As the convoy advanced, the tunnel became narrower and narrower, and the tunnel that was originally tens of meters wide became more than ten meters, and the tunnel quickly cracked and holes more and more, and the wind whistled and blew, making it a little difficult for the whole convoy to move forward.

"The vehicle stops, rest for half an hour and then move forward!" Jiang Chaofeng's loud voice came, and the entire convoy stopped at once.

The outer disciples who often take this road popularize knowledge for Zhang Yu, and the special terrain of the sky has created the most terrifying yin wind!

If ordinary people are blown by this yin wind, and the yin qi enters the body, they will have to lie down for at least half a year when they go back. Even a cultivator in the Qi refining period couldn't stand it for half an hour.

Long experience has taught them that the yin wind will blow for at least an hour, calculate the time, and the yin wind has already begun, so when the yin wind stops, they must pass through here immediately.

At this moment, everyone was busy reinforcing the goods, and Zhang Yu suddenly saw several outer disciples and Liu Hansheng coming over, they pretended to inspect the reinforcement circle on the car, and walked to Zhang Yu.

Those outer disciples found an excuse to attract the attention of Zhang Yu and the others, Liu Hansheng glanced at the three of them with a sneer, and seeing that no one was paying attention, he reached into the gap in the goods, opened the bottle cap and poured it, and the liquid in the bottle flowed out.

This liquid is very volatile, and even if someone wants to check it afterwards, they can't find any results, so it can only be said that the three people were too unlucky, and they were killed by rats at once.

The plan looked flawless, and after Liu Hansheng had done all this, he gave a look, and a few people left.

"Is things all right?" said an outer disciple.

"Don't worry, the thing has been poured out, here is the potion, everyone spray it on your body, just wait to see the show!" Liu Hansheng said with a smile, he took out a bottle and sprinkled a little on a few outer disciples and himself.

The smell was instantly emanated, and in a matter of moments, it spread several kilometers away as the violent yin wind poured into the crevices and holes.

No one noticed that the cavity was densely populated with rats, and not far away, two huge lantern-like eyes flickered in the darkness.

A strange sound sounded in the cave, very rhythmic, and a large group of rats seemed to be hypnotized, slowly running into the dark hole under the lantern, as if the process was a mysterious and solemn ceremony.

Unfortunately, as the smell came with the wind, the ritual was broken, and the rat on the edge raised its head and couldn't help but sniff, as if stimulated, it suddenly came to its senses.

"Squeak!" a piercing scream resounded through the cave, and the hypnotized rats were instantly awakened, feeling the pressure of the lantern, and fled in fright.

Most of the rampaging rats smelled the smell, their eyes turned red, and they turned around and rushed over to the smell.

The huge lantern was willing to be disturbed to eat, and scurried around, and for a time the rats were in chaos and fled indiscriminately.

Of course, attracted by the smell of more rats, the monster spun around, watching most of the rats flee in that direction, and couldn't help but follow, its huge body smashing into caves and cracks, and rushing forward.

Zhang Yu frowned, because the clones that Xiao Hei and Lin Xueyue were guarding around had already reported back, and a large number of rats were already in the distance.

For a moment, not only him, but even others felt inappropriate, especially those who often walked this path. Jiang Chaofeng was even more keenly aware that a terrifying monster was approaching, he couldn't help but be furious, and hurriedly shouted: "Prepare to fight!"

"Do you want to ask for help?" asked an inner disciple next to him.

"Call for help immediately!" Jiang Chaofeng replied without hesitation, people can die, but materials cannot be lost.

"Yes!" the inner disciple took out a special firework from the ring, and he shot it out at the first line of heaven.

I saw a bright light source shot out in an instant, quickly passing through the yin wind, and it was about to disappear into the distance, at this moment, the distant rock wall suddenly burst open, and the gray flood gushed out, extinguishing the light source at once.

Seeing this scene, Jiang Chaofeng was taken aback and said, "You continue to send a signal for help, and the others are ready to rain gold and fire!"

