The Hidden Holy City, this is the name of the Imperial City's underground world.

Since this place can be called the Hidden Holy City, with the city as its name, then the area must be not small.

Indeed, when Lei Luo walked around and around the way, avoiding countless spies and inspectors along the way, and walked out of a dark aisle, his eyes suddenly opened up.

It is a huge underground city, covering an area of about 1,000 miles and about 800 miles, and the whole is built under a huge semicircular dome.

There were many irregular concave and convex areas on the high dome, and it was estimated that there should be some buildings above, and there were many suspended stone slabs above the dome.

These stone slabs are no strangers to him, they have appeared in Guanxue City and even in the Xuanyin Sect, these are the steps that have been blessed with the formation and can be suspended and moved.

In other words, there are places within the dynasty that he doesn't know have hidden entrances to this dungeon.

And I haven't found it after coming to the Imperial City for so long, these entrances must be very secret.

The dungeon is in a circular shape, with the outermost buildings being low, and the closer to the center, the taller the buildings, and the center is like a sharp mountain.

According to Lei Luo's visual observation, the spire-like building in the center should be the secret core of this city, and its height is thousands of zhang high, to say the least.

But the building was more of a castle than a minaret, and it stood like a cactus in the center, giving it a very oppressive feeling.

Then he blended into the crowd of people in the city, put on a black hood to cover his body, and used his divine sense to listen to every bit of this dungeon and understand this place.

No one would have thought that there would be such a city under the Sacred Emperor City of Nuoda, and the title of the Hidden Holy City has the meaning of 'Hidden Sage'.

There is a Holy Emperor in the Holy Emperor City, but there is another Holy One in this city, could it be that the master of this place has a counterintention?

"Selling slaves, selling slaves, the barbarians in the southern territory who have just arrived are all high-grade goods, and they only need ten spirit stones each!"

"A high-grade soul crystal, the essence of a foundation building ghost thing, an excellent tonic for yin soul ghost pets and ghost cultivation, a hundred spirit stones!"

"Blood spirit stone, refined from the essence blood of thousands of people, a necessary treasure for blood path monks, only two hundred and fifty spirit stones each!"

"The Heavenly Demon Gate's specialty magic stone, refined from pure demonic qi, a rare demon spirit material during the foundation building period, five hundred spirit stones, first come, first served, while supplies last!"

Lei Luo wandered along the way, and also heard all kinds of information and news, and his position became closer and closer to the center of the city.

However, what made him depressed was that the shops here were all selling things, most of them were spiritual treasures of ghost Dao, demon Dao and Blood Dao cultivators, and even slave trading.

These are all things that Haoran Academy prohibits from selling, and they are actually circulating here, and the business of these things is quite good.

Thinking of this, he walked into the shop that sold 'Blood Spirit Stones', and then bought some Blood Spirit Stones and other Blood Dao Spirit Materials.

Then he went into a few other shops, and bought a lot of copies of those magic stones and so on. After all, these things are not available above, so they can only be purchased below.

After a short time, Lei Luo walked near a fighting arena, and there were bursts of cheers from inside, and there was actually a competition in it.

After he walked in and checked it, he walked out quickly, because the competition inside was a mid-foundation building monk fighting against a third-level demon beast, and this kind of battle was not interesting.

However, he was very curious, because gladiatorial competitions were forbidden in the Imperial City, and the mortal world in the Holy Heavenly Emperor City was dominated by Confucianism, but there were not a few mortals here.

"It seems that everywhere, where there is light, there is darkness, and this hidden holy city is the dark side of the imperial city, and the things that are forbidden above are all circulating goods below!"

His figure walked through the low city in front of him, and gradually approached the hundred-foot high spire city, where the buildings were all extremely high, and the audience for the things sold in it was different.

"The female furnace Ding in the Qi training period, with a good posture, a good posture, a hundred spirit stones per person!"

"During the foundation building period, the beautiful woman repaired the furnace, her appearance was gorgeous and dignified, her qualifications were good, and a thousand spirit stones started to shoot, first come, first served!"

"Origin of the Western Polar Domain Corpse God Sect, the best bronze armor corpse, the best silver armor corpse, accept barter, and buy it quickly!"

"The Blood Demon Hall produces the Blood Spirit Pill, the best elixir for cultivating the Blood Dao Exercises, the first choice for Blood Dao cultivators in the Golden Pill Stage, a two thousand five hundred spirit stones!"

"The Zhensha Stone produced in the Tiansha Sect, if the Jindan Stage Monk is plagued by evil qi, this thing is definitely your first choice to suppress evil qi, starting from a thousand spirit stones!"

Lei Luo paused for a moment, then looked at a blood-colored building like a spire tent, which was the shop that had just sold the 'Heavenly Demon Sect's Town Evil Stone'.

"How do you sell your Evil Stones?" he hurriedly walked over to the man who had just been selling and asked.

"You?, a mere early foundation monk, also need this?" asked the man with a strange look.

They can know that unless they reach the Jindan realm and kill tens of thousands of evil cultivators, they will encounter the heart demon calamity, but the person in front of him has no evil qi fluctuations around him, this is not a joke for him.

This betrayer is not simple, he has the cultivation in the middle of foundation building, and he can also get a good position in the imperial city, but here he is just a seller.

"Do you have any requirements for the buyer's cultivation when you open the door for business?" asked Lei Luo in the same strange tone.

"Not really," the man said, thinking right, and led the man in front of him into the shop.

Inside the shop, there are all kinds of blood-colored stones, as well as some blood-colored magic weapons, and you can feel a strong smell of blood from these magic weapons.

Although the grade of these magic weapons is not high, they are all refined with evil methods, and if these magic weapons are used by Confucian monks, the supernatural powers of a body can only exert one-twelfth of them.

