Lin Yun followed far behind, keeping the farthest distance to prevent being discovered too closely.

"At least tens of thousands of souls were absorbed just now, do they need so many souls to refine the elixir?"

Lin Yun asked suspiciously.

"It's a bit strange, it stands to reason that unless it is a large-scale refining, it will not collect souls so aggressively."

Bai Lao is also a little strange.

"Bai Lao, you mean to say that these people are refining pills on a large scale!"

Lin Yun asked.

"No, there are not a few alchemists needed for large-scale refining, and the grade must be high, because refining this elixir requires alchemists to reach the seven-pattern alchemist or above, how many of these alchemists have you seen."

Bai Lao said.

"Go and see, I'd like to see who's doing this."

Lin Yun smiled and walked forward behind a few people.

After about a stick of incense, several people came to a mountain, looked left and right, and walked directly into the mountain.

"How is it possible, no, it's a formation."

Lin Yun was taken aback, but quickly reacted, this should be a formation, hiding the entrance of the cave.

"It's a bit of a hassle."

Lin Yun walked towards the mountain where a few people had disappeared, and at the same time, the Heavenly Eye of the Darkness was also activated, to see if there were any formations or anything like that around him.

Fortunately, apart from this mountain, Lin Yun did not find any other formations, and the formations on the mountain were only at the foot of the mountain. It didn't fill the whole mountain with formations.

This made Lin Yun breathe a sigh of relief, if the formation was a little more complicated, Lin Yun would have no way at all.

Then, Lin Yun rubbed his hands together and began to slowly crack the formation.

A quarter of an hour later, the two formations were cracked by Lin Yun, a gap appeared in the formation, and Lin Yun jumped into it.

"It's hollowing out the whole mountain."

As soon as Lin Yun entered, he was instantly shocked by the entire intricate tunnel.

"Oh my God, there are so many roads, which one to take?"

Lin Yun looked at the pit in front of him in a daze.

"Boy, wait, don't release your soul power."

Just as Lin Yun was about to release his soul power, Bai Lao stopped.

"Why? White old. ”

Lin Yun asked suspiciously.

"It is very likely that the people here collect souls in order to refine the elixir that enhances soul power, so there must be people here who will use soul power, and if you release it, it is very likely that the other party will detect it."

Bai Lao said.

"Yes, yes, yes."

Lin Yun instantly broke out in a cold sweat and withdrew his soul power.

"Babble."

At this time, there was a sound of footsteps on Lin Yun's left hand, and Lin Yun dodged, hiding behind a passage, carefully observing.

After a while, four or five black-robed men came out of the left passage, each holding a gourd in their hands.

The black-robed man didn't notice Lin Yun and entered the interior of the mountain through a passage in the middle.

Lin Yun exerted his qi to the extreme, directly let his aura disappear, and slowly followed behind a few black-robed people, walking inside.

Fortunately, Lin Yun's tracking level was good, and several black-robed people were a little careless, so they didn't notice that a tail appeared behind them.

After walking for about a quarter of an hour, the road of turning left and right made Lin Yun dizzy.

Finally, several black-robed men stopped, and they walked into a huge stone hall, which was very polished and inlaid with countless moonstones, making the whole hall as if it were day, not as dark as the passage.

And the most noticeable thing is that there are small pits dug out of the stone wall, there are tens of thousands, and there is a gourd in each small pit.

"Damn, there are at least 10,000 gourds here, even if each one is loaded with 10,000 souls, there are hundreds of millions here."

Lin Yun clenched his fists.

The black-robed men put the gourd into the small pit without the gourd and left through the other passage.

"Strange, what are they doing here with their souls?"

Lin Yun was a little strange after calming down.

"What is the passage in the back for, those people seem to be a little scared, and they don't even look there."

Lin Yun looked at a bright passage behind him and said.

"Let's take a look."

Lin Yun came out of his hiding place and was about to enter the hall when there was another sound of footsteps.

Lin Yun's outstretched foot immediately retracted, hiding in the dark and secretly observing.

The footsteps approached, and after a while, a black-robed man also came out of the passage behind the hall, and after observing left and right, he picked up two gourds and walked back to the passage.

"Chance."

Lin Yun smiled and quietly followed, but Lin Yun also left a hand, and when passing by the hall, Lin Yun threw out hundreds of rune papers and hid them behind the gourd.

"Hurry up, the soul is not enough."

After walking for a while, a person's voice came from the front.

"Is it coming?"

Lin Yun slowly slowed down and quietly touched it.

There is still a stone hall in the back, but there is only one door, and it is much smaller than the stone hall in front, but it is still brightly lit.

"Soul Palace? Are these people an organization? ”

Lin Yun looked at the door of the stone hall with the words Soul Hall written on it.

Lin Yun was not in the mood to study which force these people belonged to, but quietly looked inside.

But Lin Yun was a little far away, and Lin Yun couldn't see what was inside.

So Lin Yun took a few steps forward and hid behind the door, only then did he see the inside clearly.

A huge formation is painted all over the hall, and in the center of the formation, an iron chain floats in the air, the iron chain is about three zhang long, the thickness of the teacup, made of iron rings interlocking, in one section of the iron chain, is an inverted triangle-shaped dart, with blades on both sides, and at the four corners of the formation, four black-robed people stand there, open a gourd, and put it there.

After a while, the formation was activated, and countless souls were sucked out of the gourd, and they continued to sink into the iron chain in the air, and the runes on the iron chain kept flickering.

And on a high platform on the side, sat a black-robed man, who looked like their leader.

At this time, there was a sound of footsteps behind Lin Yun, and Lin Yun immediately dodged and hidden.

After a while, a black-robed man hurriedly ran in and came to the high platform.

"Hall Master, someone is here."

The black-robed man said to the black-robed man who was seated.

"Your guest has arrived, please."

The seated black-robed man said.

"Yes."

The black-robed man who came in immediately went out.

"Guest, who?"

Lin Yun, who was hiding in the shadows, thought.

After a while, an old man with a childish face walked in.

"Elder Gu's visit is a long way off."

The black-robed man on the high platform stood up and said.

"The hall master is polite, how is the thing I want."

The crane-haired old man asked.

"Elder Gu rest assured, in a quarter of an hour, this soul soldier will be completed."

The black-robed man said.