The mural is huge, stretching all the way to the depths of the corridor.

Yu Tiansuo went all the way and watched all the way.

He found that it was a bit like the comic strip he had read in his first life, with more than a dozen storyboards about a magnificent war.

A powerful army, descending from the clouds on the earth, is attacking another army.

The army descending from the clouds, outlined in black paint on the murals, all dressed in ornate armor, with circles of light painted behind them.

The opponent of this army is outlined in blue paint.

Although the army outlined in blue paint is a hundred times larger than the black army, it is extremely poorly equipped, just like the tribal ancestors in ancient times, most of them are dressed in grass skirts, with their breasts exposed.

The black army was menacing and extremely powerful, killing the corpses of the blue ancestors all the way, so that the latter had to retreat to a majestic mountain.

The next picture seems to have been deliberately done by the painter and has become extremely blurry.

It's white.

The painting seems to be a white fog that is so thick that it cannot be dissolved, and even the scorching sun has become dull in this fog.

Yu Tiansuo is a little strange, could it be that there is a heavy fog in the mountains?

He continued to walk forward with the incense, and noticed that the next picture had changed again.

The white mist had become much thinner, and the group of tribal ancestors sketched in blue paint had once again engaged in a fierce battle with the black army in the mountains.

The result this time was no different from the first battle.

Many of the blue ancestors fell to the ground, but none of the black armies were lost.

At this time, the picture changed again.

The blue ancestors, who were defeated one after another, retreated to the top of the mountain.

And the top of the mountain, with countless lines that extend downward, looks like a bottomless abyss.

The blue ancestors kept bowing down to the abyss and throwing chickens, ducks, cows, sheep and other poultry and livestock into it, which looked like they were performing some kind of sacrificial ritual.

But this sacrifice was of no use.

In the next screen, the black army is already surrounding the blue ancestors.

At this time, among the ancestors, many people came out.

These people were painted with white paint, outlining their hair and beards, which appeared to represent the elderly.

These old people prayed as they jumped into the abyss one after another.

Seeing this, Yu Tiansuo's brows furrowed tightly.

On this strange mural, what is depicted at this time is a tragic human sacrifice!

Moreover.

The next picture made his scalp tingle.

When this human sacrifice was completed, a kind of blood mist seemed to emerge from the abyss.

The blood mist spread extremely fast as if it had life, covering the entire mountain in an instant.

Actually, at this point, Yu Tiansuo can still roughly understand.

But in the next picture, he was a little confused.

The situation on the screen seems to span greatly from the previous "blood fog map".

All the black-armored people were lying on the ground.

And the blue ancestors have also lost most of them, replaced by various beasts.

These beasts are also depicted in blue paint.

They first devoured the corpses of all the black armorers, and then, together with the remaining blue ancestors, collected and buried all the people who had died in their own battles, and erected tombstones......

Seeing this, Yu Tiansuo couldn't help but fall into deep thought.

When he first saw the abyss on the mural, he instinctively associated it with Jiulong Yuan, thinking that this mural was telling the origin of Jiulong Yuan.

But what puzzled him was.

Originally, those black-armored people who fell from the sky had overwhelming strength.

But why, after that blood mist gushed out, they all died?

So what really happened in the blood mist?

And in the end, why did most of the blue ancestors suddenly disappear?

What do those blue beasts represent?

A series of questions filled Yu Tiansuo's mind......

He looked back and looked at it a few times, and the more he looked at it, the more he felt that the mural was full of weirdness.

Especially the scene of human sacrifice made him shiver deeply.

That's it!

The incense in Yu Tiansuo's hand suddenly dimmed a little.

The already faint light seemed to be about to be completely extinguished at this time.

Yu Tiansuo's heart was suddenly shocked!

it!

I haven't entered the real Dragon Hidden Hall yet, this Xiangdu Nyima is going to be destroyed!

I'm even going to practice a hammer!

He hurriedly ran back, there was something strange in this corridor, and he didn't want to run into the weirdness that Mo Changfeng said.

But.

Fortunately, after not running a few steps, the incense in Yu Tiansuo's hand miraculously regained its light.

He was stunned at first, and then he was happy.

Grandpa Yu Yuanzhen spent so much effort, and he made a bet and tossed for a long time.

If he knew that he had gone out before he entered the Dragon Hidden Hall, I was afraid that he would have to vomit three liters of blood.

However, this episode also made Yu Tiansuo discover the magic of the incense in his hand.

He still remembered that when the incense was first lit, it was almost a foot long.

But after a long time, it was still a foot long, and it barely became shorter.

At this time, he recalled his grandfather's instructions to bring more water, and he couldn't help but feel relieved.

Sure enough, with the burning speed of this incense, it is no problem to stay here for a month.

Thinking of this, he couldn't help but smile slightly.

Now that the crisis has been resolved, they will walk back to the depths of the corridor.

But!

Strange things happened again, and when he passed by the mural for the second time, the incense was dark again!

Yu Tiansuo couldn't help but shrink his pupils, and quickly retreated again.

However, this time, as the first time, after a few steps of withdrawal, the incense returned to normal.

This made Yu Tiansuo want to swear.

Boy!

What about playing with me?

Looking at the bright incense, he gritted his teeth, regardless of the thirty-seven twenty-one, he directly possessed the martial spirit, and rushed towards the depths of the Yongdao with the highest speed.

Fortunately, this time, the incense was very face-saving, and there was no more moths.

Yu Tiansuo maintained a high-speed state, and ran quickly along the Yongdao for about half an hour, and finally came to the end of the Yongdao.

The sight in front of him couldn't help but make his eyes widen.

It turns out that the so-called real Dragon Hidden Hall is actually just a stone house!

However, after a closer look, Yu Tiansuo discovered the peculiarity of the stone house.

This stone house is directly connected to the mountain wall and protrudes from the outer side of the mountain.

The exit of the corridor is the entrance to this stone house

The mountain wall replaces the wall where the entrance to the house is normally located.

And.

The connection between the stone house and the mountain wall is extremely close, so that the two are almost connected as a whole, without the slightest gap.

At the same time, the mountain wall, and the stone that makes up the stone house, are quite extraordinary.

Yu Tiansuo tapped it with his hand, and he could hear the sound of gold and iron, which was obviously unusually strong.

However, there is another thing that makes Yu Tiansuo quite strange.

This stone house has no windows!

In addition, there is a stone floor on the floor, which is made of the same material as the walls!

In other words, although this stone house is located outside the mountain, it is completely isolated from the world outside the mountain!

This can't help but remind Yu Tiansuo of the air-raid shelter he had seen in his first life.

Thinking of this, he shook his head again.

Bomb shelters, as if not accurate enough.

Here, in fact, it is more like a kind of building in the post-apocalyptic online game.

Shelter!