Time flies!
Seven days had passed, and Yunchuan and Mo Xian'er had just entered the Heaven Beyond Heaven the day before.
We are now heading towards a place called Demon Sealing Valley in the outer world, where the Nine Nether Demon Cave is.
Yunchuan still hasn't woken up yet and is still in the process of enlightenment and cultivation.
After an hour, they arrived at the Demon Sealing Valley and Yunchuan finally opened his eyes.
During these seven days, his realm was also elevated to the fifth level of the mortal immortal realm!
I opened my eyes and looked at what was in front of me, and a strong demonic aura hit me in the face.
"Sister Xian'er, are you there yet?"
Yunchuan spoke softly.
Mo Xian'er then turned to look at Yunchuan, "You woke up Yunchuan."
"Yeah! Just woke up!"
Yunchuan nodded.
"We have arrived at the Demon Sealing Valley. Not far ahead is the Nine Nether Demon Cave."
Mo Xian'er held the map in her hand, on which was marked the location of the Nine Nether Demon Cave.
This was also her first time here. When she was young, the great demon was sealed in the Nine Nether Demon Cave. At that time, she was unable to participate in such a battle at all.
Xiaobai accelerated again, a streak of light flashed by, and soon they arrived at their destination.
Xiaobai also transformed into a human form, still the girl in snow-white clothes.
But at this moment, she no longer looked down on Yunchuan. After all, she also saw the four supreme phenomena that occurred when Yunchuan was practicing that day.
The three of them stood together outside the Nine Nether Demon Cave, an ancient cave entrance, and boundless demonic energy was attacking them.
"Is this the Nine Nether Demon Cave?"
Yunchuan murmured to himself.
The Nine Nether Demon Cave sounds like the name of a cave, and it is indeed a cave, but this cave seems a little too big.
The entrance to the cave is rectangular and its height is probably over one thousand meters!
It is at least several hundred meters wide.
Is this still a cave?
Mo Xian'er was also a little surprised when she came to the Jiuyou Demon Cave for the first time, because the entrance of the cave was indeed too big.
Just as he was about to take two steps forward, a huge demonic energy came out from the demon cave!
"call out!"
Mo Xian'er exuded the aura of the Immortal Emperor, forming a barrier to block the evil energy!
"Just a breath of air can be so terrifying!"
Mo Xian'er said in a deep voice with a serious expression.
This is just the evil energy emitted when it is sealed.
It is conceivable how terrifying this great demon who once stirred up the entire fairyland must have been at his peak.
I'm afraid he is at least a terrifying existence at the peak of the Immortal Emperor realm.
"this…!"
Just at that moment, Yunchuan actually felt a familiar breath.
But I can't remember where I saw it.
"Xiaobai, you stay here, I'll go in and take a look."
Mo Xian'er turned to look at Xiaobai and said in a deep voice.
"Master, it's very dangerous in there, I'm afraid...!"
Xiaobai said with some concern.
"I know, but... we still have to go in and find out what's going on, otherwise it would be a wasted trip."
Mo Xian'er also showed an unprecedented solemn expression.
"I'll go in with you!"
Yunchuan said from behind at this time.
"No, it's too dangerous in there. I might not be able to escape unscathed."
Mo Xian'er said sternly, obviously not joking.
"Believe me, Sister Xian'er, I think I've seen that demonic energy before."
Yunchuan frowned.
"Have you seen it?"
Mo Xian'er asked in confusion.
"Yeah!" Yunchuan nodded.
The evil aura just now was so familiar. I must have seen it somewhere, but I can’t remember where it is at the moment.
Without waiting for Mo Xian'er to speak, Yunchuan took the lead and walked to the entrance of the Jiuyou Demon Cave.
"Let's go, Sister Xian'er."
Yunchuan turned around and said.
There was no other way, Mo Xian'er could only let Yunchuan go in with her.
After the two streams of light flashed several times, the two entered the devil's cave.
The demonic energy is even denser than outside.
"That's right, I have definitely seen this demonic energy somewhere before."
Yunchuan said to himself.
Suddenly, the evil energy attacked again, and Mo Xian'er was prepared to block it.
At this time, Yunchuan has already confirmed that this demonic energy is the breath of the War Demon Bone!
Back in the Penglai area, the Dark Demon Emperor released the same demonic energy as the War Demon Bone did just now, except that the demonic energy displayed by the Dark Demon Emperor was not so pure, but the essence was the same.
“Battle Demon Bone, this demonic energy is exactly the same as the Battle Demon Bone of the ancient great demon, the Battle Demon!”
Yunchuan said in a deep voice.
"Battle Demon Bone? Battle Demon?"
Mo Xian'er didn't quite understand. She had never heard of the War Demon Bone and didn't know who the War Demon was.
"That's right, the War Demon Bones are the sacred objects left behind by the peerless demon War Demon in the Demon Clan. They are the eleven vertebrae of War Demon!"
"I once saw one of these in Penglai!"
Yunchuan explained.
But he was filled with doubts. Shouldn't the War Demon have been dead long ago? Why did the aura of the War Demon Bone appear here?
What's more, the time when the War Demon appeared was the end of the ancient times. At that time, it was tens of millions of years ago, or even close to 100 million years ago!
Is this war demon so long-lived? Can it live for nearly 100 million years?
And according to Mo Xian'er, this great demon was sealed one hundred thousand years ago. The history of Penglai region records that the war demon disappeared as early as ten million years ago.
However, most people believed that the War Demon was killed by someone, and was forced to decompose his body and send the eleven War Demon Bones back to the Demon Clan!
No matter how hard you think about it, you would never imagine that the demon sealed here is a war demon.
Could it be that this great demon also possesses the Demon War Bone?
This was the most convincing scenario Yunchuan could think of.
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