While Zhang Yu was studying, outside the sect, a group of inner disciples flew quickly in the sky in a small shuttle boat.

They were all wearing black cloaks, and they stood on the shuttle boat like carvings, their faces expressionless, if Zhang Yu could see them, he would definitely recognize them as ghost kills.

This group of people is Wang Fusheng's team, after they entered the Dandao Sect, they kept inquiring about Zhang Yu's news, but unfortunately they found nothing.

After learning about this matter, they asked them to continue to look for Zhang Yu on the one hand, and on the other hand, to find a suitable position to tear the space, and wait for the resurrection of the Ghost Emperor to prepare for the invasion of the human realm, for cultivators, hundreds of years of time passed in an instant.

"Zhang Duan, this time your task is to go deep into the Black Iron Castle of the Spirit Stone Mine Cave of the Dan Dao Sect to see if you can find a suitable position to open the crack. Wang Fusheng's familiar voice sounded.

"Yes, I'll get the job done. A cloaked monk replied emotionlessly.

The "......" shuttle boat became silent again, and I saw the shuttle boat flying towards the spirit stone mine cave.

This time, more than 20 outer disciples were selected, and for some reason, the others seemed to be very repulsive to Zhang Yu and the others. Zhang Yu also noticed this, and he didn't care about it, just because he was clean. Feng Chengyue and Zhou Fat'er also found out about this situation, and after discussing it secretly, Feng Chengyue used his own channels to investigate, and the results surprised them.

"I found out that this time Steward Liu assigned us to ......the third team," Feng Chengyue said with a gloomy face.

"The third team, does that mean ......" Zhang Yu's heart moved, he had seen in the scroll given to him by Elder Liu, there were three teams of inner disciples stationed in the cave, of which the first team was stationed at the entrance of the cave, the second team was stationed in the second layer, and the third team, which was the most dangerous team, was stationed on the third layer, and the outer disciples like Meng Tiandong who made mistakes were all inside.

Steward Liu must have been uneasy and kind when he assigned them to the third team, Zhang Yu sighed and said slightly apologetically: "It's me who has caused you trouble." ”

"It's okay, if it weren't for you, boss, I wouldn't have mastered the fireball technique so quickly. Zhou Fat'er said nonchalantly, when the group of new outer disciples were still practicing how to control spells, he had already mastered the fireball technique, and the speed was getting faster and faster, almost reaching Zhang Yu's speed.

Of course, only the three of them knew about these things in private, and everyone else thought that they were similar to ordinary outer disciples.

Generally speaking, it takes half a year for an outer disciple to learn a spell, and it is impossible to reach Zhang Yu's level within a few days, and no one will believe it. But it was under Zhang Yu's teaching that Zhou Fat'er had such an achievement, but unfortunately his treatment skills were much worse, and at most he could treat small wounds.

Feng Chengyue's iron cloth shirt is also practiced well, at the moment of danger, he can be golden cloth, ordinary swords can not shake, his spell needs to be practiced for a long time, but Feng Chengyue is more satisfied, at least he knows a few outer disciples who practice iron cloth shirts have told him that this spell will take several years to practice before it can resist ordinary swords.

"Yes, I agree with Fat Brother's words. Feng Chengyue also nodded and said, but he was still worried, after all, the third team was particularly dangerous.

"Don't worry, everything has me!" Zhang Yu said with a smile, maybe it was Zhang Yu's confidence or his magic, Zhou Fat'er and Feng Chengyue blindly trusted him.

At this moment, in the Lingshi Mine Cave, the fortress Black Iron guarded by the third team.

Said to be a fortress, the black iron is just a small castle that chokes the entrance to the fourth floor, and the walls of the castle are full of pitch-black markings, and intricate runes can occasionally be seen carved on the stone walls.

Black Iron had been subjected to a large number of Raging Rat Shocks, but it was still firmly entrenched, and its walls were carved with gravity, once the circle was activated, it would reach up to 20 times the gravity within 100 meters of the castle, enough to crush a large number of Raging Rat into meatloaf.

There is a special early warning circle installed within three kilometers of the castle, and as long as there is wind and grass, it cannot hide from the people in the castle. There are also the most terrifying flaming crossbows on the four-cornered towers, even if you encounter a deep cave python with thick skin and flesh, this flaming crossbow with a range of up to two kilometers can be shot through with a single arrow.

There are also fifty inner disciples in the foundation building period and two hundred outer disciples above the sixth level of qi refining stationed inside, and their strength is strong.

Meng Tiandong has become the leader of the patrol squad due to the successful repeated inspections and the corpses of a large number of rampaging rats, and he has just returned to the accommodation of the Black Iron Castle after completing the patrol, and he saw Liu Hansheng coming over anxiously.

"Is there something wrong?" Meng Tiandong asked as he picked up the water cup and took a sip of water.

"The news from Liu Qingfeng's side has already come back, and he has used a little trick, Zhang Yu will be sent to the Black Iron Castle. Liu Hansheng said with a smile.

"Haha, I've been encountering good things today, good!" Hearing Zhang Yu's name, Meng Tiandong's eyes lit up with hatred.

"But Zhang Yu's strength is too low, the top shouldn't send him to patrol, right?" Liu Hansheng asked a question, after all, Zhang Yu was the third layer of qi refining.

"It's okay, he won't be able to get to Black Iron Castle. Meng Tiandong sneered.

"You mean ......" Liu Hansheng's eyes lit up.

"During this time, the rampaging rats are about to move, and the annual rat tide should come in advance, am I ready for the medicine I asked you to prepare?" Meng Tiandong looked at Liu Hansheng.

"It's been prepared for a long time, these are refined from the glands of the mother rats, and it only takes a drop to make the rats go crazy, and this bottle is the smell that the rats hate. Liu Hansheng cautiously took out two jade bottles and said.

These two bottles of medicine are more expensive than 10,000 gold, and even the sect cannot produce them on a large scale, otherwise the rats would have been extinct.

"Well done, you personally went to the front line of heaven and did this thing. Meng Tiandong said with satisfaction, and he stuffed the jade bottle into Liu Hansheng's hand.

"I'll take care of this when the next wave of supplies is transported, don't worry!" Liu Hansheng carefully put the jade bottle into the ring, and he turned to leave. No one is allowed to enter or leave the castle except for the patrols, and there is logistics to transport supplies down from the upper floor every week.

Liu Hansheng took this opportunity to do tricks, because the new arrivals would come down with supplies.

Soon after the seven days, Zhang Yu and the others were notified to be assigned to the third team, although they already knew, the hot-tempered Feng Chengyue couldn't help but shout: "Why did you arrange us to the third team?"

"Why? Hmph, it's up to you to mess with the wrong people, okay, don't talk nonsense, get me on the boat. Steward Liu said coldly.

"You ......" Feng Chengyue wanted to say something, but Zhang Yu patted his shoulder and shook his head, and he endured it.

They followed the large army on the shuttle boat, and after the personnel and materials went up, they saw the runes flickering outside the shuttle boat, and the shuttle boat quietly rose into the air and disappeared into the distance in an instant.