I looked at the berserker, the saber in my hand was already unbearable, and I stabbed straight ahead.

A knife pierced the Berserker's head, and the Berserker next to him came again, and I kicked it away, and the saber in my hand swept through, slashing its head off.

The Berserkers couldn't stop me, and under my frenzied slaughter, all the Berserkers were cut down here.

I don't know if it's my delusion, but after the battle just now, I feel that the strength in my body has been further improved, especially the reaction speed in all aspects.

Maybe it's just growth, I don't know why, but I love it.

Before I came to the fortress, it was very quiet and no one was present, so I couldn't help but walk in. In the whole fortress, there was nothing, nothing empty.

My brow furrowed slightly, there couldn't be nothing here, there must be something I hadn't noticed.

Since there are no buildings here, the most likely entrance is underground!

As soon as I thought of the last time I saved someone, I immediately looked at my feet, looking for a possible entrance, and I was really able to find it. Not far ahead, there was something strange-looking, and I couldn't help but reach out and touch it.

There was a big iron plate on the ground, and I lifted it directly. This iron plate is quite heavy, ordinary people can't move it at all, at least three or four people can do it.

I forcibly removed the iron plate, and sure enough, there was a passage underneath, and I climbed down the stairs.

It's dark down here, so I turned on my flashlight and shone it, and it's pretty deep down there. Fortunately, it was spacious enough, not a simple wellhead, and I soon came to the bottom.

When I got to the bottom, it was all lit up, and it looked like a sensor. When it lit up, I walked down the passage to see what was inside.

The passage was long, and I walked for a long time to get to a room that was supposed to be the real entrance. Because there are surveillance displays everywhere, it's just a pity that these displays are broken and don't show anything.

There is an elevator next to it, and there is electricity on it, which means that it can be operated. But I didn't rush down, but went to the side and got a weapon, and next to this is the arsenal.

I don't know what happened, the person who was supposed to stay here is missing at this moment.

I grabbed an automatic rifle, some ammo and grenades, and walked into the elevator. There is only one button in the whole elevator, and that is the button that displays R, so I press the R button.

The elevator started smoothly and moved downward, and I raised my automatic rifle in my hand, ready to fight.

"Ding Dong!"

The elevator reached the R floor smoothly, the elevator door slowly opened, and I immediately squatted down, but fortunately there were no guards outside. I was a little surprised that it was empty and there was no one outside.

Why?

Why is there no one here?

I stepped out of the elevator, it was a laboratory, but the floor was covered in blood, and there should have been a fight. It's hell here, the further you go inside, the more blood there is, and there are bullet casings everywhere.

Walking all the way through these labs, I was ready to go to the innermost part to see, and the really most important thing was in the innermost part.

That's just my thoughts, generally speaking, the innermost room tends to be the most important room.

When I came to the innermost, there was a closed gate here, and there were zombies lying outside the gate, all of whom had been killed by bullets. There were many berserkers and hunters, as well as a few lickers, and the whole scene was very tragic.

There were not only zombies, but also many soldiers in black combat uniforms, and the ground here had been dyed red, and the blood on the ground had dried up, as if someone had splashed paint.

Most of the soldiers were torn to shreds, and many were smashed into pulp, and the place was filled with the smell of blood and foul odor.

When I got to the gate, the whole gate was locked, and the outside couldn't be opened at all. After several attempts, the door was so sturdy that it would take a fair amount to blow it open.

There's no way to get in from here, so I set my sights on the exhaust fan, which should be able to get inside.

Generally speaking, underground works like this must take into account the problem of air circulation. Therefore, in every room, there must be something for ventilation, that is, the existence of an exhaust fan.

Exhaust fans are generally large enough to accommodate normal people, so I looked around outside and quickly found the exhaust fan I wanted.

I took the exhaust fan apart and jumped up and jumped on it, it was quiet and there was no smell of blood.

I climbed along the exhaust fan, and soon found the innermost room, and looked down through the exhaust fan, which was also very miserable.

There were seven or eight corpses down there, and they were already dead underneath, and there were no zombies around. I took the exhaust fan apart, jumped off it, and examined the bodies.

Three of these corpses were wearing white coats, and the rest were black combat uniforms, which were supposed to be fighters of the Black Dragon Society.

They all had a bullet hole in their heads, which should have been shot, but I don't know if it was an internal contradiction, or if it was agreed to shoot each other, and there were no traces of a fight around.

Suddenly, my eyes lit up, and there was an experiment notebook next to them, which was supposed to be a recorded virus experiment.

I walked over and picked up the experiment notebook, and from the first page, it was just as I thought, this was their experiment record, which detailed the process and results of the experiment.

It turned out that this was a key experimental site, and the entire underground laboratory cultivated a hundred test subjects, and they combined the zombie virus with my blood to develop a new type of R virus.

The R virus has a very high mutation ability, and all people who are injected with the R virus will be strengthened in a very short time and will not transform into ordinary zombies.

On the basis of the R virus, these guys developed the X virus, which is an antibody to the R virus. Although it is an antibody, the X virus is also contagious, and once injected with the X virus, all cells throughout the body will be infected and assimilate.

This X virus injector, because the cells are infected and assimilated, can have a strong recovery ability. That's what I've met with recoverers, and that's why they're extremely resilient, and I kind of understand when I see this.

The R-Virus can directly mutate people into berserkers and hunters, as well as lickers and summoners, while the X-virus can make them evolve further and have strong recovery abilities, becoming Level 4 restorers.

So what kind of effect will the combination of the two viruses have? I immediately continued to check, and sure enough, these researchers did a combination experiment of R virus and X virus, that is, under the suppression of X virus, mutants can maintain their consciousness.

But this is only temporary, because the X virus and the R virus exist in the body at the same time, once the X virus is destroyed, that is, the body is severely damaged, the R virus will lose the suppression of the X virus, and at this time it will lose its consciousness.

It is not until the X virus suppresses the R virus again that the whole person's consciousness is restored, and the process is about two to six hours.