The reason why Zhao Hai's face was ugly was not because those bugs could launch powerful fireballs, but because he found that there seemed to be many types of bugs. Judging from the current situation, there were flying bugs and ground attack bugs. The Zerg are similar to chariots, and now there are arms similar to artillery. With so many arms, if they cooperate in fighting, it will be even more difficult to deal with them.

At this time, other people also discovered this, and everyone's faces were a little heavy. Now they all understand why Zhao Hai attaches so much importance to the Zerg. These Zerg have so many types of soldiers, and so many If the ordinary Zerg, who are not afraid of death, are really given the opportunity to come out of the underground space and directly attack the purgatory world, it will definitely be a disaster for the human race.

At this time, Li Xiao and the others also came to Zhao Hai's side. Li Xiao looked at the Zerg that kept firing fireballs and said in a deep voice: "There were some Zerg that appeared in our Immortal Martial World before. The Zerg that have appeared are not like this, but those Zerg can produce Tao-level masters in large quantities, which are very difficult to deal with. If the young master hadn't led us and gathered the power of the four realms, it would have been impossible to do so. Get rid of those Zerg quickly."

When the others heard what Li Xiao said, their expressions became even more solemn. Zhao Hai said solemnly: "This is why I am preparing to work step by step. If we advance with all our strength, we may achieve a big enough victory in a short time." The results of the battle, but we still know too little about this underground space. We don’t know how big the underground space is, nor do we know the true home of the Zerg, or in other words, where the real Zerg King is. We rush in quickly. , we may not be able to find the Zerg’s nest at all, but we will eventually be surrounded by the Zerg, and we will continue to compete with the Zerg for consumption. However, if we really compare consumption, we will not be able to compare with those Zerg, so We still have to be careful, step by step, push the Zerg into a blind corner, and finally completely eliminate them.

Everyone nodded, Zhao Hai looked at the Zerg, and then said: "Now the Zerg has appeared several types of soldiers, those that can fly, those that can rush on the ground, those that can shoot fireballs, as well as the Insect King and those Ordinary Zerg, these Zerg are very difficult to deal with, and those Zerg are also very smart. In the process of fighting us, they may slowly learn how to cooperate with various arms to fight. This is definitely not the case for us. What a good thing, and the Zerg can also launch attacks from underground and underground. We need to pay more attention to this. The Zerg above us are fine. As long as we don't come out of the shield, they will not pose any threat to us, but There are Zerg underground, but this is a huge headache. We must find a way to deal with the Zerg underground, at least we can’t let them become our trouble.”

Everyone nodded, and then Goode said: "Master, I just thought of something that might be useful." His words attracted everyone's attention, and everyone turned their attention to him, waiting for him In response, Goode glanced at everyone, and then said: "Master, although my research on magic circles is very good, my magic is actually to help plants grow. I have never given up on this over the years. So I also did some research on plants, and in our world of martial arts, there are always people engaged in research in this area. Just last year, when we were studying plants, we discovered a very interesting plant. The plant is called Dibaoguo. This plant does not grow very high, but its roots are very large and go deep into the ground. The most important thing is that the roots of this fruit have very strong roots. Once it finds something touching its roots, its roots will explode directly. The power is not small. We were very interested in this plant at the time. Later, I studied it and found that this plant now It has been planted for several generations, and the current effect of this plant is still good. Its roots can go deep into the ground about a foot, while the branches and leaves on the ground are only more than a foot high. Once something touches it, When it reaches his underground roots, his underground roots will explode immediately, and the power is pretty good, equivalent to the power of an explosive bomb."

The explosive bomb is a one-time magic weapon made by Zhao Hai using the eyeballs of the Zerg. The power is not bad. If the roots of this plant are really that powerful, then they can really be used. However, Zhao Hai Haidao thought of a question. He looked at Goode and said, "But if the roots of that plant explode, wouldn't the plant die too? It will also blow up the ground and injure us on the ground." People on top.”

Gude nodded and said: "That's true, but Master, if this plant is used well, then we really don't have to worry about underground problems, what do you think?" Gude also knows about this plant, and there are There are problems like this, but if this plant is really used properly, it will be impossible for the Zerg to attack them from underground.

