July 15, 6 a.m.

Originally, the morning sun had already sprinkled the sky at this time, but today, the sky was still gray, and only a small bright spot could be seen, which was faintly lit.

After Gu Bai got up, he looked at the sky outside through the gap in the curtains, and sighed, this scene was really familiar to him, he knew very well that in the next six hours, the sky would become darker and darker, until 12 noon, the sky would completely turn black.

After six hours of darkness, everything will be changed.

Gu Bai glanced at the system.

Experience: 45

Pneumatic (the gene lock is not opened and not displayed)

Psychic (Gene lock has not yet started not showing)

Disaster gas concentration: 1% (100% can open the first gene lock)

The panel didn't change much, only the line showing the concentration of the disaster gas changed from 0 to 1.

Gu Bai knew very well that this meant that the catastrophe had really begun.

According to the research of later scholars, the reason why superhumans appear is because the genes in these people's bodies have a strong adaptability and storage to the calamity, and when the concentration of calamity reaches a critical point in the body of such people, the gene sequence will be changed, which is the so-called opening of the gene lock.

Those creatures that have become disaster beasts are because the genes in their bodies cannot withstand the power of the calamity, so that terrifying mutation occurs.

As for those ordinary people who are between disaster beasts and superhumans, it is because there is a lack of a part of the gene fragments in the body that can allow the disaster qi to store and evolve, so although the disaster qi can enter the body of these people in a short time, it cannot affect and change in the body of this kind of person for a long time, so if the concentration of the disaster qi does not reach the critical point, there will be no abnormal changes.

Gu Bai belongs to the third type of ordinary people, in the last life, Gu Bai had no way to change, but in this life, he will not let this kind of thing happen again.

Even if he wants to take risks, on the line of life and death, Gu Bai will not be afraid at all.

Seeing that the concentration of the calamity qi on his face was changing little by little, Gu Bai's eyes were bright, and he involuntarily clenched the short sword in his palm and began his daily practice.

In the period of time before the genetic lock was really opened, Gu Bai could only rely on the sword in his hand if he wanted to live.

And if he wants to forcibly open the genetic lock, Gu Bai also needs to hunt a calamity beast, he knows very well how difficult it is for an ordinary person to deal with a calamity beast, the painful struggle in the previous life makes him know how much effort he has to put in in this life.

Gu Bai practiced the most widely spread basic swordsmanship in later generations, there were no tricks, only the most basic seven moves, stab, grid, pick, split, point, cut, and intercept.

Gu Bai's later life was just an ordinary person, and he was not qualified to come into contact with that kind of advanced combat technique at all, so the basic swordsmanship was the one that Gu Bai was most familiar with and had practiced for the longest time.

In the previous life, Gu Bai practiced for twenty years, and it was precisely by relying on basic swordsmanship that he was able to survive in the wilderness for so many years, at that time, although he felt that he was inferior to those so-called superhumans, he also had his own pride, that is, on the foundation, no one could be more solid than him.

There was no in the previous life, and there is no in this life.

Because at the very least, no one is so stupid to be able to practice a foundation for twenty years.

After being reborn, holding the sword again, Gu Bai could still feel that sense of familiarity, this kind of basic thing, he only needed to practice diligently to find the original feeling, the only difference was that the strength of this body could not keep up now.

Gu Bai has only practiced one action "stab" in the past few days.

This is targeted, because the weakness of most plague beasts is the heart, so to hunt the plague beast, he must ensure that the strength of his whole body can pierce the heart of the plague beast.

With Gu Bai's current physical strength, even if he practiced like this every day, he would only have one or two chances, and under one stab, he would either die of the calamity beast or die by himself.

Gu Bai stabbed one by one, a hundred, a thousand, ten thousand times, even if his body had collapsed, he still gritted his teeth and persisted, as long as he didn't collapse and fell unconscious, he would keep practicing, and when he woke up, he would eat some rations and continue, and so on.

Two months after the cataclysm.

In the dim dormitory, Gu Bai suddenly took out his sword, and a mosquito the size of a quail egg was directly stared at the wall by him, and he didn't make a sound.

Gu Bai slowly withdrew his short sword, all the movements were so natural, combined with the foundation of the previous life and twenty years, Gu Bai practiced the "thorn" to a consummation realm in just two months.

"Whew!"

Exhaling deeply, Gu Bai tightened the down jacket on his body, put away his sword and sat down.

Over the course of more than two months, the catastrophic situation has become more and more serious.

A month ago, Gu Bai could still hear sporadically on the radio about the government's deployment of evacuation and food distribution points, but now there is no news at all.

And now that the temperature is getting lower and lower, even if you wear several layers of clothes, you can still feel the biting cold air drilling into your body.

Not only that, but insects such as mosquito beetles have also undergone mutations, such as the kind of mosquitoes just now, Gu Bai has already killed dozens of them, which means that the second stage of the catastrophe has completely begun.

And the concentration of calamity qi in Gu Bai's body had reached 80% a few days ago, and there had been no change in the slightest.

In the corridor outside the dormitory, there were also a few beast-like howls from time to time, this sound Gu Bai knew very well that this was the sound made by humans after they turned into ghouls.

And this kind of thing is Gu Bai's goal.

The ghoul belongs to the first-level disaster beast, and it is also the disaster beast that Gu Bai is most familiar with in his previous life, the weakness of this disaster beast is in the heart, and he is most sure of hunting.

I worked hard for more than two months, just for today.

Gu Bai wrapped the short sword and palm together with a strip of cloth, slowly tore the tape that sealed the door, and used the sword to pick open a crack in the door, the corridor was pitch black, and a strong bloody breath came to his face, making Gu Bai frown, at this time, it is estimated that there are no living people in the entire dormitory building.

Gu Bai tiptoed out against the door, a ghoul he could barely deal with now, if there were too many, he could only wait for death.

Therefore, Gu Bai was very careful in every step, because he knew very well that if he took a wrong step now, he would suffer a catastrophe.

The door of the dormitory in the corridor was wide open, and the blood that had already turned black was sprinkled on the ground and the wall, and when he walked to the adjacent dormitory, Gu Bai also saw a corpse lying on the ground with a frightened face, his stomach and head were all empty, all kinds of organs were scattered all over the ground, and flies the size of a fist fell on it, and the maggots with long fingers were drilling inside, looking very disgusting.

This situation is not limited to this dormitory, the current dormitory building is simply purgatory on earth.

Gu Bai walked cautiously, and just as he was about to reach the entrance of the corridor, a gray shadow happened to come up from the corner of the corridor, Gu Bai frowned, and hid in a dormitory, through the reflection of the small window on the dormitory door, Gu Bai saw the appearance of this thing.