Meng Chao was certain that the underground part of Black Corner City might be much larger and more complicated than the surface, and he became excited.
He sniffed the unique scent that came from the medicine that was soaked in his cloak. Then, he moved forward agilely like a bat in the darkness where he could not see his fingers.
Every time he reached a fork in the road, he just needed to suck in a few deep breaths and find the correct path based on the density of the scent.
Gradually, after he crawled through a few collapsed tunnels with great difficulty, the walls of the tunnels around him became dry, wide, and sturdy.
The walls of the pipes buried in the shallow part of the ground seemed to be made of bricks or clay. After years of neglect, rain seeped in, and they naturally turned into a mess of mud.
The walls of the pipes deeper underground were made of a lot of materials that were similar to reinforced concrete or metal. After millions of years of corrosion, aside from a few patches of rust, they were still incredibly sturdy.
Every time he crawled through a tunnel, Meng Chao would create a 3D model of an even larger underground pipe system in his mind.
Based on the diameter of the tunnels and the materials of the walls, they were definitely not built for the purpose of draining water.
Meng Chao noticed a facility that was similar to a train in the depths of one of the tunnels.
It was just like the underground transportation system in Dragon City.
He sent a wisp of spirit energy into the "train", and Meng Chao sensed a rather powerful spirit energy magnetic field reaction.
From this, it could be seen that the "train" here was even more advanced than in Dragon City. It used anti-gravity technology that was similar to maglev!
Fortunately, Meng Chao had already seen automatic elevators similar to elevators in Blood Skull Coliseum.
And based on the operating system of the totem armor, he could tell just how advanced the Turan civilization was in the past.
Otherwise, he would not have believed that the ancestors of the high-grade orcs had taken the subway to get to and from work!
Of course, since this place was already one hundred meters underground, normal civilian underground transportation facilities would not be built so deep.
Only military facilities were built one hundred meters underground to fend against destructive attacks like penetrating bombs and nuclear weapons. They were also connected to small military trains.
There was a similar military transportation system under Dragon City.
In the past, after Dragon Citizens transmigrated, they dug out a lot of weapons from Earth through the underground military tracks.
These weapons were originally meant for the third world war, but they armed all Dragon Citizens to the teeth and helped them get through the most difficult period of the monster horde.
Could it be that the underground of Black Corner City was the same?
Meng Chao suddenly stopped moving.
His breathing, heartbeat, and body temperature were suppressed to the minimum, like the shadow of a lizard lurking in the darkness.
Fireflies flickered in front of him, and the sound of digging and drilling became more intense.
From time to time, he could even hear the faint and dull sounds of explosions.
However, on the path that they had to pass through, there were two rat folk with sharp gazes. They had sabers at their waists and were looking back and forth.
They were completely different from the rat people Meng Chao had met before.
It wasn't just because of his stocky build, scarred body, and murderous aura.
In terms of strength and killing intent, there were many rat people in the Blood Skull Arena who had the bloodlines of wild boars and barbaric elephants. They were also tall and ferocious.
However, ordinary rat people would not be as aggressive as them.
This was the unique aura of a predator. Without eight to ten years of hunting and devouring, it was absolutely impossible to condense this aura.
Most of the rat people and warriors didn't look too different in appearance.
For a period of time, Meng Chao could not tell just where they came from.
After thinking about it for a while, Meng Chao closed his eyes.
Aside from his sight, his other senses expanded to the limit as his spirit energy expanded to the limit, allowing him to scan all the things he could use near the tunnel.
He did not even let go of a crack on the wall or an insect in a corner.
Soon, Meng Chao found a group of fat and large rats.
Thanks to Black Corner City instantly surging in ten times the population, over the past few months, the amount of trash discharged underground had also increased by ten times.
Ten times the amount of trash attracted and bred ten times the number of rats.
These rats lived deep underground near the crystal mine. They were nourished by the spirit energy that leaked out day and night, so they were fat and strong. Their fur was as tough as steel needles, and their front teeth were as sharp as guillotines. Their eyes were bloodshot, and they were fierce. They were far more ruthless than normal wild beasts and could be considered as mini monsters. They were not afraid of humans or orcs at all. In fact, they even dared to climb onto the tall and mighty barbaric elephant warriors and crawl between their creases. They were the most difficult to deal with.
Meng Chao gently dug out a stone that was the size of a grain of rice from a crack in the wall.
He bent his finger and flicked it at the rat swarm in the corner of the wall.
It hit the left eye of a large rat and grazed past its eyeball.
The strength he used was perfect. It made the rat's eyeball feel as if it was going to explode, but it did not leave behind a single wound. Even if someone caught the rat, they could forget about finding any traces of it.
