Oh My God! Earthlings are Insane!

After confirming that the underground part of Black-corner City was probably a hundred times larger and more complicated than the underground part, Meng Chao became really excited.

He sniffed the special scent that the cloak gave off after soaking in the secret medicine. In the pitch-black darkness, he advanced nimbly like a bat, undisturbed.

Every time he reached a fork, he only needed to take a few deep breaths. According to the density of the scent, he could always find the right path.

Gradually, after drilling through a few collapsed tunnels with difficulty, the walls of the surrounding tunnels became dry, spacious, and firm.

The walls of the pipes buried in the shallow surface were like bricks or clay. After years of neglect, the rainwater seeped in and naturally became a mess of mud.

The walls of the pipes deeper underground used a large amount of materials like reinforced concrete or even all metal. After thousands of years of erosion, apart from a few pieces of rust growing out, they were still extremely firm.

Every time he passed through a section of the tunnel, Meng Chao would construct a three-dimensional model of an even larger underground pipeline system in his mind.

Judging from the diameter of the tunnel and the materials on the walls, the purpose of the tunnel was certainly not to drain the sewage.

Meng Chao also found facilities that looked like railway tracks in the mud deep inside a section of the tunnel.

It was just like Dragon City’s underground railway line.

After injecting a stream of spirit energy into the “railway,” Meng Chao sensed a rather intense spiritual and magnetic reaction.

From this, it could be seen that the “railway” there was even more advanced than that in Dragon City, adopting anti-gravity technology similar to magnetic levitation!

Fortunately, Meng Chao had already seen the automatic equipment similar to an elevator in the Blood Skull Arena.

Moreover, from the totem armor’s operating system, he could see how advanced the Turan civilization was in the past.

Otherwise, he would not have believed that the ancestors of the advanced orcs had also taken the subway to work!

Of course, given that this place was already a hundred meters underground, normal civilian underground transportation facilities would not be built so deep.

Only military facilities, in order to guard against destructive attacks such as underground bombs and nuclear weapons, would be built a hundred meters underground and connected with small military trains.

There was a similar military transportation system under Dragon City.

Back then, after transmigrating, the people of Dragon City dug out many earth-era weapons along the underground military track.

These weapons, which were originally prepared for the Third World War, helped all the people of Dragon city arm themselves to the teeth and survive the most difficult period of the Beast Tide.

Could it be that the underground of Black-corner city was the same?

Meng Chao suddenly stopped moving.

His breathing, heartbeat, and body temperature had all been restrained to the limit, and he was like the shadow of a lizard, lurking in the darkness.

Fireflies were shining in front of him, and the sounds of digging and drilling became denser.

Occasionally, one could hear the sound of a faint and dull explosion.

However, on the way to the place where the sounds were denser, there were two rat subjects with sharp eyes, who were carrying battle sabers at their waists and scanning back and forth.

They were completely different from the rat subjects that Meng Chao had seen before.

It was not just because they were strong and stocky, full of scars, and full of killing intent.

In terms of strength and killing intent, there were many rat subjects in the Blood Skull Arena, who had the bloodline of wild boars and barbarian elephants. They were also very tall and strong, and they looked very fierce.

However, ordinary rat subjects would never be as aggressive as they were.

This was the unique aura of a predator. It could never be condensed without ten or eight years of hunting and devouring.

Most of the rat subjects and warriors did not look too different from each other.

For a moment, Meng Chao could not tell where they came from.

After pondering for a moment, Meng Chao closed his eyes.

His senses, other than his vision, had been expanded to the limit along with his spirit power, which allowed him to scan everything that could be used in the vicinity of the tunnel.

He did not even spare a single insect in the corner of the wall.

Soon, Meng Chao found a group of big and fat rat people.

Thanks to the ten times population that had flooded into Black-corner City in the blink of an eye, the amount of garbage that had been discharged underground in the past few months had also increased tenfold.

Ten times the amount of garbage had attracted and bred ten times more rats.

These rats grew in the depths of the underground near the crystal ore vein and were nourished by the spirit energy that leaked out day and night. They grew fat and strong, their hair was as hard as steel needles, and their front teeth were as sharp as guillotines, their red eyes were filled with ferocity, and they were far more ruthless than ordinary beasts. They could be considered small-sized monsters that were not afraid of humans and orcs at all. They even dared to climb onto a tall and mighty barbarian elephant warriors. They were the most difficult to deal with as they crawled between the wrinkles on the barbarian elephant man’s body.

Meng Chao gently dug out a rock that was not much bigger than a grain of rice from a crack in the wall.

He bent his finger and flicked it towards the group of rats at the corner of the wall.

It hit the left eye of a large rat and brushed past its eyeball.

