The dark world of the demon world, this is a place that even the demon world demon clan does not dare to set foot in easily, its existence is too ancient, it is said that it has existed since the distant era of the demon world gods, and it is also called an abandoned place by the demon world demon clan.

And in the heart of the dark world, there is a forbidden place, a huge ancient sword mountain, which is a terrifying place that even the top powers of the dark world do not want to mention.

In the ancient legend of the dark world of the demon world, one day in the middle of the Great Chaos Era, the dark world suddenly descended a giant sword from the sky, and the day it appeared, it pierced the entire sky dome of the dark world into a huge cave.

Then, the Heavenly Sword mysteriously disappeared, and everything returned to peace.

It wasn't until one day at the end of the Great Chaos Age that the peace was shattered and a great event occurred that shocked the dark world.

In the area under the heavenly dome where the original heavenly giant sword descended, a huge sword mountain appeared inexplicably, its appearance was very strange, half of it exuded a majestic and huge masculine sword aura, and half of it was a rich evil aura as black as ink, which looked nondescript.

It was these two forces that erupted with devastating power when they appeared in the Sword Mountain, instantly strangling the living beings within a radius of 100,000 miles in this area, and turning this place into a dead land.

This earth-shattering tragedy immediately attracted the interest of all the top forces in the dark world at that time, and they all agreed that the sword mountain was a shocking treasure, and they all wanted to take it for themselves, and they sent strong people to prepare to find out.

At that moment, an existence exuding a strong evil aura came out of Sword Mountain, blocking the path of all the strong people to advance.

Tell those strong people that the sword mountain belongs to her, and if anyone covets it, he must ask her if the sword in her hand agrees.

Of course, those top forces in the dark world refused, and the two sides fought without saying a word, and the result was obvious, that existence relied on one person, one sword and that peerless swordsmanship, and killed all the top powerhouses who came to covet Sword Mountain.

This incident shocked all the top forces in the dark world, and they all threatened to seek revenge on the one on Sword Mountain.

But no one expected that they hadn't gone to find someone before, but someone else would automatically send them to the door.

According to rumors, the existence on Sword Mountain, after experiencing the great battle when Sword Mountain was born, went to the headquarters of those big forces one by one, and took out all of them and beat them up.

Before leaving, he also threatened them, saying that from now on, all the forces in the dark world will no longer be allowed to approach within a radius of 100,000 miles around Sword Mountain, and there will be no forgiveness for violators!

After that, the great forces of the Dark World no longer dared to covet the existence of Sword Mountain, and also ordered that disciples were strictly forbidden to approach there, and violators were directly expelled from the sect.

In this way, the name of Sword Mountain has become the most unprovoked existence in this dark world.

Time flies, 10,000 years have passed in a blink of an eye.

The deeds that once existed on the Sword Mountain have not been forgotten, but because of that existence, she has frequently appeared in the demon world in the past 10,000 years, and has done many earth-shattering things, making her more and more mysterious under the noisy black back of this dark world, and slowly becoming a legend.

From beginning to end, the bosses of the top forces in the dark world did not know the true name of that existence, only that her cultivation was unfathomable, and her swordsmanship was superb, and she used to use a long sword with a leaf engraved on her body, which was called the Hidden Leaf Sword.

Over time, the Dark World gave her a resounding nickname.

The Sword Emperor of the Long Night!

……

Cao Yao knew that maybe in the land of the five continents of the demon world, the name of the Sword Emperor of the Long Night was not famous enough, not loud enough, and could not scare the monsters.

But if you add another sentence in front of you, if the demon world ranks first on the list of fierce and vicious, it will definitely cause an uproar.

Yes, the Long Night Sword Emperor is the existence that ranks first on the Demon Realm's list of extremely vicious and vicious.

It's a pity that only a very small number of monsters in the current demon world know the true identity of the number one on the vicious list.

Because her origin and past are too mysterious, the official does not know, and it is only said to the outside world that she is a super master who can make swords.

In addition, the Long Night Sword Emperor appeared in the Demon Realm and the five continents several times, and the time was separated by a long time, so that now few people would unite these two identities, and no one would have expected that they would be the same person.

Cao Yao also only learned about the name of this big man by chance, and his mission this time was to invite this super master out of the mountain.

……

Under the Sword Mountain in the center of the dark world of the Demon Realm, Cao Yao was wearing a black robe, looking at the huge Sword Mountain in front of him, which exuded a violent sword aura and a rich evil aura, which was also the culprit that caused the extinction of the 100,000-mile radius in front of him and the lack of grass.

He couldn't help but sigh with emotion in his heart, what a supreme treasure of Zhong Lingyuxiu, but unfortunately the evil spirit is too strong, otherwise it would be better!