The rat screeched in pain, and it instantly caused a ruckus in the entire rat swarm.
Meng Chao intentionally chose the largest rat that looked the fiercest.
Just as he expected, the rat that had gone mad due to the pain started jumping around and biting the rats beside it.
Very soon, the depths of the tunnel were like a pot of boiling oil, filled with squeaks, squeaks, squeaks.
The two guards could not help but be attracted by the rampaging rat swarm.
Just when they went forward to check and focused their attention on the rats all over the ground, Meng Chao quietly jumped over their heads and the ceiling of the tunnel.
Then, he used a different method to create a diversion and take advantage of the chaos to get past three warning lines in a row.
When he turned the next corner, he finally got what he wanted and saw a mining site in full swing.
As far as the eye could see, there were hundreds of strong Rat Folk gathered.
Based on their built bodies and the way they swung their shovels and hammers in a practiced manner, they were not scavengers who did not have the strength to truss a chicken, nor were they children who were still wet behind the ears. Instead, they were trained miners who came from quarries and mines.
Hundreds of ratfolk miners were digging and cleaning up at the end of the collapsed tunnel.
Behind them, at the end of several corridors that had been cleared, stood a bronze gate engraved with cuneiform characters.
"Based on the structure of the building, this looks like an underground warehouse in the Turan civilization a long time ago.
"Behind each bronze door is an independent storeroom."
Meng Chao's heart raced.
He noticed that the first bronze door to the left was not locked. Instead, it was ajar, and there was a crack.
Faint and muffled explosions sounded like thunder from the bottom of the sea. They came from the crack.
In an instant, dense footsteps came from the depths of the bronze door.
Meng Chao quickly curled up even smaller in the shadows. He looked like a black cat that had curled up into a ball of fur.
The axle of the bronze door let out a laborious creak and drew half an arc on the rusty track.
Five Rat Folk clad in soft armor walked out from the inside with large strides.
Meng Chao's pupils shrank swiftly.
He could sense the incredibly dangerous presence of desperadoes from these people.
It was especially so for the person in the lead. He was more than two meters tall and had the head of a rat. His body was even stronger than a rhinoceros', and he looked a little uncoordinated.
Based on how tense his pores were, Meng Chao felt that he was at least at the level of a fighter gang. He was an existence at the same level as the ice storm. Based on Dragon City's standards, he was a Heaven Realm superhuman!
'This is a rat person. At the very least, he has a lot of rat people's blood.
'How interesting. Rat people are clearly the most discriminated against among high-grade orcs. Even normal rat people keep a respectful distance from them and can only work as lowly servants in sugar houses.
'But this rat person managed to reach Heaven Realm. Looks like he either has an ancient legacy or a powerful force of power!'
Meng Chao narrowed his eyes, but his gaze was focused on the wall beside the bronze door. He only used his peripheral vision to observe the rat person.
This was the observation method that Ghost Assassins usually used.
After all, once they reached Heaven Realm, their vitality magnetic fields would become incredibly sensitive, and when someone spied on them, it would be very easy for them to sense it.
Only when they scanned the area with their peripheral vision could they ensure the observer's privacy and safety.
The rat person lifted a rusty, ancient weapon that looked like a long-handled spear or a warhammer. It let out a drawn-out sound and a strange accent.
The rodent miners all stopped working and looked at him with a mixture of respect and admiration.
The rat person held the center of the long-handled spear and swiped his palms at the head and tail of the spear.
Wherever he touched, the rust fell like dust, and the long-handled axe became as bright as new. A string of shining cuneiform characters shone on the handle of the axe.
This scene shocked the rat people, and all of them held their breaths.
When the spear looked as if it had been reforged and shone with a crystalline, fierce light, the rat person's tail suddenly straightened, and it let out a loud crack, as if it had been struck by a whip.
Then, he raised the spear high above his head. His muscles tensed up to the point that they nearly tore apart his armor, and he swung it forward.
Something unbelievable happened.
The crystalline cuneiform words shot out of the spear and gathered together to form a semi-circular arc in front of the spear. It flew more than ten meters away and embedded itself deep into the sturdy wall.
With a bang, the wall that had been buried underground for millions of years but still stood tall and sturdier than reinforced concrete was instantly struck, and white smoke rose from it. It was a terrifying crack.
In the beginning, the crack was only around one meter long.
But the crystalline light was like a burning flame, and it shone in the depths of the crack.
"Kacha, kacha, kacha, kacha, kacha," the cracks continued to spread, penetrating the entire wall and extending to the ceiling and floor!
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