The spiritual power of star beasts is divided the same as that of humans, from low to high, starting from F level, F, E, D, C, B, A, S, SS, SSS, to 3s as the upper limit of general judgment

. But the mutation level is the opposite. The mutation level only exists in star beasts, starting from A level, with A level as the lowest mutation, A, B, C, D, E, F, to F level mutation as the upper limit of judgment.

Generally speaking, C level mutant star beasts are rare.

Going up, the mutation of the king-level star beast is defined as the highest F level.

Alien beasts are found in the range of C to F. If their traces are found on the border, the garrison troops must report to their corps as soon as possible. The response strategy is to drive them away. The nearby garrison corps must rush to the rescue signal as soon as possible without delay.

Now...

Erya swallowed the water and started coughing violently. Feichu handed her a tissue. After her breathing stabilized, she raised her head. Erya's face was red.

Incredibly asked: "Are you sure?"

The communicator nodded and said truthfully, "We started measuring energy signals an hour ago. Because the distance was too far, we released a drone. The detected signal has just been sent back. After several comparisons, we have this result. The drone is still moving forward. The exact result may take another half an hour."

Erya looked up at Chi Yao, and the two exchanged glances. Chi Yao asked, "Only one star beast was detected?"

The communicator: "It is estimated that there are more, but the star beast with a clear signal is only the highest level one."

"How many more star beasts are estimated?"

The communicator: "Three to four adult star beasts, two of which should have just reached adulthood."

There was no need to exchange glances this time. Erya took a deep breath, "That should be it."

"Star beasts with a mental power of 3s or above and a mutation level of around D are already capable of establishing their own communities. If they are not companions, the mental power differences among star beasts in the community will be relatively large."

Erya lives alone on an asteroid and travels alone to various planets all year round. In addition, she has special abilities and is very familiar with the composition and structure of star beasts.

Chi Yao made the decision: "Immediately activate the defense system and notify the surrounding Fourth Army to prepare for defense together."

Fei Chu was a little confused, "Do we want to fight?"

Usually, when he heard 3s plus mutation, his first reaction would be to retreat.

Chi Yao glanced at Shi Xing and said pertinently, "The spiritual power of mature blue star people has a strong attraction to star beasts. Even if we want to drive them away, I'm afraid this group of star beasts will not give up."

When they were attracted by Shi Xing's spiritual power, the decision was no longer in their hands.

Er Ya quickly calmed down, "In fact, it is not necessarily a bad thing. As the level of the star increases, the barrier should also be strengthened. If there are no high-level star beasts, it is difficult to test the limit of the barrier."

And now, there is.

Er Ya: "If what we can detect now is a D-level mutant 3s star beast, then the remaining few will not be so strong, but they can be used to train the star."

Fei Chu: "..."

Er Ya was still thinking about training, he was short-sighted.

With the decision made, the army acted quickly.

Shi Xing followed Chi Yao, observing how he commanded the army, and learned from him how to do border defense and planning.

Some time in the afternoon, when communicating with the marshal of the Fourth Army, the drone sent back the final accurate data before it self-destructed.

There were five star beasts in total.

The highest was what the communicator called a D-class mutant 3s star beast.

There were two S-class star beasts, one of which was a C-class mutant and the other was normal.

There were two SS-class star beasts, one was a B-class mutant and the other was normal.

Erya heaved a sigh of relief, "Except for the leading one, the rest are fine." He smacked

his lips for a moment and then said, "That B-level mutant beast is a good teaching material."

Fei Chu was silent for a moment, took the information from Erya, and discussed the degree and scope of the opening of the border barrier with Chi Yao.

Fei Chu: "If they don't speed up, they are predicted to reach the desolate planet where Darya released his spiritual power in three days."

"The movement speed of the star beast colony is also being monitored, and any changes will be reported immediately."

Chi Yao looked at the star map, his finger on the projections of the three stationed planets, "First open the outermost barrier, and move in a unified manner together with the surrounding Fourth Army, so that the star beasts will not fail to break through here and instead attack them."

Chi Yao: "We will observe according to the plan, and then try to drive them away. If driving doesn't work, we will start hunting."

