In the face of the mutant brown bear rushing over, Ye Feng did not have the slightest fear on his face, he was still the same ancient well, but Ye Feng's movements were much faster than usual, constantly operating and controlling the excavator.

Under the control of Ye Feng, this large excavator was quickly straightened, and the mechanical arm was slowly lifted under the control of the hydraulic system, making a state of preparation for battle.

Just when the mutant brown bear rushed to a distance of twenty meters from the excavator, Ye Feng suddenly controlled the operating lever, and the mechanical arm raised high by the excavator suddenly dug towards the mutant brown bear.

"Khooth!" In the face of Ye Feng's pre-embarking blow, the mutant brown bear suddenly raised its arm, and its sharp bear claws with a metallic luster blocked the mechanical arm, making a dull impact sound.

The excavator's robotic arm collided with the mutant brown bear, and the mutant brown bear raised its huge arms and grabbed the pressed mechanical arm.

Seeing that the mechanical arm was blocked by the mutant brown bear, Ye Feng continued to increase the horsepower, the engine of the excavator immediately let out a roaring sound, and bursts of dense black smoke came out of the exhaust pipe, and the hydraulic system continued to press down the mechanical arm under sufficient energy supply.

"Roar!" Feeling the increasing pressure on the mechanical arm above his head, the mutant brown bear roared, and suddenly exerted force, and actually supported the slowly pressing mechanical arm, and the entire excavator was slowly tilted because the mechanical arm was lifted.

Seeing that the excavator with full horsepower was actually propped up by the mutant brown bear, Ye Feng frowned slightly, you must know that the mechanical arm of this large excavator has extremely strong strength and can dig up a few heavy stones.

"Click!" A few seconds passed, the excavator's mechanical arm made a sound of unbearable pressure, not only that, but such an overload of the starting engine also made the excavator's engine a little unbearable, and it may strike at any time.

"Brother, hold on, I'll come over right away." Just when Ye Feng was a little helpless, a rough voice sounded on the walkie-talkie, and this voice was made by Zhang Hu.

As Zhang Hu's voice sounded, an excavator with a broken head slowly appeared, and then under Zhang Hu's precise control, the broken head of the excavator quickly and accurately penetrated into the blood hole on the back of the mutant brown bear.

For the abnormality that appeared behind him, the mutant brown bear naturally discovered it, but now it lacks skills, and all its energy is used to deal with Ye Feng, and the mutant brown bear is also very confident in its own defense, so it does not pay too much attention to the broken head in the blood hole behind it.

Zhang Hu controlled the broken head, quickly found the vertebrae of the mutant brown bear, and put the broken head against the thick vertebrae of the mutant brown bear, and then immediately started to crush.

"Bang bang bang bang————" A rapid sound of broken heads sounded, and the broken heads began to shatter on the brown bear's vertebrae.

After mutation, the mutant brown bear's bone strength has increased a lot, but in the face of the broken head that can easily break the thick cement floor, it still can't be stopped, and after a few breaks, the vertebrae of the mutant brown bear are directly smashed by the broken head.

"Roar!" As the vertebrae were shattered, the mutant brown bear fell to the ground in a terrible scream, and without the support of the spine, the mutant brown bear's body was like a puddle of mud.

After the mutant brown bear fell to the ground, the mechanical arm that was originally pressed on the top of the mutant brown bear's head lost its blocking power, and suddenly dug down and dug the chest of the mutant brown bear, and the bucket on the mechanical arm directly left several blood holes in the chest of the mutant brown bear.

In line with the style of taking advantage of your illness to kill you, Ye Feng immediately continued to control the mechanical arm, so that the digging bucket kept smashing the mutant brown bear, and every time he smashed it, the mutant brown bear let out a painful howl.

Although the mutant brown bear's spine was broken, the mutant brown bear's vitality was very strong, even if Ye Feng constantly controlled the mechanical arm to let the bucket keep smashing the mutant brown bear, he still couldn't kill the mutant brown bear in a short time.

