After he left Meng Tiandong's residence, he went straight to the pill room in Black Castle, and since he was a logistics manager, he was able to enter by virtue of his identity.

When he left, no one noticed that on the corner shelf of the pill room, a bottle of poisonous scorpion extract had disappeared without a trace.

That night, Meng Tiandong agreed to Zhang Duan's request and joined the expedition team, Zhang Duan was also an inner disciple, and by virtue of his identity, he gathered more than ten outer disciples with the highest cultivation.

The next day, Zhang Duan gathered everyone, took over the task, received the equipment pill, and walked towards the gate of the Black Castle.

"Is that Meng Tiandong?" Zhang Yu stood in the room and looked, just when he saw Meng Tiandong's familiar figure, he couldn't help muttering.

"I don't know if it's an illusion, but I always feel that there is a familiar ghost atmosphere underground. Xiao Hei popped out half of his head, his nose kept sniffing in the air, and he said suspiciously.

"Ghost Domain Breath?" Zhang Yu's face changed greatly when he heard this, he hurriedly switched the eyes of ghosts and gods to look over, and could vaguely see a thick black gas bubbling from the back of a group of teams.

It's a pity that before Zhang Yu could see who it was, Meng Tiandong's team had already left the Black Fort and disappeared into the dark and oppressive underground tunnel.

Could it be that the people from the Ghost Domain have also invaded the interior of the Dan Dao Sect? Zhang Yu was in a very heavy mood, if the people from the Ghost Domain really came, it would not be safe here, and he had to find a way to restore his strength.

The black back made Zhang Yu anxious, he thought for a moment and decided to find Qian Chengming for some information.

"The team you said left today? That's Senior Brother Zhang's team. Speaking of my senior brother, alas, it was okay in the past, but I don't know what's going on recently, as if I have changed as a person, I have a gloomy face every day, and I can't say a word for a long time after chatting with him a few times, I really don't know what's going on?" Qian Chengming sighed and said.

"It's nothing, but he's been injured every time, and someone has suggested that he be transferred back to the sect, don't lose his life here in vain. ”

"I see, then they are going to ......"

"Looking for ore veins, every inner disciple has a task, and they must go to find it once a month, the task is quite heavy, but this time they went to the Yin Wind Cave, there should be nothing to do. ”

After chatting with Qian Chengming for a while, Zhang Yu learned that the so-called Yin Feng Cave was a particularly long crack, and the sect sent two teams to go there, and they had explored for nearly half a month without success, and many people thought that there were no veins in it.

Just when Zhang Yu had the heart to get the news from Qian Chengming, Zhang's team ran wildly for a day, and finally came to the camping site in the wild. For the sake of safety, the disciples of the sect built a spider web-like node with the Black Fort as the center, each node was a day's distance, and a simple camp was built with stones on the node.

In the evening of the dantian, they rested at the Bingding node, except for the vigilant disciples, the other disciples prepared meals, although the future was very dangerous, but the high contribution made all the disciples discuss with great interest, how to spend this high contribution.

In the camping point, Meng Tiandong held the food and gnawed silently, he inadvertently touched the bottle in his arms with his hand, and occasionally raised his head to look at the end of Zhang sitting on the high place of the camping point.

Zhang was silent, he sat high and stared into the distance, not knowing what he was thinking.

He sat for most of the day, and only after the disciples below had rested did he slowly walk down. After he stepped down, he made a strange gesture, and clouds of invisible black qi appeared in midair, and these black qi quickly flew towards those disciples.

Those black qi continued to rotate around the disciples' bodies, as if they felt a chill, and some people couldn't help but turn over.

"No?" Zhang Wei frowned, and as soon as he beckoned, the black qi flew back into his body in an instant.

In order to complete the master's order and find Zhang Yu, several of them possessed the inner disciples, and carefully lurked in the Dandao Sect, looking for them, but unfortunately they found nothing.

This time he came to the Black Castle to find Zhang Yu, and he also had other purposes, to see if he could find a suitable place under the Black Castle to tear up the space and establish a passage to the Ghost Domain.

"Alas!" Zhang Duan sighed and turned to leave.

What the hell is he doing? Just after Zhang Duan left, Meng Tiandong opened his eyes suddenly, he could feel that he was wrapped in the cold just now, and he was very curious about Zhang Duan's behavior. But in a moment, he was covered with hatred for Zhang Yu, and he had to find a way to make Zhang end hurt.

After resting for a few hours, they came to their senses and continued their journey towards the Cave of the Wind, and after resting twice, they came to the Cave of the Wind, where a long crack stretched out of the ground, and it was pitch black and they didn't know where they had arrived or what monsters were inside.

"This is the Yin Feng Tunnel, and everyone should be very vigilant about the next road. Zhang said, standing on the edge of the crack.

"Yes!" everyone was shocked and couldn't help shouting.

"Okay, let's go!" Zhang Duan nodded, and jumped into the crack first, his sensitivity stepped on the protrusion of the stone wall at the edge of the crack and jumped downward, and the outer disciples all followed his example and jumped down.

I don't know how long it took, but it was at the bottom of the crack, and everyone looked up at the sky, and it was pitch black.

The cold wind lingers here, and occasionally strange sounds can be heard echoing through the cracks, which is creepy.

"In order to save time, now the team must be divided into two teams, one to that side and one to this side, and to retreat immediately if there is danger, and after three days if there is no danger. Zhang said at the end, and his words made the team members look at each other.

"Starve the cowardly, support the bold, think about it, if you find the ore vein, the sect will reward 100,000 contribution points......" Zhang Duan's words were extremely encouraging, and the outer disciples who heard the 100,000 contribution were all short of breath.

"Yes, starve the faint-hearted, support the bold, I am in favor of looking for them separately. An outer disciple of the eighth layer of qi refining stood up and said.

"Yes, yes, I approve of it too!" they said when they saw that there was a leader, and the conformity of human beings was vividly embodied.

"In order to ensure your safety, I only need two disciples on my side, who wants to follow me?" Zhang Duan continued.

"I'm willing!" Meng Tiandong hurriedly said.

"I'm willing too!" Another disciple named Chen Feng also said, everyone knew that it was safer to follow the inner disciples, but unfortunately Zhang only needed two people, and those who didn't speak in time were secretly remorseful.

"Okay, you two follow me, and the rest have Zhou Ming as the captain, and you all have to listen to him. Zhang Duan pointed to the disciple of the eighth layer of qi refining and said.

After a few simple explanations, Zhou Ming's meritorious service was in a hurry, and he turned around and disappeared into the darkness with everyone.

"Let's go too!" Zhang Duan glanced at the darkness and led the two of them away.

Exploration is a matter of luck, and it is even more difficult to find ore veins, this mine has been mined for hundreds of years, and the spirit stones in it have been mined almost completely, unless new ore veins are found, this mine will disappear and be abandoned in a few decades.

Without this kind of economic source, it is very likely that the Dan Dao Sect will decline, and coupled with the ghost domain watching from the side, this makes the Dan Dao Sect have to change.

It's a pity that what they don't know is that the interior of the Dan Dao Sect has been invaded by the ghost killers of the Ghost Domain.

followed Zhang Duan for no less than two days, and now only Meng Tiandong followed Zhang Duan, he looked around in a panic, for fear that some monster would appear.

Because Chen Feng is dead!