Fei Chu nodded, and began to make arrangements with the intelligence and star map.

Chi Yao asked Erya, "If they fight, the strongest one will definitely be isolated by the barrier. The worst case scenario is that the remaining four will enter the barrier."

Erya: "Then split up the troops. It would be best if we can lead three away. If unfortunately my teaching material is also trapped in the same area with other star beasts, if there are only two star beasts, I think it is better to let my team and Shi Xing go. If there are three star beasts, send someone to chase the remaining one. If all three are together, just kill them directly, so that they don't cooperate and shrink their hands and feet."

In other words, if the B-level mutant SS-level star beast teaching material cannot be isolated and dealt with separately, then Erya would rather not have it and would not take the risk to train Shi Xing.

Chi Yao thought so too, and the two of them hit it off.

After Erya left, Shi Xing looked at Chi Yao with shining eyes and asked curiously, "The barrier that was opened, is it what I thought, the defense barrier of the border?"

Chi Yao: "You look like you are looking forward to it?"

Shi Xing's eyes widened, "Of course I am looking forward to it. I have been introduced to it in textbooks since I was a child. I have never seen the defense barrier of the border opened."

When Shi Xing was at the border, there were not many star beasts in the area managed by Lu Li, not to mention the attack of star beasts of this level, so he had never seen the foundation of the establishment of the border - the deployment of the defense barrier.

Chi Yao smiled: "Want to see it?"

Shi Xing nodded.

Chi Yao pulled out a series of documents from the Elders' Council from the communicator and projected them in front of Shi Xing, urging him, "Then let's go together after we finish the government affairs." He glanced at the time, "It is estimated that the deployment will not be opened until the evening."

Shi Xing took the documents and expected to agree.

The defense barrier is built between planets. When opened, it presents a surface that can intercept all active star beasts and warships. It will not be easily opened unless there are special circumstances.

However, the appearance of a D-class mutant star beast was obviously a special case.

Everyone was busy, and not everyone was there for dinner. Fei Chu and Fu Qing ate in the team, while Er Ya and Ying Geng were discussing the battle formation for the textbook, and then they had dinner in Ying Geng's team. Bi Zhou had a practical class today, and he didn't come back in the woods. Yan Changyue had already gone there with the food.

At the full table, only Chi Yao, Shi Xing, and Xu Jin were left.

With the arrival of the high-level star beast, the atmosphere was a little tense, and Shi Xing's eating speed increased.

Fearing that he had consumed too much recently, Chi Yao and Xu Jin asked him to eat another half bowl after he

finished eating. Shi Xing listened, held the bowl and obediently added rice to finish it.

When hunting outside, all government affairs, unless necessary, were handed over to the palace clerks. Shi Xing and Chi Yao did not have much government affairs on hand.

After a short nap after dinner, Shi Xing was called by Chi Yao, saying that the border defense barrier was about to be opened.

Shi Xing followed to watch.

"What do the textbooks say about borders now?"

Chi Yao asked on the way.

Shi Xing replied, "It is said that the twin galaxies were established when the beast tide of unprecedented scale invaded the galaxy three hundred years ago."

"That's right." Chi Yao confirmed.

"Each galaxy often encounters star beasts and beast tides, but most of them are not as large as the army. There are hundreds of them at a time, which are all large beast tides."

But the beast tide three hundred years ago was not.

That beast tide was led by a particularly powerful king-level mutant star beast.

Their intelligence seems to have evolved, and their attacks are strategic and rhythmic.

When they learned that their number was in the tens of thousands, most of the planets in the galaxy collapsed.

Chi Yao talked about some knowledge points outside the textbooks, "They should have migrated from distant planets. Star beasts do not produce, but only plunder planetary resources. After the resources are exhausted, they leave to find the next one. This is their fixed life pattern."

"They have occupied more than one galaxy, otherwise they would not have grown to that scale."

After the planets at the edge of the binary galaxy were destroyed one after another, they realized that they could not stop this beast tide by fighting alone, so all the planets in the galaxy united to build a border to resist the beast tide.

"The war lasted for nearly a hundred years, and every planet paid a terrible price."

