I have a city in another world

The defensive weapons refined by Tang Zhen are installed inside the sewer and have an automatic lifting system.

When necessary, it can be lifted from the sewer to the ground to perform a locked attack on the enemy.

The power of the weapon is also the spirit stone, which relies on the rune array to activate the drive.

Spiritual stone is a kind of pure energy with different properties. If it can be used freely, it can obtain some unexpected effects.

Tang Zhen is beyond the master level in terms of refining weapons and using spiritual stones, and has too many creative ideas to display.

The difficulty of refining this type of defensive magic weapon can only be considered average, and it takes about a hundred hours to complete.

With the help of members in the gathering place, Tang Zhen installed the parts and installed spirit stones in key parts.

Simply test it to make sure it's working properly.

There were no flying monsters around, otherwise Tang Zhen would definitely test it to see how powerful this weapon was.

It doesn't matter if the experiment fails. It won't be long before this attack weapon will be put into actual combat.

He also arranged for some people to obtain metal solution in the spirit stone furnace to make special projectiles for weapons.

With the existence of ready-made molds, refining the projectiles was not difficult, and Tang Zhen's assistance was not needed at all.

Projectiles are consumables and must be stored in large quantities. When the war begins, the consumption of ammunition will inevitably be extremely high.

But it wasn’t long before the metal reserves were depleted.

The lost people were helpless and could only hand over the problem to Tang Zhen, hoping that he could give a solution to the problem.

The scarcity of metal materials is a problem faced by every gathering place, and Tang Zhen is encountering the same thing now.

Tang Zhen once studied this issue and invented a method.

Make a spirit stone powder, then mix it with water and stone powder to get a clay-like substance.

This clay-like substance is put into a mold for compression, and then placed in an outdoor area to freeze and form.

Due to the incorporation of spiritual stone powder, the clay is as hard as steel in cold environments, and some properties are even stronger than metal.

If used as a projectile to attack flesh and blood, it can achieve considerable lethality.

This manufacturing method can be regarded as using local materials, which can effectively alleviate the huge gap in materials.

The biggest disadvantage of this material is that it cannot be placed in a high-temperature environment, otherwise it will turn into a puddle of mud.

In the Lost City, there is no need to worry about the weather. The snow here never melts.

According to the formula provided by Tang Zhen, the members of the gathering place started making projectiles and stored them directly in the outdoor environment.

The colder the weather outside, the harder the projectiles will be frozen and the better the killing effect will be.

Looking at the shaped sharp projectiles, many people can't wait to see how effective it will be in killing monsters.

Compared with other gathering places, which were lifeless and passive during the polar night, Tang Zhen's gathering place was obviously overly active.

Some lost people worry that such an approach will attract monsters and bring disaster to the gathering place.

Tang Zhen told everyone that there was no need to worry, the rune array could effectively solve this problem.

Even if I yelled, no sound could be heard outside.

With Tang Zhen's promise, everyone finally let go of their worries and could free their hands and feet to work.

This underground gathering place is like an ant nest, and the lost ones are the hard-working ants.

Under their work, the underground space continued to expand, and functional areas appeared one after another.

Factories for growing vegetables, insect nests for cultivating insects, and mushroom houses for cultivating mushrooms were built one after another.

Having these functional areas means that it won’t take long for the food in the gathering place to be improved.

Tang Zhen took action at this time and helped design some rune arrays, which could effectively increase production and income.

In the cave where mushrooms are cultivated, the most suitable temperature and humidity can be maintained through the control of the rune array, which can accelerate growth.

The insect nest and vegetable planting area also have similar rune circles. After entering, you can clearly feel the difference in the environment.

Technology changes life, and Tang Zhen's spiritual stone application technology has given many lost people insights.

Many people admire him and hope to learn from Tang Zhen and master this magical spiritual stone application technology.Tang Zhen poured cold water on it, saying that if you want to learn this technology, the threshold is actually quite high.

At the very least, you have to become a spiritual practitioner and be able to absorb the energy in the spiritual stones before you have a chance to get started.

After knowing the specific requirements, many people were very disappointed and had to give up the idea.

Fortunately, at this time, Tang Zhen pointed out another way for everyone to try to practice martial arts.

With the use of special magic weapons, powerful combat effectiveness can be obtained, and even ordinary lost people can defeat powerful enemies.

For the lost ones who long to become stronger, this is an extremely precious opportunity that they will not give up easily.

They follow the schedule, participate in work training on time, and take breaks at designated times.

Although it is the polar night outside and it is always dark, the gathering place must have a strict schedule.

So as not to get lost in a trance, fall into a state of madness, or give the devil an opportunity.

In order to avoid boredom, Tang Zhen specially arranged entertainment activities, which you can freely participate in during breaks.

Make some interesting tools and teach some interesting ways to play, so that the members in the gathering place will have fun.

Keep your body and mind healthy and don’t give the devil an opportunity to take advantage of you.

It was indeed boring during the polar night, but it did not have much impact on Tang Zhen. Taking advantage of the "hibernation" time, he had many things to do.

For example, take this opportunity to refine a vehicle to help him drive quickly in the city.

With convenient transportation, movement will be easier and you will have the opportunity to reach further places.

The survivors of the Lost City actually also use some vehicles, but most of them use human towing.

The vehicle designed by Tang Zhen uses spirit stones as a driver, which can ensure a long battery life and have sufficient power.

Compared with human-powered vehicles, Lingshi vehicles have many advantages and are truly high-end means of transportation.

I believe that the emergence of this kind of vehicle will definitely change the structure of the Lost City and give Tang Zhen a greater say.

With enough strength, you can take the next step.

To complete this plan, more materials and spiritual stones are needed, which Tang Zhen does not have in his hands now.

But it doesn't matter, Tang Zhen has already made preparations and is now waiting for the opportunity to come.

All is ready except for the opportunity.

Tang Zhen couldn't be sure when exactly the storm would start. He only knew that it wouldn't take long.

After some time, Tang Zhen called Old Cat over and handed him a tool for digging soil.

Just by inserting it into the soil, a gap will appear, just like a burning iron bar touching the snow, it will melt in an instant.

The cleaned soil will enter the machine through the pipe and become a spherical soil bomb after compression.

The soil bombs will be sent to the surface, and maybe at some point, they will be turned into weapons to attack the enemy.

Since the arrival of the polar night, Tang Zhen has been actively preparing for war, and everyone can see this.

Tang Zhen never told him exactly how to fight, let alone conducted combat training.

The members at the gathering place were confused, but did not have the courage to ask. They believed that Tang Zhen had his own arrangements.

"It won't take long before there will be a fierce battle. You need to be prepared in advance."

Hearing what Tang Zhen said, Lao Mao didn't feel nervous, but felt relieved.

Everyone in the gathering area knew that a war was going to happen, but they still didn't know the specific situation.

This feeling is so uncomfortable that people can never calm down.

Now that I got a clear notice and knew the specific situation, my hanging heart immediately dropped.

At the same time, there was a sense of pride that suddenly rose in his heart, wanting to perform well in the battle.

The leader is so powerful, how can his subordinates perform so poorly? They must make the enemy tremble with fear!