In a sparsely populated grassland in the desert of the earth, a hemispherical object with a diameter of about three thousand meters and composed of black mist slowly rotates, this spherical shape is black, slowly rotates, and from time to time emits black filamentous objects of different sizes from the sphere to the outside world, these filamentous objects leave the surface of the sphere and enter the air and slowly spread, like a drop of ink dripping into the water, itself slowly fades, but the surrounding area also slowly changes from colorless to light black, and then reaches a balance point - gray.

With this ball as the center, there is no difference between day and night within a radius of three kilometers, there is a dark fog everywhere, it is already a dark night, and it is in a gray state from three kilometers away to thirty kilometers away, even if it is in the sky at noon, it is equivalent to dusk approaching the evening, and the visibility is already very low, the closer to the spherical object, the lower the visibility, until it is close to a certain range, and the visibility is completely lost, and it becomes a darkness.

When the black sphere rotated, the energy fluctuations that were invisible to the naked eye spread out like water waves, and a roar came from time to time in the area covered by the black mist, these roars were sometimes long and sometimes short, this kind of roaring sound is not like any animal on the earth can make.

Many inky black filaments emanate from the surface of the rotating sphere, and then merge into the air, making the closer to the sphere, the more black it appears, and these black areas continue to transmit black to gray areas, and the gray areas slowly turn colorless areas into light black, so that the black fog area and the gray fog area continue to expand slowly.

From the satellite, it looks like a "concentric circle", the radius of the small circle is 1.5 kilometers, and the pitch black seems to become a substantial object, and the large circle outside the small circle is gray, the closer to the center of the circle, the darker the color, and vice versa.

Judging by satellite maps, there are dozens of such "concentric circles" of various sizes scattered throughout the planet. Among them, the concentric circles of western China, Tunguska in Siberia, Russia, Mexico, the Strait of Gibraltar, and New Zealand are the most conspicuous, among which the concentric circles of Tunguska are the most huge.

The diameter of this huge concentric circle in western China has reached 10 kilometers, and the diameter of the large circle is nearly 100 kilometers. This concentric circle is slowly spreading.

At the eastern edge of this concentric circle, a group of soldiers are fighting with a group of monsters that are not on the earth with the help of rock masses, the most black of these monsters, the whole body is protected by a layer of dark and shiny carapace, more than 3 meters high, with limbs, standing and walking, the head is a bit like a mantis monster, limbs and a huge mouth can easily tear apart a cow, this monster can be killed by a gun as long as it is not close, the soldiers call this monster the black armor beast, it is one of the most common monsters, and it is also the monster with the weakest attack power, Of course, this weakness is equivalent to their kind, not the creatures on Earth.

The second is a three-meter-long, crawling, a bit like a lizard-like monster, this monster is extremely fast, very flexible, has a strong climbing ability, the tongue can spit out a meter long, can easily penetrate the recognized head, the soldier calls this monster a long-tongued reptile, but in front of the army combat unit, it is only torn to pieces, so it is not terrible.

Again, it is a monster that is similar to a combination of worms and earthworms up to tens of meters, this monster can burrow into the ground, suddenly appear and swallow the prey alive with its mouth, this monster is the most powerful long-range attack, this monster can spew out a strong acid volatile liquid, this liquid can quickly volatilize into gas when it comes into contact with people, as long as you breathe these gases, you will be poisoned, dizzy and dizzy, and you will die directly, you can spew out as far as three hundred meters away, and the soldiers call it a giant worm beast, But under the blow of the army's artillery group, it only turned into cannon fodder.