Chi Yao's parents were also seriously injured in the process of attacking the king beast.

Chi Yao looked down and said suddenly, "The planet we are standing on now is one of the first to be plundered in the beast tide."

And most of the borders are built on these lost civilizations.

After a pause, Chi Yao realized something and raised his head, "It's started." Shi Xing

looked up at the sky.

Under the vast sea of ​​stars, a layer of defense barrier that can accommodate several planets slowly unfolded from one side, through planets and fixed satellites, and special transmitting and receiving instruments, like a scroll.

Feeling the violent fluctuation of energy, Shi Xing blinked again, and the magnificent energy membrane refracted colorful illusions, slowly extending from one end of the sky and rushing to the other side of the sky.

This barrier can effectively isolate the sudden attack of star beasts and warships in the first time.

During the beast tide three hundred years ago, it was open all year round and was also the first line of defense of the binary star system.

However, a barrier that can cover several planets is destined to be not too strong, and can only buy buffer time for the army to prepare for war.

But having such a buffer time is also good.

Long-range weapons can be deployed, thereby greatly reducing casualties.

Chi Yao: "We can only open the outermost layer tonight. We will probably have to wait until they arrive to open the inner layer to further isolate the star beasts."

Shi Xing nodded and sighed, "It's really spectacular~"

Chi Yao smiled, stretched out his hand, and Shi Xing shook it back. The two stood side by side without saying a word, watching the defense being fully deployed.

Three days later, the star beast group arrived at the desolate planet as scheduled.

After another half a day, they followed the smell and found the planet where they were stationed.

They drove them away twice, but to no avail.

When all the star beasts gathered outside the defense barrier, a general led a team to disperse the star beasts and prepare for the subsequent one-by-one hunting.

The highest-level beast was surrounded by several unmanned warships, and heavy energy cannons and energy beams were fired one after another, forcing it to separate from the other beasts.

The remaining four beasts were guided and placed in the defense barrier one after another, making it easier for the army to hunt them one by one.

Erya's teaching materials were still behind. What was worse was that the first beast to land was a C-level mutated S-level beast. Its mental power level was not high, and its mutation level made it difficult to deal with.

After discussion, while the other three beasts were still besieged in outer space and clouds, Shi Xing's team took the lead.

Shi Xing released a special barrier to wrap the beast and fix it in the air.

Ying Geng's mecha team followed closely behind, without waiting for the star beast to break through, spiraling from bottom to top, circling the star beast layer by layer, and blocking all its paths while attacking quickly.

In a few dozen seconds, less than a minute, in a very short time, after the mechas dispersed, the star beast in the barrier of Shi Xing was suspended in defeat after several fierce attacks, with all its limbs broken and dying.

Er Ya: "Try it before you let it go."

Er Ya wanted Shi Xing to pass through the barrier and absorb the spiritual power of the S-level star beast. Shi Xing

tried several times and shook his head, "No."

He just couldn't master the method of absorbing spiritual power out of thin air.

Erya looked up at the sky and said quickly, "This one is too low-level. Leave it alone and throw it on the ground."

As soon as she finished speaking, Shi Xing removed the barrier, and the other star beast separated by the warship fell quickly.

Looking at the mutant mental power that exploded several times in the air, Erya brushed her hair and said happily, "The teaching material is here." She

watched the opportunity and called, "Shi Xing."

As she finished speaking, a barrier covered all the soldiers in the low altitude. The besieging warships in the high altitude received an order to disperse in advance, but the star beast crashed directly into the barrier and was smashed into pieces.

It was Shi Xing's composite barrier.

Ying Geng said, "Too close."

Shi Xing pushed his hand outward.

As he moved, the barrier was pushed outward rapidly, and the star beast outside the barrier was also pushed out without any resistance by Shi Xing.

In more than half a year, Shi Xing's growth was also terrifying.

Chi Yao's voice came through the communicator, "The D-class mutant star beast outside the defense barrier can be delayed for about an hour. It will be hunted and killed in an hour. Pay attention to the time."

Looking at the B-class mutant SS-class star beast that stabilized its body in the air, Er Ya rubbed his hands and said happily, "Then let's start with the first defense formation."