"Skip it selectively." Zhang Chen suddenly thought that since he was only honing his control over the aura and did not substantially improve his combat effectiveness, it could only become a way to cultivate the aura in ordinary times, and it could be skipped directly.

Zhang Chen continued to flip through the exercise books to check the follow-up content.

The fourth decision, the spirit decision.

"Sword Gang, Imperial Qi, Condensing Qi, Imperial Spirit ......"

"The difference between the Imperial Spirit and the Imperial Qi is that the Imperial Spirit has spiritual sense, while the Imperial Qi is just pure aura."

"The spirit is based on the change of form, the spiritual consciousness is divided into a part and integrated into the aura, so that the aura can gain short-term wisdom, so as to form an independent individual, and break away from the battle. And if it's just aura, you can't fight out of the body. The more complex the form changes of the aura, the stronger the combat power of the spirit. ”

Zhang Chen was a little dumbfounded, because the fourth decision was actually based on the third decision to cultivate.

There must be a condensation of the third decision, and the aura can be condensed into a complex form, and the spirit of the fourth decision can be brought into effect.

For example, if it's just Jian Gang, even if the spiritual sense is given to Jian Gang, but with the simplicity of Jian Gang's structure, it can only be used as cannon fodder for a one-time attack, so Jian Gang and the Imperial Spirit don't have much meaning.

The significance of the spirit is that it condenses a conscious aura and fights outside the world, so the complexity of the form is very important.

Zhang Chen had a headache.

"Cultivating the third decision is very painstaking, and now I can't practice it in a day or two, maybe it really needs to be calculated in years."

Zhang Chen put away the exercise books, sighed, and fell asleep.

The morning is sunny.

Zhang Chen briefly moved his body, preparing to go outside for a run, and by the way, to check if there was any danger around him, these were all routine homework.

Can be sudden.

The sky above him seemed to be like some colossal thing, and a haze that enveloped the entire town suddenly appeared.

When I looked up, the sky was all black, and a disc-shaped object that could almost envelop half of the sky appeared out of thin air.

Then, the massive disc-shaped object suddenly disappeared again.

The light slanted down again, enveloping the ground and Zhang Chen's body.

The expression on Zhang Chen's face was demonic, just now he briefly entered a state of fear, thinking that the sky had fallen.

It is said that the sky is falling, and a tall man is on top, but Zhang Chen is a tall man, with a height of one meter eight.

However, after the huge disc suddenly disappeared again, Zhang Chen seemed to have guessed what that thing was?

UFO!

Before the end of the world, there was frequent news about aliens visiting the earth, and there were many secrets in this world. After the apocalypse, someone even shot down the alien spaceship with a slingshot at home, which directly became a hot search.

Let's not talk about whether this news is true or not, it shouldn't be fake if it's on the news, let's just say that Zhang Chen must believe in the existence of aliens. After all, the aura has been revived, and it is a little strange that there are no aliens.

And just now, the behemoth that appeared in the sky and blocked a large area of light was not a UFO!

Just when Zhang Chen was stunned that he had encountered UFO, an object fell from the sky, a square.

Zhang Chen caught it with his hand and found that it was indeed a block, and this thing seemed to have fallen from the UFO.

"What aliens have left behind for humanity? There won't be any information left behind by aliens in it, right? ”

Zhang Chen tried to turn the Rubik's Cube, and he found that every time he rotated, the arrangement of the squares on the Rubik's Cube would automatically change their positions.

"I've played with the Rubik's Cube, and it's very slippery, just apply the formula, and I can turn it out with my eyes closed. However, this Rubik's Cube will change color dynamically, and every time it rotates, the distribution of its color blocks will change, and if you solve this Rubik's Cube in the usual way, it will never be solved. ”

Zhang Chen found that this is a higher-dimensional Rubik's Cube, to be precise, the solution space of this Rubik's Cube is more high-dimensional, beyond the difficulty of ordinary Rubik's Cube, so to solve, it is necessary to apply more complex formulas.

"The aliens threw this thing at me, there must be something in it that needs to be conveyed. It's possible that humans were randomly selected to distribute Rubik's cubes, but did they pick me because I have some special qualities? ”

When Zhang Chen was thinking about how to unlock this Rubik's Cube.

"You've successfully unlocked the [Sci-Fi Module]!"

Sci-Fi Module ...... Unlocked ......!

Zhang Chen was a little surprised.

It seems that this Rubik's Cube belongs to science fiction products.

It's not going to spin around and shoot shells, right?

Zhang Chen was worried, so he put the Rubik's Cube into the printer storage space and stopped touching it for the time being.

"The sci-fi module is actually activated, so let's take a look at the drawings related to the nuclear energy device."

Zhang Chen opened the sci-fi module and looked at the drawings inside.

Through his search, he found a nuclear energy device, a portable nuclear energy device with the shape of an arm guard, which can be mounted on the arm.

It has a variety of conversion interfaces, which can switch functions, whether it is a charging interface, a musket interface, a weapon interface...... Everything.

"I didn't expect that the nuclear energy device that Boss Cao wanted was already available in the sci-fi module. This also saves you the hassle of retrofitting. ”

Zhang Chen checked the raw materials of nuclear energy materials.

Various metals are needed, including metals such as gold, and in addition to this, radioactive elements are required.

Radioactive elements are carefully guarded before the end of the world, and individuals can hardly get their hands on them, although some channels, such as the black market, can still be bought. And after the apocalypse, it is much easier to obtain radioactive elements.

Zhang Chen called Cao Bing.

"Boss Cao, about the nuclear energy device, I already have an eyebrow and can print it out, but I need some raw materials, and I need you to prepare."

"Zhang Chen, are you sure you can develop it? It's not just an inspiration, but you can develop it? Cao Bing was a little stunned and asked.

"That's right, Boss Cao, as long as you prepare enough radioactive elements, I will prepare the other materials, and if you want to mass-produce nuclear energy devices, it is not a problem."

After the call with Cao Bing ended, Zhang Chen considered that he had discovered gold mines before, so gold leaves were not a problem, not to mention other metal materials, which could be easily purchased online.

After ending the call with Zhang Chen, Cao Bing looked surprised, "Zhang Chen said that he could develop it, it shouldn't be a big deal, because I know his personality, if he is not 100% sure, it is impossible for him to boast of Haikou." ”

Cao Bing's heart was full of anticipation, and he asked people to go to the black market to purchase a large amount of radioactive elements.

"With the sci-fi module, the base's defenses can also be upgraded, and it must be prevented. Blood corpses and Jindan monks may become a threat to me, and it is impossible for me to protect everyone alone, so I must have a stronger defense. ”

Zhang Chen flipped through the sci-fi formula, trying to find more powerful technology.

He discovered a defense tower called the Death Light Destruction Tower, which could shoot death light more powerful than the laser destruction.

Zhang Chen screened it, and he finally confirmed that the Dead Light Destruction Tower was the only device that could be printed at present.

For the rest of the sci-fi defenses, the raw materials are too high-energy.