The Lingshi Mine Cave is about three hundred kilometers west of the sect, and it is extremely desolate.

A branch of the Longteng Mountain Range extends here, and a huge castle can be seen in the distance, this castle is built on the mountain, and the Lingshi Mine Cave is under this castle.

There are special platforms for parking shuttle boats around the castle, and several smaller spaceships are parked in the distance, it seems that they are specially designed to transport goods, and most of the outer disciples came here for the first time, they looked at the castle curiously, and couldn't help but sigh with emotion.

Over time, the castle grew larger and larger, and when the shuttle boat stopped on the platform, the highest point of the castle could barely be seen when it looked up, and it was all obscured by clouds.

"Alright, everyone unload!" said the captain of the shuttle.

The outer disciples all flocked to help carry the goods off the shuttle boat, they put the goods in the designated place, and after the personnel and materials were unloaded, the shuttle boat instantly lifted off and disappeared quickly.

Zhang Yu and the three of them were mixed in the crowd, they looked at this huge castle curiously, this castle is called the sky, and when you look closely, you can see that the castle is all made of black stones, these stones are collected from the spirit stone mine cave, called obsidian, and it is easier to carve formations on it.

Zhang Yu had read the information of the Peerless Castle, which contained at least hundreds of flame crossbows, and the entire castle was a huge magic circle, which could defend against the full force of the cultivators of the Yudan Stage. As long as something happens here, Xia Mingyi will appear here in an instant, so there is no problem with defense.

"My name is Zhao Tianming, I am in charge of this place, everyone is welcome to come here to assist in the development of the spirit stone mine, don't talk nonsense, there is someone here to receive you, you can consult them if you have any questions. At that moment, the loud voice echoed over the castle, and everyone stopped their actions and listened attentively.

"All right, come here for those who read the name. After Elder Zhao Tianming's voice disappeared, the voices around him rang out one after another.

"Zhang Yu, Zhou Tao, Feng Chengyue, come here, ......" A group of outer disciples were called, and they all disappeared into the castle in a small boat, and soon Zhang Yu and the three of them heard someone calling, and they hurriedly ran over.

"You guys get on the Bingding, what questions do you have for the captain. The man said loudly, pointed to the boat not far away, and hurriedly shouted: "Wang Cheng, Wu Hanyang ......"

Zhang Yu and the three of them glanced at each other, and hurriedly walked towards the Bingding.

The Bingding is a floating ship more than one person high, about ten meters long and five or six meters wide, made of wood, on which you can see shining runes.

"Wow, I actually use thousand-year-old sandalwood to make the hull ......" Zhou Fat'er, who knew the goods, couldn't help but be stunned when he saw the hull, and suddenly burst into foul language.

"This little brother is very knowledgeable about goods, help me move those boxes of goods up, and start the ship immediately. At this moment, a big bearded man on the bow of the ship laughed.

Zhang Yu and the others hurriedly carried the boxes of goods, and then jumped on the boat with a slight jump.

"Let me introduce myself, I am the captain of this ship, and I am the one who is called Wang Laoman. Wang Lao said with a hearty smile.

"Hello, my name is ......" Zhou Fat'er was just about to introduce himself, but was interrupted by Wang Laoman.

"Don't tell me your name, hehe, I don't mean anything else, this ship has already transported hundreds of outer disciples down, but less than ten have come back alive. I can't forget their young faces, and I can't forget their names, I'm sorry!" Wang Laoman said with a little sadness.

Many meanings can be heard from Wang Laoman's words, Zhou Fat'er and Feng Chengyue's faces are a little ugly, but Zhang Yu has no expression.

"Okay, sit tight, I'll send you to the Lantian transit station first, and then there will be someone to arrange it inside, by the way, I forgot to tell you, although there are many people who died, but those who came out alive are all inner disciples." Wang Laoman said with a smile, and he stepped into the cab.

In a few moments, the boat slowly began to move towards the castle.