As soon as he finished speaking, the inner disciples immediately took action, and in a moment, more than a dozen fireballs flew into the air, and then burst open, and the gray water and the red fire collided at once, splashing huge waves.

It's a pity that there is too much gray water, and the dozen or so fireballs have no effect at all, and the cleared space is filled up at once.

"Keep put!" Jiang Chaofeng looked at the gray waves with an expressionless face, and he roared calmly.

It's a pity that there are too many rats, and they are of no use at all, Liu Hansheng and the others looked at all this with a sneer, they hid behind the car, waiting for the end of the rat tide.

Jiang Chaofeng couldn't see anything on the surface, but he was shocked in his heart, because it was the second time he had seen this gray tide in so many years.

The first time was decades ago, when the Black Iron Castle was built for the first time, many people died in that gray tide, and even a few senior brothers in the foundation building period fell in this battle, he was originally desperate, but fortunately, the reinforcements arrived in time, and he only picked up a life.

Unexpectedly, he would encounter it again this time, and he wanted to turn around and run away, but if he escaped, these people would definitely die without a place to be buried.

He was relieved when he saw the second help-seeking bullet disappear into the distance, and now it was up to luck to see the rescue team arrive in a few minutes.

"Flame Crazy Knife Slash! Kill!" Seeing that the gray tide was about to arrive, Jiang Chaofeng suddenly rose into the air in the spotlight, surrounded by a thick murderous aura, his tongue was like spring thunder, and it exploded in a ray of heaven in an instant.

The body turned into a huge flame knife and slashed at the gray tide in front of him.

"Squeak!" Feeling the great threat, the rats went crazy, and they frantically fled towards the crack in the cave next to them, but unfortunately the flame knife was extremely fast, and it was cut down in an instant, and countless rats were reduced to ashes in the flames. The entire gray tide was cut off in an instant, and the rats in the sky were emptied at once.

"Hooray, hooray!" Seeing Jiang Chaofeng, who was showing his might, the crowd was in high spirits, and they held swords and shields in their hands and cheered loudly.

It's a pity that before he could cheer twice, countless rats rushed over again, as if there was no end, Jiang Chaofeng's blow consumed most of his spiritual power, he sighed slightly when he saw the scene in front of him, swallowed a pill plate and sat on the ground breathing.

"Damn, prepare for battle!" the other inner disciples shouted loudly, and all the outer disciples raised their swords and shields and rushed to the front, breathing quickly as they watched the swarming gray tide.

"Remember, you'll be by my side later!" Zhang Yu looked at the swarming gray tide, turned around and said loudly.

"Okay!" Zhou Fat'er's voice changed at this time, not to mention that his legs were weak and he replied tremblingly.

"Don't worry!" Feng Chengyue was a little better, but his face was also pale, and the fingers holding the sword and shield were overexerted, and they were all pale.

At the same time as the rat swarm stormed the convoy, the signal flare for help was finally seen by the disciples of the Black Iron Castle, and they immediately transmitted the message to Zhao Kai, the castle master of the Black Iron Castle, Zhao Kai was an inner disciple in the late stage of foundation building, and was in charge of the safety of the Black Iron Castle.

He was taken aback when he heard his disciple's report, calculating the time, this should be the time when the material convoy arrived, could it be that something happened to the convoy?

He has known Jiang Chaofeng for many years, and knows that Jiang Chaofeng has a calm personality and will not ask for help until the moment of crisis, so he couldn't help but be shocked and said: "The first level of combat readiness, the third and fourth squads will support me!"

Zhao Kai said and jumped out of the castle suddenly, flying out like an arrow from a string.

Almost at the same time, two groups of cultivators in the Black Iron Castle swarmed out and rushed towards the sky with him.

The Black Iron Castle defensive barrier rose, and under several times the gravity, several lizards that were crawling outside were pressed to the ground and couldn't move.

"Stride, stride!" The sound of neat footsteps sounded, and countless well-trained disciples of the outer sect ran to the castle, and one by one the flame crossbows were pushed out, vigilant, and the black iron castle was like a giant beast lying on the ground, revealing its hideous fangs.