However, if these magic weapons are used by blood path monks or demon path monks, the power of this magic weapon can be increased by one or two layers.

After a while, the seller took out a strange stone with a hint of blood on its surface, and handed it to Lei Luo.

When the stone was in his hands, a strange energy was introduced into his body from the stone, and then the slightly restless evil qi in his body really calmed down a little under this energy.

However, this stone had a limited effect, and it was useless after only a few breaths, and the evil qi that had just calmed down a little in Lei Luo's body began to stir again.

It was as if it was raining on the lake all the time, but a few drops of rain were missing at that moment, and although it weakened little for a heavy rain, it was effective.

And as this energy disappeared, this stone suddenly shattered into fine sand, and then gradually drained from his hands.

"You just used a piece of scraps from the Suppressing Stone, how effective is it?" asked the seller.

"The effect is minimal," Lei Luo confessed.

"Yo, I can't see it, you foundation kid really has evil energy in your body," the betrayer shook his head and muttered.

Then he walked briskly into the storeroom in the back of the store, and in a short time took out a few boxes, and from one of them took out a stone that was six or seven percent blood-colored on the surface.

"This is the anti-evil stone used by the monks of the Jindan period, and one stone can suppress the ordinary calamity for a month, and the ordinary calamity mentioned here is about the level of a hundred slaughters," the betrayer explained.

Lei Luo simply took out a bag of spirit stones, and then handed it to the person in front of him, who took it and counted it, and then nodded to hand him the Demon Suppression Stone.

"Shopkeeper, I'd like to try it out alone, do you have a secret room here?"

"Hmph, I can't see that you kid is hiding deep enough," the betrayer laughed, and then shouted back, "Shopkeeper, someone wants to use the secret room!"

After a while, a black-haired man wearing a blood-colored robe and a sinister face walked out.

"It's just that this kid wants to use the secret room, just a junior in the early stage of foundation building, what kind of evil can he bother!" the shopkeeper complained even more after seeing Lei Luo.

"Pop" a bag of spirit stones was placed on the counter of the store.

The shopkeeper immediately picked it up and counted it, then with a smile on his face, wrapped the stone with a blue brocade handkerchief, and then walked into the store with Lei Luo.

"Hehe, I didn't expect that your kid is still from a big sect, this net worth is not affordable from a small sect, come with me!"

There is indeed a secret room next door to the storehouse, but it is only three zhang in size, and the formation is reinforced around it.

"What are you going to test when the place arrives?" asked the shopkeeper as he reached the entrance to the secret room.

"What is the level of evil qi you are talking about?" asked Lei Luo.

"Of course, it depends on how many people you have slaughtered, but there is a difference in this, generally if you cultivate to a high level and slaughter mortals, those evil qi will grow very weakly, and even disappear on their own in a few months!"

"But if you slaughter a large number of monks of the same rank, then it will lead to the creation of evil spirits, and these evil qi cannot be easily dispelled with ordinary methods!"

"As for the slaughter of 100 people and the slaughter of 1000 people, that is the number of monks of the same level that you kill, of course, if you kill a high-level monk by leaping over the level, the growth of this evil qi will increase several times!"

Lei Luo nodded in understanding, and then said that he would test the concentration of the evil qi.

"Then you kid stand in the circle, use this Evil Guiding Stone to combine with our circle here, and you can detect the concentration by gradually releasing the evil qi," the shopkeeper explained.

He took out a palm-sized cyan stone, wrapped it in a blue brocade handkerchief and handed it to Lei Luo, and made him stand in the center of the chamber.

Then he struck a spell, and a blood-colored circular circle appeared in the secret room above, and this circle was divided into three layers.

According to the shopkeeper's explanation, the three layers of this circle correspond to the three levels of 100 people, 1000 people, and 10,000 people, and this place has been reinforced, so that even the evil qi of the Yuan Infant Stage monk can withstand it.

After hearing this, Lei Luo nodded, and then took the evil stone, took off the blue brocade hand, and began to channel the evil qi in his body.

As he channeled his evil qi, the cyan stone began to glow red and trembled slightly, as if it had sensed something.

"Hum—" A soft trembling sound sounded.

Lei Luo looked up at the upward array, and the circle in the center had been lit up in an instant.

"Yo, this kid cultivated in the early stage of foundation building, and he actually has the strength of a hundred people at the same level, I can't see it, it's really a person who can't be seen!" The shopkeeper looked at the magic circle in front of him and said with a little interest.

Then Lei Luo released more evil energy, and the second layer of the upper magic array also lit up instantly.

This time, the shopkeeper was finally a little moved, after all, it is not easy for a monk in the early stage of foundation building to slaughter a thousand people.

But soon, the light trembling sound struck again, and then in his incredible gaze, the circle above lit up the third circle.

The "buzz" movement this time had turned into a tremor sound, and the Trigger Stone in Lei Luo's hand trembled at an extremely fast frequency.

The cyan stone suddenly exploded into powder, and the magic circle above it gradually extinguished.

The shopkeeper gasped, for this was the first time he had seen a foundation monk who could turn the stone into powder.

Then he showed a strange look on his face, could it be that the person in front of him was some kind of old monster in the infancy stage.

But it is also a little difficult for the old monster in the infancy stage to achieve the level of 10,000 slaughter.

This difficulty is not a matter of the opponent's strength, but that there are not so many people of the same level to slaughter the other party, which Yuan Infant Stage monk does not have some magical powers, if you really want to be slaughtered by ten thousand people in the Yuan Infant Period, it is estimated that it will be those great monks.

But this kid in front of him is not a great monk no matter how you look at it.