The superhuman vaccine, originally the pre-civilization Federation ZF, was extracted from the genetic tissue of the human body.

This vaccine expands a certain potential in the human body, which can improve the strength, speed, and defense of a person, but the side effect is that it may become less human-like in the future.

is like the big bald head of Yinping Mountain, Huang Chengjia.

On the outside, he still looks like a humanoid, but he is huge and muscular, and he is simply a wild giant.

Not only that, but his bones have also evolved, and the ulnar-long bone spurs peek out of his body, as well as at his elbows, like a human monster.

Including Zhang Yu, four segments of his spine have begun to mutate significantly, which is caused by a typical superhuman vaccine.

The other orc-based vaccine is more extensive.

The orc-based vaccine is a new vaccine that extracts powerful genes from various mammals and mixes them with human genes.

It allows the human body to evolve like a superhuman, but at the same time possess certain characteristics of beasts.

For example, mutants who have absorbed the lion vaccine may eventually develop a mane on the top of their head and neck, their tailbones gradually grow into the shape of a lion, and their fingers become sharp claws.

Mutants who have absorbed the crocodile vaccine may be amphibious and have the bite power that the crocodile dominates.

In general, the superhuman vaccine is based on the human body and evolves and mutates.

And the orc-based vaccine, while bringing power, will appear in the form of a beast.

The two can't talk about who is better or better, because the mutation is not very human-like in the end......

……

At this moment, inside the prison cell.

Zhang Yu thought about all this, he hesitated for a moment, but soon his eyes were full of determination.

Take out the Evolution Fruit stored in the warehouse and choose to use it directly!

"Using the Primary Evolution Fruit×1......"

A line of small print floated by.

The intense pain instantly filled Zhang Yu's limbs and bones!

It was like hundreds of millions of insects eating frantically inside the body, and there was no place on the body that was spared.

The momentary pain even made Zhang Yu feel like he wanted to die.

However, the pain was only instantaneous, and after a few breaths or so, the pain gradually disappeared, and with it, endless comfort.

It's like taking a hot bath in your body, and you can't help but want to fall asleep.

When he opened his eyes, Zhang Yu found that a layer of black things had floated on the surface of his body, which should be the traces left by the removal of impurities by the body while mutating.

Open the system interface:

【Attributes】

Grade: 4th grade 1st section.

Variation: 41%

Increase: 20%

Qi and blood: 2501/2501 calories

Merit: 310

Prestige: 14071

The qi and blood value has been directly increased from 1911 cards just now to 2501 cards!

Nearly 600 calories of qi and blood!

You must know that with the increase of the mutation level, each card of qi and blood becomes richer than before, and the strength and speed of the representative attributes are also stronger.

The 600 calories of qi and blood don't seem to be as much as a third-grade, but Zhang Yu feels that if he is facing the state of the third-grade just now, at least one enemy and two! And it's the kind of winning well.

Looking at the system interface again, there is an additional 20% amplification attribute.

Directly urge qi and blood!

In the seventh prison room, the power of qi and blood suddenly woke up Zhou Ping and the others not far away.

They were taking a nap, and suddenly felt a palpitating force coming from not far away, it was an indescribable feeling, a bit like a state of hypoxia, they could clearly feel a pair of invisible hands choking their throats, and the sound of their hearts pounding could be heard clearly!

A few people woke up almost instantly!

Subsequently, everyone's eyes quickly focused on Zhang Yu's body.

"What's that?"

Someone exclaimed.

On Zhang Yu's body, there is a faint phantom!

The appearance of that layer of phantom is very similar to Zhang Yu, but it is very hideous.

A pair of hands as rough as iron tongs, the muscles on the body are not like words, and there are ruler-long bone spurs piercing the skin at the elbows and on the back, protruding from the outside of the body!

This form ...... How similar is it to the big bald heads on Yinping Mountain in the past?

It's just that Zhang Yu is a phantom, and the big bald head is an entity.

Ignored Zhou Ping and the others.

Zhang Yu was silently experiencing the changes in his body.

Originally, his qi and blood value was 2501 cards, but at this moment, after turning on the phantom state, his qi and blood value directly increased to 3001 cards!

With a full 500 calorie boost, this is the power of Mutant Souls!

Once the mutant evolves to the middle grade, if the body's qi and blood value is stimulated to the limit, he will get an increase called the mutant soul, which Zhang Yu saw on the mutation guide.

Otherwise, why would the middle three products be so much stronger than the lower three products?

Do you really think that adding some qi and blood is all your strength?

Yes, after the increase of qi and blood, the fourth grade is much stronger than the third grade, but the span is really not that big!

What really opens up the span is the amplification of the mutant soul.

The current Zhang Yu is only a section of the fourth grade.

What if it's the five grades?

Will the increase be even greater?

In this way, it can be said that every time you upgrade a product, your strength will get a huge increase.

After a little experience, Zhang Yu turned off the power of the amplification.

The mutated soul suddenly withdrew into its body.

And Zhang Yu's appearance has also returned to the same as before, except for the protruding four bone spurs in his spine, when he stimulates qi and blood, he looks no different from a normal person.

"The state of opening the mutant soul seems to be very consuming of qi and blood!"

After Zhang Yu turned off the Mutant Soul, his body felt a little tired.

Open the system interface:

【Attributes】

Grade: 4th grade 1st section.

Variation: 41%

Blood: 2001/2501 calories (+)

Merit: 310

Prestige: 14071

In just a moment, 500 calories of qi and blood have been consumed.

"It seems that the Mutant Soul is not as superb as imagined, and can only be used as an explosive skill."

Zhang Yu thought secretly, and at the same time his attention was on the parentheses behind the qi and blood values.

In that parentheses, there is a small "+".

Zhang Yu remembered that this was not there when he was just full of qi and blood, and it should have appeared after opening the mutated soul and the qi and blood became less.

"What do you mean?"

Zhang Yu tried to click.

"Fame -1......"

While deducting reputation points, the Qi and blood consumed are also restored by 1 card.

Zhang Yu was stunned for a moment, can this thing replenish the lost qi and blood value?

Immediately afterward, he clicked a few more times.

"-5...... Reputation"

The consumed Qi and Blood recovered 5 calories.

Finally, Zhang Yu directly pressed and held the plus sign.

"Fame -494......"

"Damn!" Zhang Yu suddenly screamed.

The qi and blood value he consumed was instantly replenished!