"Okay, okay!" Zhou Fat'er's face was full of excitement.

The three of them followed Qian Chengming out of the dormitory and walked towards the corner of the castle, where there was a huge circular building. Zhang Yu has been here for several days, and he knows a lot about the buildings here, but this circular building is not clear.

All he knew was that it was heavily guarded, and the building was covered with barriers, and he rarely saw anyone coming in or out.

Qian Chengming handed each of them a special jade pendant, and then walked over with them, perhaps because of the jade pendant, everyone could feel that after the divine sense scanned, the enchantment disappeared.

When they walked into the rotunda, they found it empty, like an empty warehouse.

"There's nothing here?" Zhou Fat'er wondered.

"There should be a mechanism here, right?" Feng Chengyue said tentatively.

Zhang Yu quietly switched the eyes of the ghosts and gods, and sure enough, he saw that in the middle of the emptiness, a huge energy surged out like a fountain.

"Yes, let's go here!" Qian Chengming smiled, he took the three of them to the corner, he chanted a spell against the wall, and with a light tap of his palm, the wall cracked all of a sudden.

Qian Chengming took the lead and walked in, the wall was closed again, and surprisingly they stood inside and waited for a few minutes, just when Zhou Fat'er couldn't help but say something, the wall cracked again, and the scenery outside all changed.

Zhang Yu was slightly surprised, he felt that cultivating immortals was the real Huaxia technology, and just the suspension shuttle boat was much higher than the earth technology.

"This ...... This is the spirit stone?" After Zhou Fat'er walked out, he couldn't help but be stupid when he saw everything in front of him.

"Wow, that's big!"

"This is the spirit stone vein!" Qian Chengming said with a smile.

Zhang Yu swallowed his saliva, all this in front of him was too amazing, only to see that the surroundings were covered with white crystal clusters, the spirit stone was not as sharp as the crystal cluster, it was round and smooth, with a faint light, illuminating the surroundings, the spirit stone veins here are nature's gifts to mankind.

To their bewilderment, there were no people here, only some white spiders crawling around on the spirit stones.

"This ...... What's going on?" Zhang Yu was the first to come to his senses, and he pointed over there.

"These are Spirit Eater Spiders, and they are the best helpers for collecting spirit stones. Qian Chengming said helplessly, through his explanation, Zhang Yu and the others knew that at the beginning, in order to improve efficiency, they also sent people to collect spirit stones, but I don't know why, the quality of the collected spirit stones is too low.

After hundreds of years of research, someone finally proposed to let the Spirit Eater Spider collect spirit stones, and after this plan was proposed, it caused many people to criticize. How can the beast be gathered? All kinds of insults appeared, but later, the man slapped everyone in the face.

Because the Spirit Devouring Spider likes to devour spirit stones the most, it especially likes to dig out spirit stones and store them in the nest, and this kind of spider is particularly timid, there is no toxin, people just need to collect spirit stones on time.

The most important thing is that the spirit stones collected by the Spirit Devouring Spider have special rules, and the quality is much better than that collected by people.

After listening to the explanation, Zhang Yu and the others happened to see some spiders crawling out, going to the spirit stone and keeping busy, and after a while, they gnawed a small piece and left.

According to the regulations, no one can enter here, unless it is the harvest day, someone will go into the spider's lair to collect the spirit stones, concentrate them to a certain extent, and transport them back to the sect.

"It's three months before the harvest day, so you can come and see, okay, that's it for today, let's go back." Qian Chengming said with a smile, and everyone was reluctant to leave.

"Damn, it's all money, such a big lump of money......" After returning to the dormitory, Zhou Fat'er shouted excitedly.

"How many magic weapons, how many pills, how many spells can be bought...... "Zhou Fat'er said with red eyes.

"So what, wash and sleep!" After too long contact, Feng Chengyue also knew what Zhou Fat'er's personality was, and couldn't help rolling his eyes.

"One day, I will have so many spirit stones ......," Zhou Fat'er announced with red eyes before going to bed.

