There was an explosion in the underground bastile mine, because the balite mine almost wrapped around the entire earth, stretching and continuing, so the explosion spread to the entire earth's underground in an instant. The majestic energy eruption has led to volcanoes, earthquakes, tsunamis, storms and other sudden and strong natural disasters, so that human beings have no time to react and cope, a large number of human deaths, and only five or six billion people are left in the world's 10 billion people.

And some unknown monsters have also emerged from the ground.

After the "frequent" period of natural disasters has passed, the entire earth is filled with violent energy particles. Humanity has not had time to grieve, because even survival seems to have become a luxury. Under the influence of the rampaging energy particles, the crops that were able to be planted before can no longer be cultivated. At that time, there were very few biological mutations, and although the monsters that emerged from the ground woke up, they were not many in number, and they rarely attacked humans.

In the months that followed, scientists invented energy guards that used balite as an energy source to barely build an entire ecosystem. As a result, more and more people gathered, and gradually evolved into a city.

At this time, many human beings who were exposed to energy particles began to die due to the erosion of energy. However, there are also a few humans who seem to be able to absorb and use these energies effectively, so they gradually develop a system of warriors to deal with the gradually alienated creatures.

Today's human society is built on the ruins of a once glorious place, and in this cruel environment, human beings are beginning to overcome obstacles like their ancestors and prepare to stand on the top of the earth again, and this requires the combination of individual strength and collective wisdom.

That's what the book says.

The speed of the train has not changed, but the landscape outside the window has been changing, and the plains described in the book have now become dense forests, and there are a large number of mutated creatures living in the forests, all of which are threats to humans.

Xu Fei understood that the reason why those mutated creatures were powerful was because they had been baptized by energy particles. For the natural world, the way in which the race continues is by adapting to the environment. In the past, there were tens of millions of species on the earth, and most of these species became extinct in the drastic changes of the environment more than 150 years ago, and only a few organisms adapted to the harsh environment and evolved and mutated.

Over the past 150 years, a large number of new species have been created, and new ecosystems have been gradually established. The whole earth is like the explosion of life after the extinction of the dinosaurs, but compared to that era, the current era is more rapid because of the relationship between energy particles.

Human beings are naturally fortunate because they have a quality that other races do not have, and that is intelligence. In the early days of drastic changes in the environment, humans built a protective shield and did not have to passively adapt to changes in the environment like other races, so the human race continued. If human beings, like other races, passively adapt to changes in the environment, I am afraid that today's human beings are almost extinct, and perhaps there are people among human beings who can adapt to environmental changes, baptized by energy, and produce mutations. But I'm afraid it's not the current human race, and I'm afraid there won't be many of them.

An hour passed, and although the scenery outside had not changed much, Xu Fei still felt very fresh, because the outside world was completely full of unknowns for him.

At this time, a group of birds in the sky were frightened, densely packed, and indescribable birds rushed to fly into the distance, even the "red" level red eagle that Xu Fei had seen was also among them. Then a black cloud floated in the sky, and the thunder and lightning rolled, and the originally clear sky instantly dimmed, and the violent thunder roared so that the whole train buzzed.

A strange aura hit, a little depressing, making people feel inexplicably irritable, but they couldn't tell what the reason was for the irritability.

All the students in the bus felt the change and fastened their seat belts. Xu Fei looked at the sky outside, the electric snake flashed in the clouds, and in the flickering light and darkness, Xu Fei seemed to see a huge figure hiding in the clouds.

Although this cloud layer is not high, it is still far away from Xu Fei, Xu Fei feels that it is likely that he has thought too much, if there is really a creature in the cloud, with the figure he just saw, then the size of that creature is unimaginably large, how is this possible?

There was a boom. Under the impact of violent thunder, the entire train shook, and then a transparent film of light wrapped the entire train, making the train stable.

It's a shame that all the students are wearing seat belts, otherwise they must have staggered, but there are still many students who are scared enough by this thunder sound.

"That's?" Zhang also exclaimed.

The student sitting on Xu Fei's side immediately looked out the window, only to see that the clouds cracked, a huge figure fell from the sky, blood sprinkled all over the sky, it was a huge bird creature, dark green all over, if it spread its wings, it was about more than a hundred meters, the feathers on its body were shining with electric light, and the whole image was like an enlarged red eagle, but the color was wrong, and there were three cyan feathers several meters long on the head.

"Oh my God! It's a green-level behemoth. Zhang also exclaimed.

Zhang Ye's exclamation immediately attracted more people's attention, but the other half of the students in the carriage were wearing seat belts and did not dare to open them easily.

The thunder light was distorted from the huge cyan body, and the air below was distorted by the cold electric light as it fell, making a crackling sound.

Even if they were thousands of meters away, everyone in the carriage could feel the shiver and numbness caused by the thunder and lightning.

"This kind of monster, I'm afraid that if you get close to it, you will be electrocuted five hundred meters away, right?" Xu Fei had this thought in his heart at this time.

At this time, the giant eagle let out a roaring cry and fell from the sky, its huge eyes were looking coldly at the sky, its mouth was open, and a huge thunderbolt gushed out, tearing through the sky and striking towards the thunderclouds in the sky.

Snort. The air was smoking.

The thunder rushed to the thundercloud, but before the thundercloud, a fierce brilliant knife light split the clouds, directly down, shattering the thick thunder, the broken thunder scattered in all directions, fell to the ground, made a huge sound, there was a broken "electric spark" fell next to the train a few hundred meters away is a small dirt slope, where there was originally a huge boulder, but the "electric spark" fell, the boulder was directly split into pieces, scattered in all directions.

In the sky, the sword light shattered the thunder light, and the trend was still falling, and it had the momentum to cut the giant eagle in half.

The electric light flashed in front of the giant eagle, turning into an oval force field, trying to block the sharp and brilliant knife light, but as soon as it came into contact, the force field was instantly torn apart, and the abdomen of the giant eagle was cut open, and blood flowed for a long time.

The giant eagle hissed again, with horror in its eyes, and with a turn of its body, it spread its wings, and thunder and lightning gathered. The dark clouds quickly gathered towards its body, and with a flick of its wings, it broke through the air, leaving behind a roaring sound that disappeared into the sky.

In a split second, the battle was over.

The giant eagle fled, and the dark clouds in the sky dispersed. And Xu Fei relied on his extraordinary eyesight to barely find that when the giant eagle fled, a black line crossed the dark clouds, chasing in the direction of the giant eagle fleeing in the distance.

All the students sitting on Xu Fei's side were shocked by the scene just now, and they couldn't speak for a long time, and even Yu Zhenxing, who was sitting next to Xu Fei, rarely showed a shocked look.

"What's going on?"

Seeing that all the students in the left compartment showed shocked expressions, one of the students sitting on the right asked questions, they wanted to know what had just happened.

"Obviously, there was a strong human race just now fighting with the 'Green Feather Thunder Eagle'." Zhang also came back to his senses and said excitedly.

"Blue Feather Thunder Eagle? What level of monster? The result? ”