As the boat slowly accelerated, Zhang Yu sat on the bow of the boat, and could clearly feel the strict enchantment in the castle. Zhang Yu could still feel that several of the divine senses of the foundation building period were scanned, and they disappeared after a while.

After passing through these barriers, the boat entered an underground tunnel full of strange stones, which was quite wide at first, and became narrower and narrower at the back, the narrowest place was no more than thirty meters at most, and it was pitch black all around, except for the faint light of the spirit stone lamp on the bow of the boat.

The long fleet moved forward, and you could see the faint light of the stars in front and behind, and only then did you feel not alone.

Occasionally, you can see a faint light coming out of the darkness, the light is getting brighter and brighter, and you can see that it is a small boat, which passes by in an instant, and disappears without a trace.

It is as if the eternal darkness in the universe is very oppressive. Strange and strange sounds can occasionally be heard, and I don't know if it's the wind or what. Only here can you feel the insignificance of people, and always be on guard against something coming out of the darkness.

Zhou Fat'er and Feng Chengyue stayed for a while, but they couldn't stay any longer, so they went under the cabin in a gray manner. Only Zhang Yu sat on the bow of the boat, switching the eyes of ghosts and gods and looking around curiously, and Lin Xueyue and Xiao Hei were also released to wander around.

Footsteps sounded, Zhang Yu looked back, and saw Wang Laoman walking out with two wine bottles.

"Come, drink!" Wang Laoman couldn't help but say, throwing a wine bottle to Zhang Yu.

"Wine, thank you!" Zhang Yu unceremoniously took the wine bottle, opened the lid, and poured a few sips, the wine was spicy in the mouth, like a fire from the throat to the stomach.

"Good amount of wine!hahaha, this wine is a burnt knife made from inferior spiritual potatoes, which is relatively strong, and many people are not used to it, but in this damp cave, it is really the best. Wang Laoman also took a big sip of wine, sat on the bow of the boat and said.

"This tunnel is called the Endless Cave, because the ancestor installed the barrier hundreds of years ago, so it is dark all year round, and many people can't stand the darkness. Wang Laoman looked around and said.

Zhang Yu took a sip of wine when he heard this, nodded, he could feel the infinite depression, but this was actually an enchantment? He asked Lin Xueyue and Xiao Hei, and they didn't feel any discomfort.

"What kind of enchantment is this?" asked Zhang Yu, puzzled.

"I don't know the specifics, it's been hundreds of years. Would you like to go into the cabin and take a break, this is indeed not a place for people. Wang Laoman sighed.

"It's okay, by the way, you said you've been here for many years, can you tell me about the situation in this spirit stone cave?" Zhang Yu said with a snort.

"This is no problem, sometimes there are infinite possibilities to be alive, isn't it?" Wang Laoman looked at Zhang Yu with appreciative eyes, he felt that the young man in front of him was not like other people, he had picked up many outer disciples, most of them were ordinary people, and when he encountered this dark tunnel, he had already hid in the cabin, and no one asked him about the spirit stone mine cave at all.

The two of them sat on the bow of the boat, drinking wine, while chatting about the Lingshi Mine, he would go back and forth once a month, carrying materials and personnel, this mine has become deep and large after hundreds of years of excavation, there are many tunnels, and it is easy for unfamiliar people to get lost when they go in.

After the fleet passes through the tunnel, it will come to the Lantian Transfer Station, which is the transfer station for all materials, and the excavated spirit stones, materials, and personnel are all turned around from here, and it is safe here.

After the personnel are replenished here, it will be a long walk, Zhang Yu will follow the supply team this time, go to the Black Iron Castle on the third floor, and the final goal, and this time the supply captain is also Wang Laoman.

"The real danger starts from the Lantian Transit Station, because of the need to carry supplies, the personnel have to walk slowly, and it takes about a week to get to the destination. Wang Laoman said with an extremely serious expression.

"What's the danger??" Zhang Yu asked curiously.