The quality of the spirit stone Zhang Yu knows, don't look at the spirit stone is indeed very large, but unfortunately it is a low-quality spirit stone, which is not worth mentioning.

In the next month or so, Zhang Yu and Zhou Fat'er kept removing the toxins in the bodies of the Black Castle cultivators, and were warmly welcomed by everyone, Zhang Yu also taught this acupuncture method to the doctors of Black Castle itself, which made Zhao Kai very excited, and the overall combat power of Black Castle was improved by one level.

The sect doesn't have to work so hard to cultivate sporadic grass, and each time the other goods escorted can be transported more, everyone is happy.

It's a pity that there are always people who are unhappy, this person is Meng Tiandong, among the many cultivators, he didn't go to Zhang Yu to get rid of the toxin, he sat alone in the room with an extremely gloomy face, although Liu Hansheng gave him an idea, but the plan was not perfect, but there was less of the most important link, how to get Zhang Yu out of the Black Iron Castle.

If Zhang Yu didn't leave the Black Castle, it would be useless to say anything, as long as he left, Meng Tiandong would have countless means to make him disappear mysteriously without being noticed.

"Knock knock!" was a knock at the door as he pondered.

"Who, please come in!" Meng Tiandong frowned and shouted loudly.

Zhang ...... Senior Brother Zhang?Is there something going on?" Seeing the person standing at the door, Meng Tiandong couldn't help but be stunned.

There was an inner disciple standing in front of him, his name was Zhang Weiduan, and he hadn't been in Black Fort for a long time, as if he had come after he came.

He is usually silent, and the two rarely intersect, that is, they have a relationship of several faces. Zhang Duan's luck is not good, every time he goes on a mission, he will always get injured, and the reasons are ridiculous, such as the last time he was hit in the head by a stone when he went out on a mission, and was finally carried back.

Underground, an injury is a drag, and after so many things have happened, many teams don't want him. In the end, he had no choice, he decided to form a team to do the task by himself, and he reported the matter to Zhao Kai, and Zhao Kai also approved it.

"There is indeed something, I would like to ask Senior Brother Meng to do me a favor. Zhang Weiduan said expressionlessly.

"Oh, what's the busy?" Meng Tiandong asked curiously, after all, the other party was an inner disciple, and he could make friends if he could.

"A week later, there will be a peripheral expedition, and I would like to invite Senior Brother Meng to participate. Zhang Duan was very helpless, none of the inner disciples participated, so he had to come next to the outer disciples.

"Adventure!" Meng Tiandong gasped for air, the so-called expedition is to find the ore vein, nine deaths and life, and every expedition will have people die and go missing.

The reward for expeditions is particularly high, with 8,000 points contributed to each expedition mission, which is a huge wealth for Meng Tiandong. The most important thing is that the sect has a rule that it must be led by the inner disciples to go, and with the strength of the sixth layer of Meng Tiandong's qi refining, he can only carry out patrol tasks around the Black Castle.

"This ......" Meng Tiandong hesitated, wealth is eye-catching, but he has to spend his life.

"I'm also here to ask, if Senior Brother Meng is willing, you can come to me in the next few days, okay, I still have something to do, go first." Zhang Duan finished speaking and turned to leave.

Meng Tiandong watched Zhang Duan leave in a daze, and suddenly a thought flashed through his mind, isn't this an opportunity? He became excited, touching his chin and walking around the room thinking.

At this time, Liu Hansheng came to him, and he hurriedly pulled Liu Hansheng to explain the plan, and Liu Hansheng couldn't help but hesitate when he heard it: "Is this too risky?"

"It's worth the risk, it's a rare opportunity. Meng Tiandong gritted his teeth and said.

"This is not a joke...... Liu Hansheng's eyes were full of panic.

"I know what I'm doing, you can get things ready. Meng Tiandong insisted on going his own way.

"Okay, I'll prepare!" Liu Hansheng gritted his teeth, stomped his foot and said, he turned around and walked out the door.