Just when everyone was overjoyed, a black mist as thick as ink suddenly gushed out from the passage that had just been opened.

Not good!

If the mist contains highly poisonous, you will suffer a big loss.

The immortal cultivators present hurriedly retreated to both sides, lest their bodies be contaminated with this black mist that suddenly appeared.

It lasted about a quarter of an hour before the black fog poured out.

Since then, no anomalous phenomena have occurred in the channel.

But everyone hesitated.

Looking at the passage in front of him, which was three feet wide and about two feet high, no one dared to venture into it.

Chu Fan was annoyed by the master just now, and now seeing everyone's cowardly looks, he immediately straightened his waist and said, "What is there to be afraid of, let me go in first to investigate." ”

"In vain, don't be reckless!" Zhong Lifei hurriedly stopped it.

Then he had a rabbit grabbed, tied with a rope tied to its leg, and drove it into the hole.

Everyone nodded when they saw it, thinking that Zhong Lifei's method was good.

Let the rabbit run in the hole for a while, and if it's okay, it means that there is no poison gas or deadly mechanism in the hole.

When the time comes, there will be no risk for everyone to enter the hole again.

After the time of the pillar of incense had passed, Zhongli Fei pulled the rabbit out with a rope in his hand, and found that it was alive and kicking without the slightest discomfort.

At this moment, everyone no longer had any doubts, and they all said that they were safe to enter the cave.

Some diligent people have collected dry firewood everywhere to make torches and distribute them to every immortal cultivator.

Seeing this situation, Zhong Lifei no longer hesitated, and after releasing the rabbit, he ordered Xia Yan to open the way in front and lead everyone into the passage.

Because the passage was too wide, many immortal cultivators could walk inside without dismounting.

Where the firelight lit, everyone was stunned.

The walls of the semi-circular passage are covered with cracks, but they are covered with paint that is tighter than sand, and you can imagine that it was very smooth when it was first built.

At regular intervals, a strange ornament resembling gold and not jade is installed on the surface of the cave wall.

None of the immortal cultivators present knew the origin of those things.

Looking at the ground again, there are potholes and occasional water accumulation, but like the rock wall, there is a thick layer of stone material that cannot be named.

The road that looks like it has been paved with melted rubble has been eroded by the years and is still very hard.

Even if you slash at the ground, you will only leave a shallow mark.

An immortal cultivator said with emotion: "Sure enough, it is a masterpiece of the gods, this passage is thousands of years old, but it is so well preserved!" ”

When everyone heard this, they were amazed.

A trace of consternation flashed in Chu Fan's eyes, he wanted to laugh at everyone, but he couldn't say a word.

At this time, he had already seen that this was actually a traffic tunnel built by modern people!

The strange ornaments on the cave walls are not unusual at all, they are all artificially installed lighting fixtures and ventilation equipment!

Why did such a modern tunnel appear in the elevated ancient world?

Chu Fan was puzzled.

To build such a tunnel, it is by no means a large-scale project that can be completed by a few people who cross it.

It involves scientific and technological knowledge, as well as modern materials and products such as cement, concrete, lamps and lanterns, which cannot be taken locally, but can only be transported from the modern world.

This shows that there were at least hundreds of traversers involved in the construction of the project.

It's incredible that so many time-travelers have come to this world!

But in this world, why are there no stories and legends related to them?

Suddenly, a chill welled up in Chu Fan's body, from the top of his head to the soles of his feet.

A tunnel that has existed for thousands of years, the original travelers have long since turned into dust and disappeared into history without a trace.

And everything they have done, and the purpose behind it, I am afraid that it has become a mystery for the ages, and no one knows.

Chu Fan couldn't help but feel desolate.

Along the way, he kept his eyes wide open, not missing a single corner of the cave.

Seeing him so focused, some immortal cultivators couldn't help but laugh.

These people thought that Chu Fan was too young to see the world, and when they suddenly saw such a strange cave, they were completely dumbfounded.

Chu Fan didn't have time to pay attention to the ridicule around him, he instinctively had a hunch that the traverser who built the tunnel would definitely leave some useful clues in it.

Otherwise, they wouldn't have carved a message on the outside of the mound to remind them to find the entrance to the tunnel.

It didn't take long for Chu Fan to discover a strange phenomenon.

There is nothing left on the ground except for the animal skulls that can be found everywhere, not even garbage.

This anomaly caught Chu Fan's attention, and he picked up a few skulls and found that there were marks of slashing with knives and axes on them.

After walking a little further, Chu Fan stopped in front of a certain cave wall.

On the walls of the cave, which were covered with dust and dirt, large patches of mottled colors could be faintly seen.

Chu Fan suddenly knew that this was a mural, and just about to carefully wipe off the dust and dirt on it, Chun Xue had already waved his hand behind him.

As a gust of incense breeze blows, the plasters fall one after another, and the scene in the painting appears intact.

The crowd was amazed, and all dismounted and gathered together, holding torches.

The dilapidated walls of the cave are full of paintings of humans dressed in strange clothes.

But this has an incomparably intimate sense for Chu Fan.

Because the people in the painting are wearing modern clothes.

At the foreground of the painting is a mountain towering into the sky.

A tall mountain with a strange shape, it looks like a huge monster lying on the ground from a distance.

And the modern people in the painting are all kneeling down to worship this mountain, and their expressions are extremely religious.

As soon as he saw the mountain in the painting, the Void Master's heart suddenly moved, and he took out the treasure map from his arms.

Zhongli Fei walked up to him silently and looked at the treasure map.

Immediately, the people surrounding the Void Master were all surprised.

Because the shape of the mountain in the painting is exactly the same as the Qingqiu Mountain in the treasure map!

"Could it be that this passage was built to facilitate access to Qingqiu?" Someone said in a lost voice.

"It must be like this, otherwise I wouldn't have left this painting here!"

"Haha, so we are the lucky ones chosen by God."

The people were gossiping and talking among themselves.

But Chu Fan's attention is not on the mountains and humans in the painting.

His gaze fell on a few lines of words on the edge of the painting.

"Three begets all things, and all things are one.

It is not the dead who sleep, nor the awake who is alive.

Great and holy Xuan, our humble servants, reverently call to your blood! ”

Seeing this typical summoning spell, Chu Fan was stunned.

In particular, the words of the arrival of the blood deeply stimulated him.

A true god may need animal sacrifices, but he will never thirst for blood.

The truth couldn't be more obvious, this is not an ordinary tunnel, but a place of sacrifice dedicated to evil gods.

The traverser who built the tunnel turned out to be a gang of cultists!

And the god they sacrificed to was the one who was unknown to the world.

Chu Fan's heart was shocked, and he couldn't help but look at the master standing behind the crowd.

Zhong Lifei said with a smile as if he didn't know anything: "What is there to study in a painting, everyone hurry out of the passage, so as not to have an accident if you stay here for a long time." ”

Only then did everyone come to their senses, and they hurriedly held torches and followed Zhongli forward.