The formation found in the gray slave's brain made Lu Xuan ecstatic.

To be able to set up such a large formation in the brain of a little demon who was not in the product at the beginning, even if it was a spirit rune formation, it was also an unbelievable thing.

Moreover, the subtlety of this formation, not to mention in the Shaojiao World, even in the Xuancang World, Lu Xuan had never seen it.

Lu Xuan could almost conclude that this must have come from the hand of that senior of the Tianji Gate.

Since entering the Shaojiao World, what Lu Xuan wants to find out most is the whereabouts of this senior, after all, he arrived in the Shaojiao World two thousand years earlier than himself, and what he knows is far beyond Lu Xuan's ability.

He couldn't hold back his excitement any longer, so he found the Nine Shades of Lianjiu.

"I'm going to go out now, and the affairs of the sect will be handled by you, and if there is anything you can discuss, you can go to the Golden Crow Clan's Ulei to discuss. ”

Lian Jiuyou was taken aback, and asked tentatively, "Where is the sect master going, and how long is he going to go?"

Lu Xuan groaned slightly, and said in a deep voice: "This matter is very important to me, and you don't need to ask more." As for how long I'm going, I don't know, but the sect is on track now, and even if I'm not here, it's fine. The Golden Crow Clan's Ulei is the Demon Emperor, and I have set up a Four Spirit Formation around the Mountain of No Return, which can ensure that the sect is not lost. ”

Lian Jiuyou was a little disappointed, but he didn't say anything more after all.

Lu Xuan called Wu Lei and Wu San over again, saying that he was going to leave for a while, and asked Wu Lei and the Jin Wu clan to take care of the Chi Wu Sect.

Wu Lei couldn't help frowning when he heard this, and said: "Lu Daoyou wants to go on the road alone? Now this young prison world is not very peaceful, although Lu Daoyou has great powers, but it is inevitable that there will be dangers, it is better for me to go with you." ”

Lu Xuan shook his head and said, "If you also leave, if there is a strong enemy to attack, who can protect the Chiwu Sect?"

Wu Lei sighed, pointed at Wu San and said, "Since this is the case, Lu Daoyou will take Wu San with you." ”

Wu San also nodded again and again, "Yes, Senior Lu, you can take me with you." ”

Lu Xuan still shook his head and said with a smile: "I understand the kindness of the two, but it is convenient for me to act alone, so there is no need to say much about this matter, in a word, during the time I left, the Chiwu Sect asked the Jinwu clan." ”

As he spoke, Lu Xuan said goodbye to Wu Lei and Wu San, looked at Lian Jiu You, and immediately took off into the air.

......

Out of the Mountain of No Return, Lu Xuan boarded the Star Shuttle.

The location recorded in the gray slave's mind is extremely far away, and it has long been out of the Red Wu Country, and can only be reached as soon as possible with the speed of the star shuttle.

I saw a flash of white light, and the star shuttle was faint.

Three days later, Lu Xuan arrived over a vast expanse of mountains and mountains.

There is no one here, and there are only demons in a radius of thousands of miles, which is obviously a world of demons. Lu Xuan couldn't help but be a little confused, the demons in this young prison world were all affected by ghosts, and they hated human beings to the core. If that predecessor of the Heavenly Machine Gate was here, why would he take such a risk and live next to these demons?

Lu Xuan was puzzled, driving the star shuttle through the void, although there were powerful demons looking at the sky in confusion, but he could only faintly see a flash of spiritual light, and he couldn't see the existence of the star shuttle at all.

But Lu Xuan wandered for two hours, and there was no trace of human beings in the area of 100,000 miles.

Could it be that the gray slave was in the wrong position, or was the predecessor of the Heavenly Machine Gate no longer here?

Lu Xuan's heart was irritable, so he simply didn't look for it randomly, stopped according to the position in the gray slave's mind, and then used an invisibility charm and floated down.

This invisibility talisman is enough to hide from any demon king, but if there is a demon emperor here, Lu Xuan will be in danger.

He didn't care much, and took the gray slave to the top of a majestic mountain, and then opened the Nine Heavenly Eyes to watch carefully.

Still nothing.

Lu Xuan thought for a moment, and then held the gray slave in the palm of his hand.

"There's a very important thing, I want you to help me, but you should be in great pain, will you?"

Lu Xuan looked at the gray slave and asked.

The gray slave blinked and nodded vigorously.

Lu Xuan smiled, "If you help me this time, I will not forget your benefits, and I will repay you ten million times in the future." ”

As he spoke, Lu Xuan stretched out a finger and pointed it on the gray slave's forehead.

The senior of the Tianji Gate set up a formation in the gray slave's mind, hoping that the gray slave could find the immortal stone vein and then bring the news to him. In this case, it may be easier for the gray slave to find the place of the senior than himself.

What the gray slave had in his mind was the spirit rune formation, although it was exquisite, but if Lu Xuan wanted to crack it, it would be easy.

Lu Xuan had already understood the mystery of that formation, so a runic light was imprinted in the gray slave's mind, and he saw that the gray slave's small body suddenly trembled violently.

The gray slave looked extremely painful, and his eyes were full of redness, almost unbearable.

After Lu Xuan broke the formation, he tried to stabilize the gray slave's spirit, otherwise the shock caused by breaking the formation alone would be enough to make the gray slave disappear. Fortunately, the gray slave's pain did not last long, and after a while, the gray slave became calm, and there seemed to be a hint of realization in his small eyes.