The strength was grasped perfectly. It caused its eyeball to feel a burst of pain without leaving any scars. Even if someone caught this large rat, they would not be able to find any trace of it.

The giant rat squeaked in pain, which immediately caused a riot among the rats.

Meng Chao deliberately picked the biggest and most ferocious-looking giant rat.

As expected, the giant rat, which was crazy due to the intense pain, began to jump around and bite the rats beside it.

Soon, the deep end of the tunnel was filled with squeaks and shrieks like boiling oil.

The attention of the two guards could not help but be attracted by the chaotic rats.

Just as they stepped forward to check, and their attention was focused on the rats on the ground, Meng Chao silently swept past them from the ceiling of the tunnel above their heads.

He used different methods to create a diversion and fish in troubled waters, breaking through three warning lines in a row.

At the next corner, he finally got what he wanted and saw the bustling work site.

Within the range of his vision, there were hundreds of strong rats.

From their strong bodies and skilled posture of wielding shovels and iron rods, they were not weak garbage worms, nor were they immature children. They were from quarries and mining caves, well-trained miners.

Hundreds of rat miners were digging and cleaning at the end of the collapsed tunnels.

Behind them, at the end of the tunnels that had been cleared, there were bronze doors carved with cuneiform characters.

“Judging from the structure, this place looks like a Turan civilization underground warehouse from a long time ago.

“Behind every bronze door is an independent warehouse.”

Meng Chao’s heart was pounding.

He noticed that the first bronze door on the left was not locked. Instead, it was half-opened, leaving a gap.

The faint and dull explosion sounded like thunder from the bottom of the sea. It was coming out from the gap.

Not long after, dense footsteps came from the depths of the bronze door.

Meng Chao hurriedly shrunk his body in the shadows like a black cat that had curled up into a ball of fur.

The shaft of the bronze gate made a difficult creaking sound and drew half an arc on the rusted track.

Five rat subjects in soft armor strode out.

Meng Chao’s pupils suddenly constricted.

He could smell the extremely dangerous aura of an outlaw from these people.

This was especially so for the leader, who was more than two meters tall and had the head of a rat, but was even stronger than a rhinoceros. He seemed a little out of place.

Judging from the tenseness of the hair all over his body, Meng Chao felt that he was at least a gang-level powerhouse, an existence on the same level as Ice Storm. Based on the standards of the Dragon City civilization, he was a Heaven Realm powerhouse!

“This is a rat man, with at least a large amount of rat man blood.

“How interesting. Rat men are obviously the most discriminated existence among advanced orcs. Even ordinary rat people keep a respectful distance from them, and they can only engage in menial jobs such as being sugar house servants.

“This rat man can cultivate to the heavenly-tier. It seems that he either has an ancient inheritance or relies on a powerful force!”

Meng Chao narrowed his eyes, but his gaze was focused on the wall beside the bronze door. He only used the corner of his eye to slowly scan the rat man expert.

This was the usual observation method used by the Ghost Assassin because after reaching the Heaven Realm, one’s vitality magnetic field would become extremely sharp.

When someone was spying on them, it was very easy for them to sense it.

Using the corner of his eye to scan, he could ensure the privacy and safety of the observer.

The rat man expert raised a rusty ancient weapon that looked like a long-handled ax spear and a war hammer. There was some sound coming from his tail, and he let out a strange cry.

The rat miners stopped their work one after another and looked at him with both respect and worship.

The rat man expert grabbed the middle part of the long-handled ax .Then he wiped the ax head and end with his palms.

The rust on the parts that he had swiped was scattered like dust. The long-handled ax became as shiny as new, and the handle of the ax was even more shining with a string of dazzling cuneiform characters.

The scene greatly shocked the rat slave workers, and everyone held their breaths.

When the entire long-handled ax seemed to have been forged once again, emitting a crystal clear and fierce glow, the rat man expert’s tail suddenly straightened, and it emitted a “pa” sound like a whip.

Immediately after, he raised the battle ax high above his head. The muscles all over his body tensed up, almost tearing apart his armor as he swung it forward heavily.

An unbelievable thing happened.

Crystal-clear cuneiform characters whizzed out from the battle ax. They condensed into a semi-circular arc of light in front of the battle ax and flew over ten meters away before deeply embedding themselves into the wall that was as hard as iron.

With a boom, the wall that had been buried underground for tens of millions of years and was still standing, which was even sturdier than reinforced concrete, was suddenly hacked into a shocking crack that was emitting white smoke.

At the beginning, the crack was only about a meter long.

However, the crystal-clear light was still shining in the depths of the crack like raging flames.

With the sounds of rupture, the crack continued to spread and actually made its way to the entire wall, the ceiling, and the ground!