The gloomy aura made everyone's hearts depressed, as if it had become difficult to breathe.

"Is this the Heavenly Demon Secret Realm?"

Many people raised their heads and looked solemnly at the gloomy aura in the sky.

The Heavenly Demon Secret Realm is opened once in a hundred years, and at this moment, almost ninety-nine percent of the people in the square are seeing this Heavenly Demon Secret Realm for the first time, unless there are some top martial kings who are more than 100 years old.

However, even those top martial kings who were more than 100 years old were just watching from afar outside the square back then, and as for the martial kings who had entered the Heavenly Demon Secret Realm, there were even few.

"Heavenly Demon Secret Realm, it's been a long time since I've felt such a friendly aura!"

And when the aura of the Heavenly Demon Secret Realm emerged, in the crowd outside the square, a person wearing a black cloak suddenly raised his head, his eyes flickered and stared at the Heavenly Demon Secret Realm, his expression was excited, and a trace of different color bloomed from his eyes, and at the same time, a strange aura emanated from his body.

This breath is extremely vague, but it is somewhat similar to the breath in the Heavenly Demon Secret Realm, as if it comes from the same source.

"Huh?"

On the square, Qin Chen seemed to feel something, and suddenly looked at the crowd.

It's just that his gaze swept over, but he didn't find anything unusual, frowned and said, "Is it an illusion?"

Without thinking too much, Qin Chen turned his head to look at the Heavenly Demon Secret Realm.

Buzz Buzz Buzz!

At this moment, the entire Chaotian City suddenly opened, and one after another amazing aura rose into the sky, combining with the gloomy sky.

Thundered!

Under the shocked gaze of everyone, a strange space appeared in the gloomy sky in front of them, and behind that space, there seemed to be an ancient earth looming, exuding a desolate and rich ancient atmosphere.

"What a terrifying aura, is this the Heavenly Demon Secret Realm?"

"Look in the sky, behind that space, there seems to be a continent. ”

"Unbelievable, in the void above our Chaotian City, there is actually a continent hidden?"

"It is said to be a battlefield where our human race and foreign race fight. ”

The crowd was shocked, and one by one their hearts were greatly touched, looking up at the sky, their hearts were surging.

The secret realm belongs to the small space of the ancient era, and there are countless warriors who have explored the secret realm.

Like the Black Death Swamp explored by Qin Chen at the beginning, it is actually a kind of secret realm, and various spaces are layered on top of each other, which is a relic of ancient times.

The original ancient southern capital was naturally also a kind of secret realm, and the palace hidden in the void was extremely terrifying.

But compared to the Heavenly Demon Secret Realm in front of him, these two are a little worse.

The mysterious space above the horizon exudes an infinite vastness of aura, and if people with better eyesight can even see that the end of the endless chaotic void even hides a vast continent.

"Judging from the breath alone, this Heavenly Demon Secret Realm is at least a high-level secret realm, no wonder this Hundred Dynasties Land attaches so much importance to it. ”

Qin Chen had seen too many secret realms in his previous life, and his understanding of the secret realm was far beyond the ordinary, and he clearly felt that the level of this Heavenly Demon Secret Realm was very high, if it weren't for the fact that the strong people above the Martial Emperor couldn't enter, they would definitely be able to attract a large number of Martial Emperors to come.

It's a pity that because of the restriction of the level, this Heavenly Demon Secret Realm is only spread in the land of the Hundred Dynasties, and Qin Chen was in the Martial Domain in his previous life and has not heard of it.

"The aura of this Heavenly Demon Secret Realm is somewhat similar to the original Black Death Swamp and Gu Nandu, is there any connection between these secret realms?"

At the same time, Qin Chen keenly felt that the aura of Gu Nandu, the Black Death Swamp, and the Heavenly Demon Secret Realm were very similar, they were not the same on the surface, but in essence, they were exactly the same.

"Qin Chen, how does Grandpa feel that the breath of this Heavenly Demon Secret Realm is very similar to the Saint Luo Secret Realm of my Northwest Five Kingdoms?"

At this moment, an old voice sounded in Qin Chen's ears, but it was the old man Qin Batian who transmitted the voice to Qin Chen.

"It's similar to the Secret Realm of Saint-Lo?"

Qin Chen was stunned.

The Saint Luo Secret Realm, he had naturally heard of it, was the most powerful secret realm in the Demon Ancestor Mountain Range of the Five Northwest Kingdoms, and many strong people in the Five Kingdoms had entered it for exploration.

However, there are many dangers in it, so many of the powerhouses of the Five Kingdoms have only searched in the periphery and cannot enter the depths.

But among them, there are many relics from before the Dark Ages, Qin Chen remembers that his mysterious rusty sword seems to have been excavated from the secret realm of Saint Luo, until now, Qin Chen has not figured out the true face of his mysterious rusty sword.

There is also the alien demon armor on his body, which was also a strong man in the Dawei Dynasty back then, and was found from a secret realm in the Demon Ancestor Mountain Range.

Obviously, there is a great possibility of that secret realm, which is the secret realm of Saint Luo.

In addition, the prohibition on the alien demon armor is similar to the prohibition of Gu Nandu, and the prohibition of Gu Nandu is exactly the same as the palace stone pillar that Qin Chen saw in the depths of the Black Death Swamp.

The combination of all this made Qin Chen instantly understand that although there were many secret realms near the Land of the Hundred Dynasties of the Northern Heaven Domain, they should actually all originate from the same era in ancient times.

"In this way, it is very likely that all the secret realms are related to the alien races that fought against the human race in ancient times. ”

Qin Chen had a vague guess.

And while he was pondering, Chaotian City's formation finally came into contact with the Heavenly Demon Secret Realm in the sky.

Bang!

The sky instantly tore open a huge opening, and at the same time, a pillar of colorful light descended from the sky, through the pillar of light, you can vaguely see that behind the pillar of light, is a desolate and vast world.

"Hmm, no, this time the passage of the Heavenly Demon Secret Realm is smaller than in the record?"

Suddenly, a low voice sounded, and the face of the official pavilion master of the Tianji Pavilion suddenly changed.

"What's going on?"

Shangguan Lu's exclamation immediately attracted everyone's attention, and they stared at him one after another.

The ancestors of the seven dynasties also looked at it with doubts.

Shangguan Lu's expression was solemn, and a compass-like treasure instantly appeared in his hand, and several of the pointers in it continued to tremble, and finally stopped.

His face turned pale, as if he had seen something unbelievable, and he muttered, "Impossible, how is this possible?"

"Shangguan Lu, what happened?"

"The Heavenly Machine Disk shows that this Heavenly Demon Secret Realm was opened by someone about eighteen years ago, so this time the energy is insufficient, so the teleportation channel opened is only eighty percent of the normal size. Shangguan Lu said with a glare.

"Was it opened eighteen years ago?

Everyone in the Land of Hundred Dynasties was stunned.

The Heavenly Demon Secret Realm is sealed in the void space above Chaotian City, and every hundred years, it will be closest to Chaotian City, and the seal will reach its weakest point before the passage can be opened.

And eighteen years ago, the seal was still intact, how could anyone be able to open the Heavenly Demon Secret Realm.

What's more, even if someone had opened the Heavenly Demon Secret Realm eighteen years ago, the people of Chaotian City would have noticed it, how could it be so quiet?

(三七 Chinese.)