The most headache for the army is a monster that looks similar to the Predator and the alien hybrid, more than three meters high, with a tail of almost two meters, this monster is perverted fast, can fly for a short time, all parts of the body of this monster are basically weapons, if one rushes into the army for a few minutes can slaughter hundreds of people, the most terrifying thing is that this monster is going to hit it with bullets, and there will be a faint protective shield on the body, which can attack most bullets at the moment, even if some bullets penetrate the protective shield to hit its body, It is also resisted by a strong body.,And this monster has a strong self-healing ability.,It's a nightmare for the soldiers.,Once you're close to it, it's almost a down-and-down kill.,This monster is a alien monster.。

Not only that, but the sky is densely covered with monsters with flesh-winged bats like bats, this kind of monster is almost the size of an adult, with wings that can reach a width of fifteen meters, and its limbs are full of sharp claws that can tear apart an adult, this is the air power of the monster batmon.

These soldiers did not panic at all in the strong impact of this group of monsters, the machine gunners of the troops were unhurriedly strafing, the heavy machine guns made a knotted "click" sound, and the snipers stood in a position with a good view and calmly shot at potentially dangerous monsters, so that those ferocious monsters were sniped before they could get close to the position.

Judging from the fighting qualities of this group of soldiers, it is obvious that this is a team of elite soldiers who have fought with these monsters many times, and there is a special symbol on the uniforms of these soldiers, a map of a Chinese rooster and then a sharp sword is placed in the middle of the rooster from top to bottom, and there are four big letters on the rooster territory DFSJ.

What's even more noticeable is that there are soldiers in this army who can take cold weapons and these monsters, and these soldiers with knives can jump more than four or five meters away, and some soldiers can even produce flames out of thin air in their hands and shoot accurately at the monsters that rush over, instantly burning the monsters that rushed over to ashes.

On the command vehicle not far from the defense line, a young man about 25 years old was holding goggles and carefully observing the monster that was constantly charging in front of him.

"Report, company commander, call from the military headquarters." A sonorous voice rang in the young man's ears.

The young man slowly lowered his binoculars and walked quickly into the command car.

"I am Chen Gang, the commander of the Fourth Investigation Company of the Oriental Excalibur Special Brigade of the Shangjing Military Region, please instruct." Chen Gang picked up the microphone and said in a deep voice.

"Xiao Chen, you can retreat, retreat to Quancheng according to the original plan, and then to Anshi." An old voice came from the microphone.

"Yes." Chen Gang was concise and hung up the phone.

Chen Gang walked out of the command vehicle quickly and said to the herald beside him: "Go down with the order, and retreat under cross-cover according to the original plan." ”

"Yes." The soldier saluted and walked away quickly.

Chen Gang watched the soldiers leave, looked into the distance, and silently returned to the command vehicle.

"Brother Chen, the task is complete, you seem to be very unhappy." Chen Gang sat down, and Liu Tao, the deputy company commander behind him, asked curiously, although Liu Tao is about the same age as Chen Gang, they both belong to the kind of people who have a backstage, but Chen Gang has outstanding ability and treats people very well, so Liu Tao has always been called a big brother.

"Our mission was accomplished, but the overall strategy of the operation failed." Chen Gang lay on the seat, fascinated his eyes, and said slowly.

"Didn't the institute be successfully withdrawn?" Liu Tao looked at Chen Gang suspiciously, the research institute is an extremely important part, and there is a very important scientist in it.

"According to the time, if it goes well, the team that responds to the research institute is now arriving at the research institute." Chen Gang opened his eyes, sighed and continued: "We didn't have any powerful monsters in this battle, if you guessed correctly, those ferocious monsters should have been attracted to the vicinity of the research institute." ”

"Brother Chen means that the rescue team is completely wiped out." Liu Tao opened his mouth in disbelief, fighting with high-level monsters in the area close to the concentric circles was like looking for death, even if he lured the armored troops.

"Perhaps, or maybe the research institute has been breached before the rescue team arrives." Chen Gang's eyes showed a sad look, because one of the people who participated in this rescue operation was his close friend, in fact, Chen Gang understood that the possibility of the latter was extremely low, and this sentence was actually comforting himself.

Seeing that Chen Gang was reluctant to speak, Liu Tao closed his mouth very interestingly, lay quietly on the command car, felt the bumps of the command car walking on the road, and slowly closed his eyes. The convoy retreated all the way in the direction of Quancheng.