The light inside the demon cave is dim, the demonic energy is surging up from below, and the eerie and terrifying aura is permeating, and the demonic nature is stronger than the outside of the demon cave, I don't know how many times, so Gu Fei has to deal with it carefully.

Gu Fei carefully descended along the stone wall of the cave, with his eyesight, he could only see things hundreds of zhang away at this time, and it would be blurry no matter how far away.

No wonder he found the bones of the immortal martial body and the demon head in the cave under the blue water cold pool, and felt that the entire Taixuan Mountain was a huge demon cave.

Some people are rumored that Taixuan Mountain is the place where the ancient power sealed the demons, and the Taixuan Nine Peaks are not born naturally, but out of artificiality.

It's hard to imagine what earth-shattering things happened back then, did the legendary battle between gods and demons really happen?

Gu Fei didn't know, I'm afraid that only those ancient forces that had inherited endless years knew such a secret.

The Demon Cave seems to be really connected to a Demon Domain, and it has been half an hour, and it has not yet reached the end, which makes Gu Fei frightened and inexplicable, this Demon Cave is too deep.

At this time, the demonic qi around Gu Fei was so thick that it couldn't be dissolved.

The terrifying demonic nature made Gu Fei have to concentrate on resisting, under the demon cave, it seemed that there was really an ancient true demon sleeping, and Gu Fei was approaching this true demon.

The source of the demonic nature can only be the true demon, or the supreme magic weapon left by the Extreme True Demon, no matter what the situation is, it is not a good thing for Gu Fei, you know, this is a Jedi.

It took more than an hour to sink downwards before Gu Fei's feet touched something, which had to shock Gu Fei, this demon cave was too deep to imagine.

"Click!"

Gu Fei stepped on a dry bone, startling himself, and quickly stopped all movements, sensing the movement around him, and there was nothing unusual in the rolling demonic qi.

At this time, Gu Fei breathed a sigh of relief, and then began to look around, he was surprised to find that under his feet, there was actually a thick layer of dry bones, and there were countless bones scattered on the ground, some of which had decayed and turned into bone meal.

The demonic qi was surging all around, and Gu Fei found that at the bottom of the demon cave, it was difficult to discern the direction, and it was easy to get lost when walking in this kind of place.

Gu Fei floated in the air, because his feet were full of dry bones, and it would not be good if he accidentally stepped on the bones on the ground and alarmed the demons under the demon cave.

He sensed the direction from which the demonic nature was coming and fluttered forward, floating silently in this demonic land like a ghost.

Along the way, he not only saw the skeleton that was as bright as divine jade, but also saw the skeleton as black as ink, obviously, it was a fairy bone and a demon bone.

There were once immortals and demons who fell here, could it be that this was an ancient battlefield of gods and demons? Even Gu Fei was startled by this thought he had born.

Otherwise, how could there be fairy bones and demon bones?

Gu Fei continued to move forward, and gradually, a terrible and terrifying demon roar began to come from in front of him, as if there were a group of demons roaring in the depths of this demon land.

Suddenly, Gu Fei's face changed, and he quickly hid behind a big rock.

"Whew!"

At this moment, there was a sound of air stirring in front of him, and a demonic figure rushed out of the demonic fog in front of him and flew backwards.

"This ......"

Gu Fei hid behind the boulder, and saw very clearly that it was not a human being, nor a demonic beast, but a shirtless body with a pair of fleshy wings shaped like bat's wings on his back.

"Demon Man!" Gu Fei walked out from behind the big stone, looked at the direction in which the figure had disappeared, and muttered, it was only at this time that he met a demon man.

This is not a demon cultivated by humans, but another kind of creature, in ancient times, this creature was called a demon race, Gu Fei only happened to see such a description in an ancient classic.

The heavens and the earth are gloomy, there is no sun and moon, and the demonic energy is vast, such a scene seems to be very similar to the way of hell.

But this is not a hell road, but a terrifying demon domain, where thousands of people have fallen, and the earth is covered with white bones, which is really terrifying.

Finding the traces of the demons, Gu Fei was more careful, this is the land of the demons, if he is discovered, there is nowhere to escape, and if he doesn't fight, he can only enter the inner world.

After advancing for hundreds of miles, Gu Fei found a few more demons flying through the air, and the closer he got to the source of that demonic nature, the more frequent the demons appeared.

Moreover, the strength of those demons is comparable to that of demigods, they are one of the oldest races in the world, and they are born with incomparable talents.

Gradually, the demonic aura in front of him became thinner, and suddenly, Gu Fei saw a scene that shocked him, a pitch-black hall appeared in front of him, a large hall floating in the sky, and that demonic aura came from that hall.

It was the source of the demonic nature, a terrible demonic temple.

At this time, the demonic power was extremely powerful, and it was like a supreme true demon lurking in the demon hall in front of him.

That demonic nature made Gu Fei also feel upset for a while, reminding him of the bloody killing scene, that demonic nature, hooked his murderous nature, if it was not for the barrier of the power of the inner heaven and earth, most of the demonic nature was weakened, I am afraid that at this time, he would have fallen into the demon.

Gu Fei found that the demon temple in the sky was not just floating in the air, but was locked in the air by four huge iron chains.

Four chains were wrapped around the temple and hung down from the sky, submerging under the earth.

"Sonorous!"

Suddenly, the demon temple shook, as if it was about to fly into the sky, but it was locked by four iron chains, and the impact sound of the iron chains reverberated between heaven and earth.

"Bump!", "Bump!", "Bump!", "Bump!", ......

A sound like a heartbeat suddenly came from the Demon Temple, and the entire void was shaking with the rhythm of this sound, and the Demon Temple was struggling.

The chains "clanged".

Gu Fei was taken aback by this sudden change.

The power of the demonic nature was several times stronger in an instant, making Gu Fei almost lose his mind and fall into the never-ending killing, even if it was blocked by the power of the inner heaven and earth, that demonic nature still penetrated in, almost hooking his inner demon.

"It's terrifying, what's in there?" Gu Fei was terrified, and he collected his mind to contend with the demonic nature that emanated from the Demon Palace.

"Buzz!"

A quaint Da Ding appeared around him, and Gu Fei attracted the power of the mountains and rivers, so that the demonic nature was immediately greatly weakened.

"Roar!"

At this moment, a terrifying roar came from the depths of this demonic land, and then, a terrifying aura swept out from the depths of the demonic land, lingering between heaven and earth.

"Boom ......"

The heavens and the earth shook, the wind and clouds changed color, and above the dim sky, a huge black shadow appeared, and that black shadow emitted a demonic aura that soared into the sky, swinging away a lot of demonic energy, and quickly approaching the demon hall.

"What is that?" Gu Fei sensed the terrifying aura that was extremely powerful, and his face couldn't help but change greatly, and he hurriedly retreated into the distance.