Lin Feng and Yuan Bing's tricks stopped.

Originally, the dragon vein aura here should have been completely stabilized, but suddenly, the ground on the third floor of this dragon vein hall shook violently.

The earth shook as if an earthquake was about to occur.

Yuan Bing looked left and right, his brows furrowed.

Lin Feng subconsciously asked.

"What's going on?"

Behind.

Chen Tiesheng also stood up, walked over, and said.

"It can't be, there's an earthquake, right? Why did the mountains shake, Mr. Yuan, has this happened to you here in the north?"

Yuan Bing frowned and said.

"Nope!"

Lin Feng had been quietly observing, he felt that this was definitely not as simple as an earthquake, and he clearly felt that this kind of powerful vibration came from what Yuan Bing said just now, in the depths of the Dragon Vein Hall, where the Divine Investigation Bureau had not yet developed.

He walked straight in that direction.

Walking to the rock wall next to him, Lin Feng motioned to Chen Tiesheng and them to keep quiet first, while he himself closed his eyes and carefully used this mountain listening technique to listen to the movement in the depths of the mountain.

Lin Feng, who closed his eyes, was able to exert his hearing potential to the extreme.

He could hear the situation in the depths of the mountain.

This one listens.

Lin Feng found that this dragon vein hall was probably only a small part of the place where the dragon vein extended here. In the depths of the mountain, there is a larger range, and the mountain cave is afraid that it is several times the size of the entire three layers of the Dragon Vein Hall.

In the depths of the mountain cave, there is a behemoth, constantly crashing and roaring.

But.

There were some chains that locked up the behemoth.

Perhaps, in the depths of this mountain, there should be some kind of extremely powerful alien beast that has been sealed underground.

In addition to this, there is the sound of flames that constantly rumble.

Listen to these.

Lin Feng turned around, looked at Yuan Bing's side, and asked.

"Mr. Yuan, have you been to the depths of this Dragon Vein Hall before?"

Yuan Bing shook his head slightly.

"I haven't been."

"In the depths of the Dragon Vein Hall, the aura suppression is too strong, I can't withstand the pressure of that aura at all, the most time, I only walked more than a hundred meters inside, and I couldn't move another half step. If you go any further, you will fall to the ground and never come back."

Lin Feng nodded slightly, and he continued to ask.

"Mr. Yuan, do you know what's in the depths of this mountain?"

Yuan Bing still shook his head.

"The last Northern Frontier Guardian said that this place is the forbidden place of the Dragon Vein Palace. When the Dragon Vein Hall was first built, it was a seal established by several top masters of the Divine Investigation Bureau, and in this way, there was this Dragon Vein Hall!"

Lin Feng came to be interested.

He then asked.

"The last Northern Frontier Guard, but still in the North?"

Yuan Bing nodded immediately.

"Of course he is, he is the patriarch of the north, and he has always been in the north, so he is naturally my master."

The shaking of the ground continued, and the shaking became more and more violent.

It was as if the mountain below was about to be overturned.

Lin Feng said immediately.

"That...... Can you let me see your master, I have something to ask him! If the vibration of this mountain is too strong, I am afraid that it will cause the collapse of the northern city wall, which is a big deal!"

Yuan Bing naturally knew that this major event was not trivial.

He nodded.

"Of course."

"Steward Lin, I'll take you to see my master!"

Subsequently.

The three of them immediately left this dragon vein hall, and Yuan Bing also issued a notice to let everyone leave this dragon vein hall, no matter whether it was a person on the first or second floor

, or the people in the hall of the dragon vein hall.

Go out of the Dragon Vein Hall.

Soon.

Lin Feng was outside the main hall and saw an old man with white hair and white beard.

The old man has a childish face, and he looks young, but his spirit is very good. Lin Feng and the others didn't go to find Yuan Bing's master, Yuan Bing's master, but they came outside the Dragon Vein Hall first.

The northern city walls in the distance were also trembling violently, and some of the stone bricks of the city walls fell down.

Look further afield.

On this side of the northern realm, the highest peak, that is, the mountain that connects the northern city wall and the northern dragon vein hall, on the top of the mountain, there are purple qi lingering.

The purple qi was like a flame, and it continued to rise into the sky as the ground trembled nearby.

The clouds in the sky turned purple.

When Yuan Bing saw this old man with a childish face, he immediately bowed his hand.

"Master!"

The old man was obviously aware of this abnormality, so he rushed over.

He said immediately.

"No need to be polite."

"What happened, how could this main peak of the northern realm be purple clouds soaring into the sky?"

Yuan Bing didn't know why, he just said.

"Master, I just went to the third floor of the Dragon Vein Hall with the two stewards to practice, but I didn't expect this to happen all of a sudden."

The old man glanced at Lin Feng and Chen Tiesheng and asked again.

"What did you all do?"

Yuan Bing replied.

"I just went through the trick with Steward Lin, nothing else, I didn't do anything."

At this time, the old man looked at Lin Feng seriously and asked.

"I don't know what this steward is called?"

Lin Feng immediately introduced himself.

"Senior, my name is Lin Feng, and I am the manager of the Heavenly Materials and Earth Treasure Department of the Divine Investigation Bureau. This time, I passed through the northern realm, and it happened to be some time, so I entered the dragon vein hall to practice."

"I didn't expect this to happen not long after I entered!"

The old man also quickly bowed his hand.

"It turned out to be Steward Lin, I heard of your name, you were in Beicheng, and you killed King Wu Zheng and Li Qushan, those two former scum of the God Adjustment Bureau, this game, a large chunk of people's hearts!"

Immediately, he also introduced himself and said.

"Old decay, Yi Li, I've seen Steward Lin!"

Lin Feng immediately went forward and returned the salute, so that Yi Li didn't have to be polite, in Lin Feng's opinion, he was a senior.

Afterwards.

Lin Feng heard that it turned out that Yi Li was also the manager of the Divine Investigation Bureau before, and when he was in Beicheng, King Wu Zheng and Li Qushan used various means to harm Yi Li, but fortunately, Yi Li withdrew from the treacherous situation in Beicheng in time and came to the north to save his life.

At that time, Yi Li felt that the Divine Adjustment Bureau was afraid that it would not be long before that.

Now the decline of the Divine Investigation Bureau has long been expected by him.

A few simple greetings.

Lin Feng asked.

"Senior Yi Li, just now, I used the Listening Mountain Technique to listen to the situation in the main peak of the Northern Realm. I heard that within this mountain, under a sealing chain, a huge beast was impacting the sealing chain, and there was a kind of flame burning on its body, and it was also burning the sealing chain, and this purple qi should be born from that thing."

"This earthquake-like movement must have come from it."

"If the alien beast dares to break the seal, it means that the seal left behind back then has been loosened, and I'm afraid it won't last long!"

Lin Feng's words made Yi Li's senior's brows furrow.

Meanwhile.

Beyond the North.

The celestial commissioner of the Holy City also discovered the vision of the main peak of the northern realm.