"Boom!" A violent popping sound sounded, and the fourth-order mutant bison king collided with the roller at an extremely fast speed, as if the mutant bison the size of a giant elephant and the heavy roller rolled to the ground at the same time.

The huge heavy-duty roller has been severely deformed due to the violent impact, and the heavy-duty wheels of the front roller are deeply dented, forming a bull's head shape, which is obviously no longer usable.

Not only that, the entire roller cab has been seriously deformed, and Zhang Hu is also trapped inside, unable to come out at all, becoming a turtle in an urn.

This fourth-order mutant bison king was also uncomfortable, his appearance was extremely miserable, the two big horns that were originally sharp and shining with metallic luster had been broken, and even one of the horns was broken from the root, and a large amount of black-brown blood flowed out from the root.

Although the fourth-order mutant bison king is very powerful, after all, he is still a mortal in the flesh, and it is impossible to easily destroy it in the face of the engineering vehicle crystallized by human science and technology, for this, this mutant bison king has paid a heavy price.

"Moo!" The mutant bison king stood up from the ground and let out an angry roar, a pair of bloodthirsty bull eyes staring at Zhang Hu in the cab of the road roller, obviously not expecting that this humble human in front of him could be severely injured by it.

The mutant bison king slowly walked towards Zhang Hu, his blood-red eyes full of anger, and opened a huge bull's mouth, which was densely covered with canine fangs.

These teeth are clearly very different from the average bison, and the sharp teeth clearly indicate that these mutant bison are not vegetarians, but aggressive carnivores.

"Lao Tzu can give you half a life, and it's worth it to die." Looking at the mutant bison king who was getting closer and closer, Zhang Hu showed a playful smile on his face and said with a nonchalant expression.

Zhang Hu originally had a happy family, a beautiful and virtuous wife, and a well-behaved and obedient son, but the disaster changed everything, and his wife and son died on the first day of the disaster.

Zhang Hu, who lost his wife and children, was grief-stricken, and he had already put life and death aside, and his only hope was to be able to kill more monsters in order to avenge his dead wife and children.

"Bang!" Just when Zhang Hu had closed his eyes and was about to accept the verdict of death, a crisp gunshot rang out, and then, the mutant bison king who walked towards Zhang Hu with a ferocious face stagnated, and a blood flower bloomed on his forehead, and the green crystal nucleus embedded in his forehead was directly exploded by a shot.

The crystal nucleus is one of the weaknesses of mutant creatures, just like the human heart, as long as it is burst, it is almost equivalent to the human losing the heart, and it will die in an instant, and this mutant bison king is no exception, and the huge body fell to the ground at once.

Zhang Hu opened his eyes suddenly, the huge mutant bison king had fallen, Zhang Hu immediately turned his head to look in the direction where the gunshots came from, and saw a young man slowly retracting his rifle, this young man was none other than Ye Feng.

"Hurry up, the battle isn't over yet!" After Ye Feng put away the rifle, he dodged a few times and appeared next to the road roller, and then waved the alloy war knife in his hand, broke the iron sheet of the cab, and pulled out Zhang Hu who was trapped inside.

Ye Feng rescued Zhang Hu, the main reason was to appreciate Zhang Hu's driving skills and courage, as well as the adaptability of the battlefield, if Zhang Hu hadn't rushed out in time to block the mutant bison king and successfully hit the other party, Ye Feng would not have been able to easily snipe this mutated creature.

It's just that what makes Ye Feng a little pity is that the crystal nucleus on the forehead of this mutant bison king has been exploded, and humans and mutant creatures are fighting, if they can't collect the crystal nuclei on the forehead of mutant creatures, even if they kill mutant creatures, it is almost equivalent to doing useless work.

Mutant creatures have super reproductive ability, and if humans want to fight with mutated creatures, it is almost to find death, only by constantly killing mutant creatures, obtaining crystal nuclei, and improving their own strength, otherwise it is useless to kill many mutant creatures.

"Brother, thank you for your great kindness, my Huzi's life will be yours in the future." After Zhang Hu was rescued by Ye Feng, a grateful expression appeared on his face, and he said in very solemn words.

"Let's go back!" Ye Feng grabbed Zhang Hu and dragged him directly to an excavator in the team, the driver inside the excavator obviously knew Zhang Hu, and immediately opened the car door and let Zhang Hu in.

After Ye Feng killed the fourth-order mutant bison king, the convoy continued to move forward, and the convoy was still constantly attacked by various mutant creatures along the way, but the convoy did not rescue those attacked vehicles.

Even if the bus in the convoy is overturned by mutant creatures, and the dozens of survivors in the bus become turtles in the urn, the convoy will not rescue, because the convoy has no time to rescue, as long as it stops, it will immediately fall into the sea of mutant creatures.

The Humvee Bigfoot driven by Ye Feng's team, because it was in the safest position of the convoy, coupled with the team's strong combat effectiveness and sufficient firepower, it was not attacked too seriously along the way.

In the desperate charge of the convoy, after the loss of 6 buses, 5 heavy trucks, 3 excavators, and more than a dozen off-road vehicles of various types, the convoy of the Self-Rescue Association finally rushed out of the mountainous section.

"Roar!" However, just as the convoy was about to rush out of the mountainous section, a chilling roar suddenly occurred in the distance, and at the same time, a bulldozer in front of the convoy overturned directly.

It wasn't until the excavator was overturned that everyone could see what kind of mutant creature had attacked the bulldozer, and they saw a mutated brown bear with a height of nearly ten meters and brown hair all over its body, standing in the way of the front of the convoy.

"Fourth-Order Mutant Brown Bear!" Ye Feng, who was standing on the roof of a heavy truck, frowned when he saw this huge figure.

Before the catastrophe, brown bears were one of the most ferocious animals on land, with three to five times more strength than adult men, and could easily shatter the hardest human skulls with a single fist.

There was a man-bear battle in history, where a strong man with a height of more than two meters encountered a brown bear in the process of logging in the American lumberyard, and the American thought that he was so powerful that he could kill a leopard with his bare hands.

But in less than a minute of confrontation with the brown bear, the brown bear tore his cheek with one paw, and then with another claw, the American Hercules' head was shattered like a watermelon, which shows how powerful the brown bear is.

Although this mutant brown bear is only of the fourth order, the old bear was a very powerful animal before the disaster, and after the mutation, it is almost an invincible existence in the same level, and this powerful mutant creature can not only easily defeat the existence of the same level, but can even challenge the next level.

A first-order mutant brown bear can completely kill a second-order zombie, which shows that this mutated creature is strong and terrifying.

After the mutant brown bear overturned the bulldozer, the action did not stop, raised a fist the size of a grinding disc, and aimed at the overturned excavator cab is a hard punch, directly deforming the cab, and the two people inside were directly squeezed into meat by the deformed car body, and blood was splashed.

After the mutant brown bear killed the two people in the bulldozer with one punch, he turned his head to look at the other bulldozer next to him, raised his huge fist, and prepared to attack the other bulldozer.

"Not good!" Seeing the action of the mutant brown bear, Ye Feng secretly said in his heart.

If both bulldozers are overturned by this mutant brown bear, then the rest of the journey will be very difficult, and without the bulldozer clearing the obstacles in the road, the speed will be severely reduced.