This operation is not as simple as cleaning up the building. Duan Fei must walk 16 kilometers alone and come back after getting the source seed.

An hour's journey, although the walking corpses on the street during the day have basically dissipated, there are still some solitary zombies wandering.

For these scattered walking corpses, you can avoid Duan Fei as much as possible. If you can't, with Duan Fei's evolved body, it's still no problem to deal with a few. However, walking corpses are secondary, and there is another more dangerous than walking corpses, that is "exotic animals".

When the last day comes, not only humans, but also all kinds of animals will be infected by the virus and become exotic animals.

No matter how docile animals are, as long as they are infected by the virus and become exotic animals, they will become extremely bloodthirsty and violent. They eat people and walking corpses, and their strength is more than twice as strong as these low walking corpses.

Imagine that a dog's sense of smell is about 40 times that of ordinary humans. Once it becomes an alien and its sense of smell is strengthened again, how destructive it will be.

Or the cat with particularly strong jumping power and speed becomes an alien. After it evolves again, what walls and obstacles can stop it.

These animals are very common pets in some cities. When they become monsters, they can become absolutely deadly monsters. The most terrible of these is not the others, but the social creatures.

Like mice, like ants.

When they come out to look for food, nothing can stop them. Wherever they go, let alone humans, almost all moving things will become their food.

Of course, Duan Fei's luck can't be carried back to the animal tide when he went out for the first time. However, meeting any strange animal, even a kitten or dog, will cause him great trouble, which is the last thing Duan Fei wants to see.

Walking fast on the street, although the sun is shining now, Duanfei can still meet some walking corpses all the way. But with Duan Fei's careful avoidance, it's easy to bypass them.

The vision of low-level walking corpses can only see things within two meters. As long as Duan Fei hides well in the shelter, they basically won't find their existence with their vision. However, compared with vision, low-level walking corpses only rely on sound and taste to find their enemies.

Knowing the weaknesses of low-level zombies, Duan Fei was ready early, so he didn't have to worry that these zombies would find himself.

Time passed slowly, and Duan Fei was getting closer and closer to Tiankeng.

As the distance approached, Duan Fei gradually found that the number of wandering corpses began to slowly change. At first, it was just a single walking corpse. Now, some small groups of walking corpses have begun to appear.

To deal with these dense corpses, Duan Fei will use some stones, cans and other things to make a sound in the distance, so that he can attract them.

Dealing with these low-level walking corpses with IQ of 0, this simple method can play a big role.

Bypassing the walking corpses, Duan Fei finally came to the front of Tiankeng.

He hid in the crevice between the two huge concrete and looked forward. In his vision, the familiar "Huijia supermarket" has disappeared, replaced by a huge circular pit with a diameter of about 20 meters.

Around the Tiankeng, countless black carbon like objects were scattered. Bursts of black and gray smoke came out from above, and then condensed into a stream, pouring into the sky.

Seeing this scene, Duan Fei couldn't help but think of the scene of the meteorite falling.

The red meteorite fell from the sky with extremely strong flame and impact, and hit the ground directly from the top of the supermarket. The huge impact made the whole supermarket building collapse in an instant. The extremely high temperature of the meteorite itself quickly ignited all the commodities around it, and finally turned into a raging fire.

The fire burned all night, burning everything in it to ashes. Finally, he became the ruins in front of him.

After carefully observing the Tiankeng in front of him, Duan Fei saw that in the center of the Tiankeng, there was an irregular crystal object emitting light in the sun.

As soon as his eyes coagulated, a fiery color burst into his heart.

That must be the source species, the source of biological evolution.

When he saw the source seed, Duan Fei almost couldn't help rushing up and grabbing it, but reason still prevented him from doing so.

The origin species is the basic of the evolution of walking corpses, and there is little to say about their importance. Seizing the source species is not so simple. There must be a high risk in the dark pit.

Sure enough, from the Tiankeng, a low roar kept coming into Duan Fei's ears. In his vision, a walking corpse slowly appeared.