It nodded to Lu Xuan, then jumped from Lu Xuan's hand to the ground, and drilled into the ground without saying a word.

"Underground?"

Lu Xuan was stunned for a moment, and hurriedly followed behind the gray slave with the method of retreat.

A moment later, Lu Xuan followed the gray slave straight into the ground for about ten miles, and a huge underground cave suddenly appeared in front of him.

Although this underground cave is magnificent, it looks like it was formed naturally, with stalactites hanging down everywhere, and many poisonous insects, snakes and ants that grow in the shadows, and it does not look like a place for human monks to live in seclusion.

The gray slave was like an old horse, running in a certain direction along the underground cave, and after a while, a huge rock appeared in front of him.

The gray slave stopped in front of the rock and squeaked triumphantly at Lu Xuan.

"This is it?"

Lu Xuan looked at the boulder in front of him in confusion, this boulder was more than ten zhang high, like a small hill, but in this underground cave, bigger than this boulder also abounded, and there was nothing unusual in the slightest.

However, looking at the gray slave's determined appearance, Lu Xuan still opened his Nine Heavenly Eyes and looked at it carefully.

In the blink of an eye, Lu Xuan was stunned suddenly.

In front of this boulder, a portal suddenly appeared, and this portal was shining with spiritual light, and it was actually composed of countless smart and wonderful patterns. Those lines loomed, as if they had spirituality, and they shuttled endlessly.

"Daowen!?"

Lu Xuan exclaimed.

This is clearly the Dao Pattern, the spell method of the Xuancang World, whether it is the Spirit Rune, the Cloud Talisman or the best treasure rune, it is all transformed into the Dao Pattern. It can be said that the tattoo is the pinnacle of the talisman, and no one can touch it unless it is an immortal.

Lu Xuan's heart suddenly bloomed.

At this point, he had fully confirmed that the predecessor of the Heavenly Machine Gate was here.

Two thousand years ago, the predecessor of the Heavenly Machine Gate came from the Xuancang World to the Shaojiao World through the black portal, according to Master Jueli, the senior of the Heavenly Machine Gate forcibly summoned the Heavenly Tribulation at that time and fixed the chaotic void outside the black gate.

In this case, even if the predecessor of the Heavenly Machine Gate failed to become an immortal, he must have realized the realm of the immortal at the moment when the heavenly tribulation came, so it was reasonable that he could realize the Dao pattern.

However, with Lu Xuan's current realm, he couldn't touch the Dao Pattern at all, even if he knew that the portal composed of this Dao Pattern should be the hermitage of the predecessor of the Heavenly Machine Gate, but he couldn't do anything.

He looked at the gray slave.

"Do you have a way to get into this portal?"

Now, Lu Xuan can only hope for the gray slave.

The gray slave nodded and landed in front of the boulder.

Suddenly, a spiritual light poured out from the boulder and landed on the gray slave's body, and the spiritual light flashed twice, and then, a voice suddenly sounded in the boulder.

"It's strange, there are still two years left before the ten-year period, why are there gray slaves coming back?"

With the sound, two middle-aged monks walked out of the boulder in a strange way.

The two of them first glanced at the gray slave, and then frowned.

"How has the appearance of this gray slave changed?"

"There must be a demon when things go wrong, we have to be careful. ”

The two of them suddenly drew their long swords and looked around vigilantly. But Lu Xuan used an invisibility talisman, and with the Taoism of the two of them, Lu Xuan's existence could not be seen. So after a moment, the two of them relaxed a little and looked at the gray slave again.

One of them went over and picked up the gray slave and said, "This gray slave is very strange, let's go and tell Xia Lao Zu immediately." ”

"Brother Wang, go away, I will stay and continue to guard the door. ”

The two of them said so, turned around and walked inside the door.

It's just that they never dreamed that the moment they walked into the door, Lu Xuan had followed him like a ghost.

When Lu Xuan followed the two of them into the Daowen portal, he was taken aback.

He originally thought that behind this patterned portal, there should be an underground cavern with a wider space, but the scene in front of him made him dumbfounded.

That's a vast world!

The sun was shining overhead, and although there was no sun, moon or stars, it was as bright as day. It is full of green mountains and beautiful waters in all directions, and compared with the scene of the outside world, it looks vibrant. Lu Xuan opened his Nine Heavenly Eyes and looked around, he couldn't see the end of this world at all, here, it was far beyond his imagination.

This is...... Secret Realm!?

Lu Xuan couldn't help but be taken aback.

In his previous cognition, there had never been a secret realm in the Shaojiao World, and even several human emperors such as Yun Zhenyue and the Jinwu people such as Wuqi and Wulei all said that they had never heard of it.

What is going on in front of you?

Lu Xuan was at a loss for a while, but just now the royal brother had already taken the gray slave into the air and went straight into the distance, so he had to follow from a distance.

Listening to what the two of them said just now, they were going to take the gray slave to tell Xia Laozu.

In Lu Xuan's mind, that Xia Ancestor was very likely to be the predecessor of the Heavenly Machine Gate.

At this moment, Lu Xuan's heart couldn't help but pound, both happy and a little apprehensive.

Since he really embarked on the path of cultivation in the capital of the Chen Dynasty, this senior of Tianjimen seems to have formed an indissoluble bond with him, but until now, he has not known the name and surname of that senior.

Today, can you finally meet this extremely legendary figure in the Xuancang world?