It is true that the current Sword Mountain and when it was first born are completely two worlds, after the passage of ten thousand years, most of the sword qi and evil qi on the Sword Mountain have dissipated, only a small part remains in the inside of the Sword Mountain, and more flowers and trees have grown in the appearance, and the greenstone landscape has set off this place into a paradise like a fairyland on earth.

Cao Yao, who seemed to have walked into a fairyland on earth, did not miss these exterior scenes, and walked towards the interior of Sword Mountain with firm steps.

"If you dare to take another step forward, the emperor will cut off your legs. An unfamiliar voice rang out out of nowhere.

Cao Yao's footsteps were stunned, his body shook suddenly, and the hairs on his body were instantly bundled.

"Lord Long Night Sword Emperor has misunderstood, I am not here to visit the mountains and rivers, nor is I here to provoke your authority, this time I came to negotiate a deal with you. Cao Yao hurriedly bowed and said.

"Buying and selling, the emperor has never dared to be interested, where did you come from, where did you go back. ”

"What if this deal is about the answer you've been looking for?"

Boom!

An invisible sword qi hit Cao Yao, making a metal collision sound, and his entire body was like a kite with a broken string, directly thrown ten zhang away.

A green shadow in the interior of Sword Mountain turned into a ray of light and appeared in front of Cao Yao.

Her whole body was wrapped in a green robe, and she couldn't see her face clearly, but a majestic sword aura rose into the sky, and the entire area outside the sword mountain trembled because of this force.

"Say, you know something, if you dare to deceive the emperor, the emperor will make your life worse than death. The Long Night Sword Emperor's indifferent eyes stared straight at Cao Yao and said.

"Flowers bloom for a thousand years, flowers fall for a thousand years, flowers and leaves never disappear, you are still satisfied with this answer. Cao Yao stood up and grinned mysteriously.

The Long Night Sword Emperor's body was stunned, his eyes were glazed, and he seemed to be caught in endless memories.

She hadn't heard it for a long time, and an old man had told her the same thing a long time ago, and she had been looking for it for a long, long time, but unfortunately she had never found the answer.

Because she felt that this sentence was important to her, important, even more than her life.

She has been urging herself not to forget, but she can't think of anything, and her mind is all blank, which is her most helpless and headache.

It was like an unsolvable curse that had tormented her for endless years, and she still hadn't been able to unravel.

Yes, she's looking for an answer, an answer she's forgotten but wants to get back.

Or an object, or a living being, or something else.

"It's not enough, this sentence, the emperor already knows, let's have something else, right?" the Long Night Sword Emperor shook his head.

"That's natural, but the real answer will only be fully told to you until you and I close the deal. Cao Yao said with a sneer.

"Oh, yes! You should know the whereabouts of the deceived emperor! Ugly words are said before, don't think that you are a demon clan, the emperor will not dare to touch you, once afterwards, you don't get the answer that the emperor wants, if you feel deceived, even if you have a great power behind you, the emperor will also be crushed and ashes, and will not die. The Long Night Sword Emperor said coldly.

"That's inevitable, if you dare to come here to do business, you must be fully prepared, in order to show your sincerity, I will send some news to Your Excellency as a meeting gift, the answer you need has appeared in the Demon Court of the Demon Realm!" Cao Yao said seriously.

"Then what do you want me to pay in order to get the rest of the news?" asked the Long Night Sword Emperor suspiciously.

"We only need your help to help us kill a demon clan. Cao Yao said.

"Then who the hell is he? The Emperor doesn't want to be a fool. The Long Night Sword Emperor asked.

Cao Yao took a deep breath and said excitedly, "Demon Emperor!"

"What? It's him, you're sure you're right. The Long Night Sword Emperor said in astonishment.

"That's right, it's the current Lord of the Five Continents of the Demon Realm, the Demon Emperor. Cao Yao replied affirmatively.

"This matter is not trivial, the relationship is too big, the emperor still needs to consider a thing or two, and he can't give you an answer for a while. The Long Night Sword Emperor frowned slightly.

"Okay, I don't know, how long will it take for Lord Long Night Sword Emperor to think about it?" Cao Yao asked.

"One day is enough. The Long Night Sword Emperor pondered for a moment.

Assassinating the Demon Emperor, this matter is too much to do, and the Long Night Sword Emperor has to think about it anew, the consequences of doing this.

After all, he has no grudges with the Demon Emperor in the past, and he has no enmity recently, even if she is now ranked first on the Demon Realm's Fierce and Evil List, it is only jointly issued by the thirty-six vassal states of the Demon Realm, and there is not much direct relationship with the current Demon Emperor.

"Okay, I'm looking forward to your good news in the next place, I hope that the Sword Emperor of the Long Night can make a choice as soon as possible, it's not too early, it's time to say goodbye in the next, this is a communication symbol, if you make a choice, you can contact us anytime and anywhere, let's see you in the demon world!" Cao Yao said calmly.

Immediately, he took out a communication jade talisman from the space storage ring and handed it to the Long Night Sword Emperor, and then walked away.