countless people.

These people were all riding on monster beasts, holding weapons, as if they were going to attack the city.

The third mural.

The city looked a little dilapidated, but in the end it survived. The middle-aged man sat alone on the top of the city, his gown was still swaying in the wind, but his long hair was loose and casually draped over his shoulders.

He was holding a wine jug in his hand and took a sip!

Below, there are densely packed corpses, some of human beings, some of beasts...

The people in the city are rebuilding their homes.

Although it looks a bit miserable, the picture highlights a kind of warmth.

Yu Sheng didn't look back in a hurry, but took out his mobile phone, pointed at the murals one by one, recorded them, and carefully analyzed the details revealed in the murals.

First of all, in that era in the murals, there were no monster races.

Those so-called powerful monsters are just slaves of 'humans', used as pets, means of transportation, or tools of war.

Of course, although the existence of these ruling monster races looks exactly the same as human beings, perhaps they also have unique names for themselves.

So the word 'human' is in quotation marks.

And it can also be analyzed from the murals that they did not study technology, but purely followed the path of practice, and the overall strength of practice is not weak.

At least if you want a level five tiger to honestly carry the goods for you, it is difficult to do without absolute strength.

But this is just a middle-aged man walking casually on the street.

It's hard to imagine how powerful 'human beings' were in that era, or what the world outside this city was like.

Just judging from the three murals known so far, they are already full of shock.