314: 'boom'

On the 10th day, Xu Bai arrived at the monitoring room once again.

Xu Bai did not come to the monitoring room every day; for a period in between, Xu Bai was at the Research Institute researching new weapons.

Now the alien beasts were already at the foot of the city wall, which meant it was a critical moment; it was impossible to let the alien beasts continue to advance.

Many low-grade alien beasts used the long-necked high-grade alien beasts as ladders, coiling around their necks, trying to climb up the city wall. At the same time, flying alien beasts were not to be outdone, hovering by the city wall, trying to rush inside, while holding some attacking items in their hands, causing things to fall onto the city wall from time to time.

It had snowed every night for the past few days, yet now, not a trace of snow could be seen on the city wall; there were only people, blood, and the things that had fallen.

Xu Bai stared fixedly at the screen, forcing himself not to flinch.

The soldiers on the city wall could still hold their positions and attack the alien beasts even after things were thrown down beside them. He was just watching from the monitoring room, so what was there to be afraid of? He wanted to turn this fear into anger toward the alien beasts, and then, through this anger, come up with weapon cards to deal with them.

This war would surely claim more lives. Xu Bai didn't have time to grieve; in order to have fewer deaths in the next war, he needed to work hard to find ways to research new cards.

...

Just when Xu Bai felt that humanity wouldn't make it like this and might have the city wall breached by the alien beasts...

He immediately discovered the appearance of drones carrying Star Energy Stone Bombs.

Xu Bai was very familiar with this bomb; after all, he had been frantically making them for some time recently.

Looking at the screen, Xu Bai counted silently in his heart; it looked like about 20 of these drones had set off.

These 20 drones were the most advanced type. Although their style looked the same as other drones, as soon as they started moving, they could be distinguished from the others.

First, their reactions were more flexible, capable of performing various complex flight maneuvers in the air to evade. This flexible reaction also required the operator to have strong hands-on ability and an active mind. These two requirements alone had already screened out a large number of people, so not many could control them.

Secondly, they were equipped with devices to scan the surrounding situation, which made it easier to understand the status of nearby alien beasts. After all, they needed to fly far away, and just observing with video was too vague; scanning equipment was more precise.

It should be known that the disadvantage of the Star Energy Stone Bomb was that it required reaction time, and its attack range was relatively large, so it could not be detonated nearby; it had to be taken far away to be detonated.

...

This batch of drones set off. Xu Bai's gaze followed the flight path of one drone, wanting to see where it was flying and whether it would be intercepted by alien beasts halfway. Out of the corner of his eye, he saw the people attacking nearby; while attacking, they freed up a hand to put on the U-shaped ear muffs they had prepared earlier. After putting on the ear muffs, the sound outside became much, much quieter.

The drones looked like fish swimming into the water, very leisurely and carefree.

The alien beasts seemed to know that the things on the drones were a threat to them and wanted to attack the drones. He saw one rush toward a drone, but the drone quickly dodged elsewhere.

These alien beasts flapped a few times and didn't touch the drones. The drones disappeared before their eyes, and at the same time, other nearby drones provided cover for these drones, so the alien beasts couldn't pay attention to the drones they had seen before.

To the alien beasts, these drones were like small mosquitoes; although very weak, they disappeared in the blink of an eye.

Soon, these twenty drones disappeared without a trace.

Just as Xu Bai was feeling disappointed, someone pushed other screens over. What was displayed on them was the scene from the previously vanished drones, and at the same time, a countdown was displayed on the side.

Looking at the countdown, he immediately thought that this must be the countdown to the start of the explosion.

Thump, thump.

For some reason, everyone's hearts seemed to be beating wildly at the same frequency, and Xu Bai also felt a bit dry in his mouth.

3, 2, ... 1!

"Boom"

A violent explosion seemed to ring out in everyone's hearts. They only saw a flash of sparks fill the screen before it went black.

The people in the monitoring room couldn't hear the sound of this explosion, but the people on the battlefield all heard it.

After all, this was the sound of 20 Star Energy Stone Bombs exploding at once. Even though the soldiers wore ear muffs that greatly reduced the sound, they could still hear it clearly.

After this huge noise, for some reason, the alien beasts seemed to have petrified, freezing for a period of time. At this moment, they couldn't speak, and drones carrying ordinary bombs flew toward the alien beasts.

However, something unknown triggered the taut nerves of the alien beasts, causing them to let out shrill screams, and then they stumbled around like they were drunk. The flying alien beasts in the sky also all fell to the ground.

The soldiers were a bit shocked; after all, the explosion range did not reach the front lines. What was wrong with the alien beasts here?

At this moment, they remembered what the laboratory personnel who gave them the ear muffs had said.

They said that the strong sound pressure generated by the explosion would impact the eardrum and inner ear hair cells, potentially causing temporary hearing loss, accompanied by tinnitus.

If it exceeded the tolerance range, it could also lead to eardrum rupture and perforation, causing symptoms such as ear pain, ear canal bleeding, and significant hearing loss, as well as dizziness and nausea.

Looking at the alien beasts below, wasn't it exactly as they had said?

Fortunately, fortunately, they were wearing ear muffs; otherwise, they would be like the alien beasts below.

Having experienced many wars, they knew that this was the perfect time to attack. They gripped their firearms tightly and attacked the alien beasts below. The drone squad also controlled their drones, following the energy intensity displayed on the scanners, flying toward areas with higher energy, and then exploding.

The alien beasts below were killed and injured in droves. Just as the soldiers were getting into the swing of things, one after another, alien beast cries came from afar. They originally thought the alien beasts would continue to attack, but unexpectedly, the alien beasts in front that had recovered their spirits and hadn't been killed began to retreat little by little.

The people in the monitoring room saw the alien beasts rushing backward like a receding tide, and smiles appeared on everyone's faces.

This active attack by the alien beasts—the opponent had admitted defeat.

The wave of bombs just now had exploded right among the high-grade alien beasts and Super-High-Grade Alien Beast. It could be said that the main force of the alien beasts had been wiped out by more than half in an instant.

This was also the reason why they had waited until this moment to use the Star Energy Stone Bombs. Using them at this time achieved the best effect; otherwise, if they had used them at the beginning, those Super-High-Grade Alien Beast would have been on guard.

The continuous advance of the alien beasts over these few days had made the opponent careless, and then they followed along, advancing into the flight range of the drones.

It could be said that the timing was just right.