However, tonight, the door to the library, which had not been opened for an unknown amount of time, was finally opened.

The gladiators who passed by were a little surprised, but they all left quickly, thinking that the librarian in charge of cleaning had come here to clean up or something, and no one cared at all.

As a result, this quiet environment now belongs to Zhang Yu alone.

The library is huge, and the shelves are filled with all kinds of books, all of which are available.

Zhang Yu glanced at it and felt a headache.

With so many books, it's so difficult to find the information you need!

The shelves are not categorized in detail, and the devil knows where to put the information about the mutations.

What about librarians? You come out, I want to talk to you!

Zhang Yu took a few deep breaths, calmed down his mood, and began to sift through the materials he needed from the first bookshelf.

"World Philosophy, Political Economy, and Transportation ......"

After reading a few copies, Zhang Yu couldn't help but feel a little helpless.

Who is this special book?

Who sees these things here!

Who understands it!

Also, who put this book "Postpartum Care of Sows" here? Do gladiators need something like this? Admin, you're out! Lao Tzu will never kill you!

Zhang Yu rubbed his head and poked his head in search.

Finally, a unique book came into view.

"Spring Palace Thirty-Six Style?"

Zhang Yu looked a little dazed, "What kind of book is this?" Peerless martial arts? ”

With a strong curiosity, Zhang Yu slowly opened the book, and some wonderful words suddenly came into view.

"Diao Chan worships the moon? What kind of move is this? ”

"What is a peach blossom with a human face?"

"Fish flying shallow bottom? Ooh! What a domineering martial arts! ”

Zhang Yu didn't pay attention to it a little, but he fell in love with it for a while.

It took a full hour to come back to my senses.

"Ahh No, I'm here to find mutation materials, how can I indulge in such rubbish books? ”

Zhang Yu's expression was serious, like a saint, introspecting about his behavior just now.

"Demon Book!"

In the end, he slammed the Spring Palace Thirty-Six Style to the ground to express his anger.

Zhang Yu then searched down, and after two hours, he finally found a resource book called "Mutation Illustrated Book".

He was shocked and hurriedly called to open it.

"In the year 2090 of the Gregorian calendar, the federal ZF openly used a large number of biological and chemical weapons on the grounds of improving strength and strengthening physical fitness, and the evolution of the whole people broke out. In this year, the order collapsed, the end came, the world forces began a new reshuffle, and the tower officially opened the Divine Calendar, which is: the first year of the Divine Calendar! ”

The opening introduction of "Mutant Illustrated Book" is a concise and shocking background introduction.

"It turned out that it was because of the use of biological and chemical weapons by the federal ZF at that time that it caused the mutation of the whole people, and the ...... broke out in the apocalypse"

Zhang Yu pondered carefully.

Perhaps, the East Great Wilderness was once a biochemical test site!

He remembered that there were a large number of "dead places" of different scales in the Eastern Great Wilderness, and those dead places had terrifying virus powers, which were still extremely strong, and even mutants could not live there for a long time.

And those dead places, if they were the test sites of the virus back then, then everything would have been explained.

Imagine, with Yinping Mountain as the boundary, the east side has become a virus infection area, while the west side is peaceful. That's because the big forces headed by the "Heavenly Tower" have established a new state and a new order.

And now the highest authority of the Great Xia Kingdom is called the Heavenly Tower!

"That's ...... so"

Zhang Yu seems to have figured out the ins and outs.

Subsequently, Zhang Yu was directly intoxicated and wanted to take a closer look at this illustrated book.

Two o'clock in the morning.

It had been five hours since Zhang Yu opened the Mutation Atlas.

And only now did Zhang Yu put down the illustrated book, stood up and stretched.

After five hours of study, Zhang Yu finally understood a little bit about mutation.

It turns out that the mutant virus is the evolutionary vaccine mentioned by the ZF of the Federation of the former civilization era, and the place where the vaccine is delivered is the vast Eastern Wilderness today.

Unfortunately, vaccines have always been flawed, and in the end they cannot be called vaccines, perhaps it is more appropriate to call them mutants.

The power of mutant viruses is powerful.

An ordinary person who has taken the virus, when he becomes an adult, only needs to let the virus grow in the body for a year, which is enough to transform from a helpless person into a warrior with infinite strength.

And with the difference in constitution and the passage of time, the virus will mutate stronger and stronger, resulting in the host becoming stronger and stronger!

In the end, you can even have the power to tear everything apart!

However, there are good and bad things in everything.

The mutation not only has terrifying power, but also has huge side effects.

That is to exacerbate the loss of vitality!

It is difficult for a person infected with the mutant virus, whether male or female, strong or weak, to live past the age of 50.

Once the human body begins to age and the body goes downhill, then the virogenic in the body is no longer his powerful weapon, but a sharp blade for suicide.

In the 202 years of the divine calendar, there is no mutant who can survive past the age of 50!

Zhang Yu clearly remembers that this is how his parents died.

Nearly fifty years old, aging very quickly, in a few days can go from a person who looks young and strong on the outside to a skinny appearance.

There is no cure for this virus! I could only watch them die.

That feeling of powerlessness is really difficult for ordinary people to understand!

……

This night, Zhang Yu learned a lot of things from the mutation guide, and there were also many things that he didn't have time to digest.

But time is running out, it's already two o'clock in the morning, and it's time to go back and rest.

You know, at night, there is still a battle of life and death waiting for you!

Back in the cell, sleeping, all night without words.

The next day, when Zhang Yu woke up, it was already noon.

He went to the dining room to grab a bite to eat, and after giving Zoon another one, he returned to the prison cell and began to level up.

【Attributes】

Grade: The pinnacle of the third grade.

Variation: 39.9%

Qi and blood: 1911/1911 card

Merit: 310

Prestige: 14071

At the pinnacle of the third grade, only half a step away from breaking through the lower three grades and advancing to the realm of the middle three grades.

It seems like a half-step difference, but it is a thousand miles away.

The variation is divided into nine products, and it is widely divided into the lower three products, the middle three products, and the upper three products.

Between these three major levels, every promotion is a qualitative leap!

The mutants of the lower three grades may be much stronger than ordinary people's qi and blood, but after all, it is only an enhancement of qi and blood, and the abilities brought by mutation have not been realized in their bodies at all.

At the middle three grades, the mutant can cast the Mutant Soul, which is another name for it, called the Evolutionary Soul.

Zhang Yu is not very clear about the specific role, and only saw a rough idea in the mutation guide.

When the former Civilization Federation ZF released the virus, it roughly divided the virus into two categories.

One is the superhuman vaccine!

The other is the orc-based vaccine!