There is a glass curtain wall in the hall outside the vault. After the outbreak of a strange disaster, the glass curtain wall was protected by a thick metal window, which is why there is no sunshine in the hall.

The steel gate window slowly closed under a slight sliding sound, and dazzling sunlight shone in.

After adapting to the light, people looked out of the window and gasped. Outside the window, there was a huge black vortex formed by a special shape, with a magnificent scene and extremely spectacular.

The vortex rotates counterclockwise at a height of hundreds of meters. On the vortex, black aliens like bats are added to the huge vortex from time to time, like moths to a flame. These aliens thrown into the vortex immediately glided and flew with the vortex. As the aliens continued to join, the vortex became thicker and thicker, like a black dragon connected to the head and tail.

It is no exaggeration to describe this alien tide. In fact, at this time, because a large number of aliens circling in the same direction, a huge airflow was launched in the air, and the airflow actually produced a vortex-like suction force. The dust and shreds of paper on the ground were sucked into the sky with the vortex, and it also flew with the vortex, making the vortex appear more and more rushing.

What a terrible alien tide!

Looking at the increasingly dark sky, Zhou Qing's delicate body was trembling, and a fearful look ejaculated in his eyes. In fact, it was not just Zhou Qing's face full of fear, but the five big men and a group of teenagers all looked dull.

Anyone who hangs around on the Dow Star knows the horror of the alien tide.

In fact, there are many types of alien tides. The alien tide that runs wildly on the ground is also an alien tide. The alien tide that flies at low altitude also belongs to an alien tide. When it appears in space cracks, large-scale alien tides can also form.

Among those diverse alien tides, the most powerful one is the alien tide formed instantly from space migration, because at this time the alien tide formed a height of hundreds of meters. If this height dives in a keratinized form, it can form a terrifying impact force. An alien can destroy a mecha weighing dozens of tons.

In previous battle examples, the biggest casualties caused by the alien to humans was the moment it came out of the space crack. The fearless collision without any warning made humans' high-tech means unable to play a role at all.

Usually, the first batch of aliens that emerged from the cracks in the space were dead soldiers. They completely committed suicide by dying. Therefore, this kind of attack is also the most terrifying, terrifying and deadly catastrophe. Often, after a round of charge, a city's power, transportation and communication systems are destroyed, some ground defense systems are basically paralyzed, and many established ground troops are directly eliminated.

There is no doubt that high-altitude suicide dive is the most primitive battle, but because of its location uncertainty, suddenness and no warning, humans have not yet found a specific way to deal with alien high-altitude dives.

——

"It's over, it's over, a large number of aliens migrated from outer space to Xicheng District, and we were surrounded." Zhou Qing tried hard to slow down his speech and tried his best to calm his emotions. As an excellent soldier, she knew very well that panic would only make her die faster.

"Yes, we are trapped." The five big men obviously did not have the psychological quality of Zhou Qing. They stared blankly at the huge black vortex outside the window, their faces pale. The joy that was immersed in the billions of federal coins just now was wiped out.

Among these people, only Liu Fei and Ajing remained indifferent, and even the teenagers and mercenaries looked palpitations.

In fact, those who have a little understanding of aliens know the terribleness of alien tides coming out of space cracks.

The aliens that emerge from the space cracks are more fierce and more fearless than ordinary aliens. According to scientists' research, this is because the aliens lose a lot of heat energy during long-distance migration. The aliens at this time are very hungry and will attack any moving targets wildly.

"Look at you." Ah Jing's eyes fell on Liu Fei's face.

"No, it depends on you."

"Who said that he wanted to protect us just now?" A sarcastic sneered sneer on his face.

"If our agreement is agreed, I will naturally protect you." Liu Fei's ridicule at Ajing was not unique, and he looked calm.

"I am just 10% like them. If you can get me to Dongcheng District safely, I only have one billion federal coins. However, ugly words can be said to be ahead. If you cannot provide protection or let me participate in the battle, then the agreement between us will be without any binding force." Zhou Qing rushed.

"Of course." Liu Fei glanced at the increasingly larger vortex outside the window.

"Okay, one word is certain."

"I don't believe you." Ajing snorted coldly.

"Ajing, even if he hid in the basement, it would be impossible to survive this alien crisis." Liu Fei looked at Ajing with a blank expression.

"Ah--you-how do you know?!" A Jing's face changed color. He could not have imagined that Liu Fei had guessed his intention.

"From the moment, for some unknown reason, this building is an alien base camp. When you rushed into the building, you killed a large number of aliens. There is no doubt that your actions alarmed the high-level aliens in this building. They organized a series of encirclements, but this encirclement was broken because of my appearance—"

"Your appearance! Hahaha--" A Jing burst into laughter with a long sword in his hand. The laughter was filled with endless contempt. "What do you mean is that if you did not appear, we would have been surrounded by a huge siege of aliens?"

"Yes."

"I want to hear how you saved me."

"When you climb up from the first floor, do you have more alien shapes as you go up?"

"—" Ajing opened his mouth and looked at a group of teenagers without saying anything. Obviously, Liu Fei was right.

"As the floors get higher and higher, there are more and more high-level aliens. At the same time, you have suffered casualties, are you?"

"—Yes!" Ajing hesitated for a moment and nodded. He was not a person who was good at lying, not to mention that the facts were in front of him.

"Just when you were almost unable to withstand the number of aliens suddenly decreased. When you approached the 150th floor, the aliens completely disappeared. Do you know the reason? Because, I know you are below, so I sent someone to guard the stairs and kill the aliens. I believe you have also seen the mountain of alien corpses."

"This is just a coincidence." Looking at Liu Fei, who was only a few years older than him, an inexplicable chill rose on Ajing's back. This person was so terrible, and his every move was actually under his calculations.

"Coincidence? Haha, we have at least dozens of ways to block the door of the fire passage." Liu Fei glanced at the alien vortex outside the glass curtain wall again.

"You want to tell me that you saved us!"

"No, I just tell you that it's useless to avoid the alien tide. The alien will not give up on this building. Moreover, the aliens that form alien tides in the sky do not migrate from outer space. They are all aliens born on Zoer Star and born and raised in the native world—"

"As far as I know, aliens do not have high-altitude flight capabilities. If they did not migrate from outer space, then, would they be any flights hundreds of meters? We are now on 150 floors."

Ajing glanced at the increasingly terrifying black vortex outside the glass curtain wall, and slowly retreated into the vault. At the same time, a group of teenagers also followed him back into the vault.

Seeing Ajing retreating towards the vault, the five great men and Zhou Qing also subconsciously retreated towards the vault.
Chapter completed!