Zhao Hai thought for a while, shook his head, and said in a deep voice: "It still doesn't work. Planting this kind of plant is still a bit too troublesome. I think we should use a magic circle better. We can use an induction magic circle. Add an attacking array, and this array can attack directly underground instead of attacking on the ground, so we don't have to worry about this problem. Let's go and study it now. Others, please do whatever they need to do. go."

Everyone responded, then turned and left. Zhao Hai directly led Goode and Linda to a spaceship. There was a laboratory on the spacecraft where they could conduct experiments. When others saw In this situation, I knew they couldn't help, so they all went about their own affairs.

After Zhao Hai and Gude entered the laboratory, they immediately began to study this new magic circle. Gude meant to make this magic circle look like a magic circle, and then after arriving at a place , just bury the magic circle underground. If an enemy approaches, then this kind of magic circle can be used directly.

However, Zhao Hai wanted to make him into a magic weapon. This magic weapon is more convenient to use and arrange than an ordinary magic circle. Moreover, this kind of magic circle also has four abilities. One, Sense, sense that there are a lot of abnormal movements underground, 2 warning, if an abnormality is discovered, the alarm will be started immediately, 3 attack, someone above will attack the magic circle, but this kind of attack, if it is a downward attack, it is best to be continuous, 4 It's defense. The so-called defense is actually very simple. It means to activate the land hardening technique when an abnormality is discovered to make the ground as hard as iron. In this way, even if the Zerg escapes the attack of the magic weapon, if you want It is not easy to get out of the ground directly. When they get out of the ground, the armored empire soldiers who have already been warned should be ready to deal with it.

After listening to Zhao Hai's words, both Good and Linda said that Zhao Hai had thought carefully, but if you really want to make such a magic weapon, it will be very troublesome and the production time may be long. Longer, this is also a problem, but this is also the problem that Zhao Hai and the others want to solve.

In fact, things used in the military sometimes do not require much. Especially for things that need to be used on a large scale, they often only need one feature, which is simplicity and strength. Simplicity is not only simple in structure, but also It is easy to produce, and strong means to be durable.

This was exactly the problem that Zhao Hai and the others wanted to solve. Zhao Hai and the others began to conduct experiments. Finally, after many experiments, they finally determined their design plan. Their design plan was very simple. This thing was to be made into a It looks like a long nail, but in fact this big nail is hollow. In the middle of this big nail, there is a pressurized cabin. This pressurized cabin can release energy for use by the magic circle above.

There are three magic circles on this big nail. The first is the sensing magic circle, which is used to sense abnormal activities underground. The second is the attacking magic circle. The attacking magic circle that Zhao Hai currently wants to use is the ground stabbing technique. It is a ground stabbing technique used underground. This ground stabbing technique stabs into the ground, and the range is larger. The third is the land hardening technique. This magic circle should be in the middle of the nail, and it can be directly used to close the ground. The position of the ground.

Zhao Hai's current plan for this big nail is about three feet long. This length can give people on the ground time to react, but this way, there is another problem with this big nail, that is, it is too long. , transportation and carrying are not very convenient, this problem also needs to be solved.

Finally, Zhao Hai thought of a way, which is to divide the big nail into three sections, so that each one is only about one foot, making it easier to transport. When using it, just install the big nail. , and the diameter of this big nail, Zhao Hai felt that twenty centimeters was not enough, and the attack area of ​​​​the ground stab technique, of course, the bigger the better.

But if this big nail can be driven into the ground in the shortest time, this will be a problem. Finally, Zhao Hai decided to install an earth-moving array on this big nail. , so that as long as he has the energy of this big nail, he can go underground by himself, and it will be more convenient to use.

After revising the design drawings several times, Zhao Hai called Wood over again and asked Wood what types of pressurized cabins there are in the steel industry now. He planned to follow the model of the pressurized cabins. After making some improvements to this big nail, Wood finally told Zhao Hai that in the steel industry, there are many models of pressurized cabins, and they also come in many shapes, including square, round, and some special models.

Zhao Hai nodded after hearing what Wood said. Then he took out the drawing of the big nail and showed it to Wood, asking him to estimate how long it would take for them to grow and how many such big nails they could produce every day. Nails, this is very important. Such large nails will be used in many places in the future. If the production cannot keep up, it will not work. In that case, it is easy to miss important things, so these are things that must be understood. If Wood and others If there are any difficulties in manufacturing, they can also improve the drawings based on the actual situation.

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