Previously, Duan Fei focused all his attention on the source species and didn't notice the walking corpses around the source species at all.

At this time, Duan Fei looked at it carefully and observed it. Over time, he found that the walking corpse was no different from an ordinary low-level walking corpse in terms of body shape, appearance and pace.

However, because he turned his back to himself and didn't turn around from beginning to end, Duan Fei couldn't see his face clearly. It was also for this reason that he hid in the dark and never dared to act rashly.

Time passed slowly, and Duan Fei's doubts became more and more serious.

No matter from which aspect, this is just a very ordinary walking corpse. It can't be a variant walking corpse at all. And today is only the second day of the end. How can there be a mutant walking corpse.

However, from just now to now, the walking corpse has been wandering aimlessly, but it has never revealed its front, which makes Duan Fei suspicious.

Is it unintentional? Or on purpose? Or is it all just your own paranoia?

When Duan Fei was uncertain, he suddenly found that the walking corpse had reached the edge of the Tiankeng. It raised its hands high, raised its head towards the sky pit, and sent out bursts of low hiss.

When seeing this picture, Duan Fei's eyes lit up and his doubts dissipated in an instant.

It is absolutely just an ordinary low-level walking corpse. The reason why it appears here must be that it accidentally fell into the Tiankeng.

Human beings are social creatures. Although they become walking corpses, some basic characteristics of human beings will not change.

Although these low-level walking corpses have no IQ, they are creatures who only know how to eat. However, they rarely have the nature of gathering places.

A large group of walking corpses gather to prey, and then have their own territory and habitat. This has nothing to do with IQ. It's a biological instinct.

The walking corpse in front of it fell into the Tiankeng. If it wants to find its own corpse group and return to the gathering place, it must climb up from the Tiankeng, so it will make such an action.

After knowing this, Duan Fei held the long gun tightly in his hand and slowly condensed his strength to the peak.

Relying on his level 3 agility, it takes about 2 seconds to rush from here to Tiankeng. A blow that gathers the strength of the whole body should be enough to kill the walking corpse.

Ending the battle in the shortest possible time will avoid a lot of noise. Otherwise, it will lead to other walking corpses, which is what he doesn't want to see.

The attack was just a moment. When Duan Fei's spirit was completely condensed to the extreme, he held the long gun tightly and rushed towards the walking corpse in the Tiankeng like lightning.

The roaring wind passed Duan Fei's ear. At this moment, all he saw was his head.

This blow will kill you.

The alloy spear and sword pierced the air and crashed down with a thunderous force. At this moment, Duan Fei seemed to have seen his head smashed and his brain splashed.

However, the next moment, when his long gun really attacked the zombie, Duan Fei's face suddenly changed.

"Zheng!"

A violent explosion was not the dull sound of the breaking of the body, but the sound of the breaking of the metal in the rapid trembling.

In Duan Fei's sight, when the long gun hit it, the expected picture did not appear. On the contrary, the distance of the whole gun began to shake, as if it hit something very hard, and the sharp knife fixed in the front of the iron bar broke instantly.

"No!"

Duan Fei immediately realized the danger. The walking corpse in front of him was not those low-level walking corpses, but the most dangerous beast.

The lightning flint saw that Duan Fei quickly stepped back and withdrew the iron rod that had lost the sharp knife from him. However, at this moment, a great force suddenly came along the stick. He looked up and did not know when a pair of slightly rotten hands had tightly held the other end of the iron stick.

At this time, the walking corpse finally turned around. What came into view was a white female face. Unlike other walking corpses, there is no rotten image on its face. If other things are removed, it is an ordinary woman.

However, when Duan Fei noticed his eyes, a silent fear suddenly filled his heart.

Ordinary walking corpses, their eyes are dim and turbid yellow. But it is different. Its eyes are dark, like a bottomless abyss. There is no other color except black.

Native species.

Duan Fei suddenly remembered a distant and terrible name.