The mutant brown bear lying on the ground, the combat power is still very strong, he raised his hands, grabbed the smashed bucket, no matter how Ye Feng controlled the mechanical arm, he still couldn't break free from the huge bear paws of the mutant brown bear.

"Damn, I see how long you can struggle!" Zhang Hu saw the mutant brown bear that was still dying, and while scolding, he controlled the operating lever of the excavator and began to assist Ye Feng in killing the mutant brown bear.

Zhang Hu drove the excavator to the mutant brown bear, controlled the crushing head on the mechanical arm, pressed against the head of the mutant brown bear, and immediately began to shatter.

"Roar ---" The mutant brown bear let out a roar of pain, and the huge bear head was directly shattered by the broken head under the high-frequency impact of the broken head.

The mutant brown bear's head was shattered, and he instantly lost the control power of his arm, Ye Feng took the opportunity to control the mechanical arm, and then slammed it down, and the huge digging bucket smashed the neck of the mutant brown bear, which made the brown bear let out a miserable howl.

With the cooperation of Ye Feng and Zhang Hu, in less than five minutes, the mutant brown bear was already blurred with flesh and blood, no longer moving, and was completely killed.

After killing the mutant brown bear, Ye Feng immediately jumped off the excavator, jumped next to the mutant brown bear's head in a few steps, took out a sharp saber from his body, and quickly removed the green crystal nucleus on the mutant brown bear's forehead.

"That's right, according to this condition, it should be in the late fourth order." Ye Feng took this dark green crystal nucleus in his hand and looked at it, feeling the huge energy fluctuations contained in it, and his face showed a hint of satisfaction.

This fourth-order crystal nucleus taken from the forehead of the mutant brown bear contained extremely large amounts of energy, far exceeding the fourth-order crystal nuclei of other mutated creatures, and even the energy contained was almost close to the level of the fifth-order crystal nucleus.

Although the volume of all mutant crystal nuclei is absolutely identical, even if they are all late-stage fourth-order crystal nuclei, the energy contained in them is worlds apart, for example, the energy contained in the crystal nucleus of a fourth-order mutant brown bear will far exceed the energy contained in the crystal nucleus of a fourth-order mutant wildcat.

After fusing the phagocytosis gene, Ye Feng could directly devour the crystal nucleus without the need to extract the evolution liquid, therefore, this high-quality fourth-order late-stage crystal nucleus was enough to greatly increase Ye Feng's strength, and even directly let Ye Feng break through the two-star and reach a three-star evolutionary.

Many survivors of the Self-Rescue Association convoy saw Ye Feng collect this mutant crystal nucleus, and many of them also knew the value of this fourth-order green crystal nucleus, but no one stepped forward to ask, after all, this mutant brown bear was almost killed by Ye Feng.

Shi Gaosen, Yang Long and other high-ranking members of the Self-Rescue Association looked at the fourth-order crystal nucleus in Ye Feng's hand with envy and jealousy, knowing that a fourth-order crystal nucleus could be exchanged for dozens of first-order evolution liquids.

If it is exchanged for other daily necessities, it is a large amount, enough for a person to live in peace at the Dacheng base for several years.

Just when Ye Feng was about to put this crystal nucleus in his trouser pocket, he suddenly felt a feeling of shock, and an extremely dangerous feeling suddenly surged from his heart, making Ye Feng couldn't help but shiver, as if he had fallen into an ice cave all of a sudden.

This feeling was too familiar to Ye Feng, it was an instinct for danger, and Ye Feng understood that he had been locked by a powerful mutated creature.

Ye Feng turned his head abruptly and looked in the direction of a forest on the left, a trace of solemnity appeared in the depths of his eyes, and it was from this direction that the danger came.

Just as Ye Feng turned his head, there was a "rustling" sound from the depths of the woods, and I saw that the lush grass continued to separate to both sides, and the screams of some mutated creatures could be heard.

As the sound of "rustling" in the woods became more and more dense, the other members of the self-rescue team also noticed the abnormality and looked at the place where the sound came from.