About five minutes later, Xie Yunfei told us good news over the walkie-talkie, and he learned that the slaves here had dug up a black slurry when they were carrying out the secret project, and this black mud had a pungent smell and was very easy to ignite, and the slaves thought that this mud might be useful in the future, so they secretly collected it.

After listening to what Xie Yunfei said, Wen Qingshan immediately understood what that black mud-like thing was, which was crude oil, commonly known as black gold!

Crude oil is a black-brown or dark green viscous liquid or semi-solid combustible substance composed of various hydrocarbons. The flammability varies depending on the purity, and the crude oil found by the slaves may not be too pure, so it is in the form of mud, but it is just right to make zuò rockets.

Now that the flammable substance has been found, without further ado, Wen Qingshan immediately asked Xie Yunfei to organize the slaves to make the rocket, the method of making the rocket is very simple, just wrap the arrow with a strip of cloth soaked in crude oil, of course, in this ghost place, the strip of cloth is a rare thing, so the slaves used giant rat fur instead of strips of cloth.

The slaves worked together, some were responsible for fetching the crude oil, others were responsible for dividing the giant rat's fur into strips, and in a short time, the rocket was ready. However, due to the height of the cave roof, if you shoot directly at the giant spider entrenched on the top of the cave, the arrow may not be able to reach, so you can only wait for the giant spider to attack before counterattacking.

Everything is ready, just waiting for the demons to attack us.

However, the demons did not seem to be in a hurry to attack us, but only surrounded us, and we waited patiently for more than two hours in a tense mood, but the demons still did not attack, and everyone's feelings gradually became agitated.

Long Yi couldn't help frowning and said, "The demons besiege us but do not attack, on the one hand, they are waiting for their army to arrive, and on the other hand, I am afraid that it is to break our fighting spirit, so it is not good for us to wear them down. ”

Wen Qingshan nodded and said, "That's right, it won't be long before the demon army of the Heavenly Wolf Castle arrives, and then the pressure on us to defend the city will increase greatly." ”

After listening to Long Yi and Wen Qingshan's analysis, Chen Biao on the side opened his mouth and said: "In this case, it is better for us to take the initiative to attack now, as the so-called surprise attack is unprepared, a few of us will lead a small team to kill them, and kill them by surprise!" ”

As soon as his words fell, Long Yi immediately waved his hand and said: "This is not good, you are the main force of guarding, once you leave, it will be difficult to hold this city tower." ”

"But if you blindly stick to it, I'm afraid it's also a dead end! Instead of sitting back and waiting, it is better to strike first! ”

"But we take the initiative to attack, and we are not sure of winning, and the only thing we can do at the moment is to hold this place to the death, and then make plans!"

Long Yi and Chen Biao argued, and Wen Qingshan hurriedly opened his mouth to persuade him: "The two of you have a point, in my opinion, it is important to hold this place, but we should also take action, and we can't sit here and wait for death." ”

Long must have calmed down, and asked from Wen Qingshan, "What does Mr. Wen think?" ”

"I think we should indeed organize a small team to sneak to the Sirius Castle while the demons are collectively dispatched."

"But now that the demons have surrounded this place, how can we sneak into the Sirius Castle?" Ryuyi asked.

"We can follow Captain Chen's idea and take the initiative to launch a fierce attack on the demons, and then a small team will take advantage of the chaos to sneak into the intricate cave system from the same way and go around to the vicinity of the Sky Wolf Castle."

Hearing what Wen Qingshan said, Long Yi pondered for a moment, frowned and said, "This method seems to be feasible, but these owl monsters are really difficult to deal with, and there is a possibility that there are human wolf beasts ambushed at the mouth of the canyon." If we rush out, we may face a two-sided attack from the ground and the air, and if we don't get it well, we will not only not be able to enter the cave smoothly, but we are afraid that we will suffer heavy losses. ”

I looked up at the silver dragon that was still hovering back and forth in mid-air, and suddenly I had an idea and said, "I have a way!" ”

Everyone immediately turned to look at me.

I said, "Let the silver dragon rush with us, the demons are very afraid of the silver dragon, and they will be in chaos, so that we can take advantage of the chaos to sneak into that cave." ”

After listening to what I said, Wen Qingshan nodded: "Shi Yu's idea is good!" However, in order not to attract the attention of the demons, we must not have too many people infiltrating the cave, and we must control it within ten people. ”

As soon as he finished speaking, the old ghost on the side said, "I'll go with you with Leng Boy!" The cold boy he is talking about refers to Long Jiansheng, this guy always looks cold, so the old ghost sometimes calls him cold boy, but even if he calls him so in front of him, he doesn't seem to care at all.

"Hehe, if the old ghost seniors and the Jiansheng brothers are willing to go along, it will naturally be great." Wen Qingshan turned to Chen Biao again and said, "Captain Chen, I still need to borrow a special combat team member from you, it is still necessary to have an automatic weapon in the team, and sometimes it is better to use a gun." ”

Chen Biao swept the special combat team members beside him, and before he could decide who to let go with him, Li Guo volunteered to stand up: "Just let me go!" I've got to get my big brother out of here. Li Guo thought about his comrade-in-arms Seabeard.

"Then there's Captain Laury." Wen Qingshan turned his head again and asked Xie Yunfei: "Brother Yunfei, you have been in the Heavenly Wolf Castle before, and you are familiar with it, or you will be our guide." ”

Xie Yunfei said: "I can go with you!" But when it comes to guides, there are better candidates! ”

"Oh? Who is it? Wen Qingshan hurriedly asked.

"Naturally, it's a member of the Black Family!"

"The Hei family?" Wen Qingshan was slightly stunned.

Xie Yunfei nodded and said, "The Hei family is one of the seven great families, and their leader you have already met just now. ”

"There are still people with the surname Hei in this world!" I couldn't help but be a little surprised.

Wen Qingshan said: "It's not surprising that in ancient times, among the Turkic, Hui and Mongolian tribes, there were Hei clans, but most of them changed their surnames later, so it is very rare now, but if their ancestors were taken here many years ago, then their surnames will naturally be passed down." ”

"Third Brother Wen's analysis is correct, the Hei family here belongs to the Turkic people, and their ancestors are also the first group of demons to be captured here, it is said that their ancestors once participated in the construction of the Sky Wolf Castle, so if you talk about the familiarity with the Sky Wolf Castle, I'm afraid it must be the people of the Black family."

Hearing Xie Yunfei say this, Wen Qingshan immediately asked, "Could it be that the ancestor of the Hei family claimed to have discovered the secret passage to sneak into the castle from the underground dungeon?" ”

"That's right! Their ancestors also claimed to have encountered a demon dragon in the water prison! It's just that most people don't believe it, they all think that their ancestors are playing tricks, and I didn't believe it before, but now that I see such a real dragon, I think maybe there is really a dragon in the water prison. ”

Wen Qingshan turned his head to look at me: "It seems that we need to talk to the leader of the Hei family again." ”

He and I followed Xie Yunfei to the short leader again, and when he heard that we were going to sneak into the castle through the secret passage he had mentioned, he was extremely excited, and immediately called a man who looked very muscular.

No one knows how old this man is, because in this ghost place where you can never see the sun, you don't know the years at all, but judging from his figure, he should be in the prime of life.

The short leader introduced us and said, "This is Kurogi! It's my son, he is not only quite familiar with the terrain of the Sky Wolf Castle, but he is also the bravest warrior of our Black Clan, he once killed a wolf soldier with his bare hands, let him take you there. ”

I couldn't help but feel a little surprised when I heard that the strong man named Kuroki in front of me was actually the son of the short chief, because Kuroki was one meter eight or nine tall, and the short chief's height was only a little more than one meter six.

Kuroki was holding a long-handled giant axe that had been used by a human wolf beast, and a big bow on his back, which made people feel more and more surprised, you know, the giant axe was not an ordinary heavy, it weighed one or two hundred catties, and ordinary people couldn't lift it at all, even if it was a strong man with a little more strength, I am afraid it was only barely lifted, and it was estimated that it was rare to be able to dance it. And the black wood in front of him was holding a giant axe, but he was like no one else, which shows that his strength is not ordinarily great, and it is not impossible to say that he killed a human wolf beast with his bare hands.

With the guide, the team was established, with a total of seven members, me, Wen Qingshan, Old Ghost, Long Jiansheng, Li Guo, Xie Yunfei and Hei Mu, after some discussion, they decided to act immediately before the demon army arrived.

In order to allow our seven-member team to reach the mouth of the cave on the cliff of Yinhu Lake, the slaves organized a death squad of more than 100 people to cover us, and on the other hand, the slaves guarding the fortress were also on high alert to prevent the giant spiders entrenched on the roof of the cave from taking the opportunity to attack the fortress.

Under the leadership of Chen Biao and several special combat team members, we secretly opened the city gate, and everyone slipped out of the city gate, and before the demons could react, they suddenly launched a fierce attack on the demons guarding outside the city gate.