Technological advancement begins with devouring.

"The efficiency in eliminating the beast horde was even faster than expected. Jarvis, well done."

On the city wall, Jiang Chen watched the endless stream of beasts approaching and being quickly annihilated in the distance, and couldn't help but let out a sigh of admiration.

After several hours of fierce fighting, the area between one thousand and five thousand meters outside the city was covered with the corpses of monsters, piled up to form a natural barrier.

Weak monsters will immediately lose speed upon entering this area, becoming easy targets for the 'machine gunners'.

Further out, there were countless bomb craters and shredded flesh, all created by rocket bombardment.

More than 100,000 rockets swept the ground repeatedly, eliminating hundreds of thousands of monsters.

However, even now, more than 50,000 monsters remain in the beast tide.

At this time, the rockets brought from the Jiangnan base city had been completely exhausted.

The mechs have enough bullets, but with 50,000 monsters and over 100 mechs, even if they only need to defend one direction, Jiang Chen can't guarantee that they can hold out.

If there are too many beast general-level and lord-level monsters, some problems might arise.

"Perhaps I'll still have to take action myself. But it seems there aren't any planetary-level monsters left." A thought flashed through Jiang Chen's mind.

In the previous battles, Jiang Chen alone was able to identify and confirm that no fewer than thirty monsters had reached the Lord level. There are probably many more that died in the chaos of war without being noticed.

However, judging from the current movements of the horde, there are at least a few lord-level monsters driving them from the rear. Otherwise, with such a huge loss, even a fearless horde of monsters would have collapsed long ago.

“Not all Lord-level monsters have distinct, identifiable features. In many monster groups, it’s difficult to distinguish between different levels just by appearance, and we can’t confirm how many high-level monsters still exist.” Jarvis’s voice rang out: “However, with only tens of thousands of monsters left, the mech team is fully confident in holding the line.”

“Then it’s up to you…” Jiang Chen was saying when his expression suddenly changed.

The earth suddenly trembled violently, causing cracks to appear in the base's walls and many buildings to collapse inside.

Fortunately, the city wall was made of an extremely strong alloy; otherwise, it would probably have collapsed during this earthquake.

Some unlucky Boxer mechs crashed below the city wall but quickly climbed back up.

Only a few severely damaged units remain lying in place, waiting for SCV repairs.

"A very strong Force fluctuation has been detected. This is not an ordinary earthquake; it's an attack by a King-level Earth-type monster!" Jarvis quickly made a judgment based on the data from the monitoring instruments: "The opponent is underground, 1200 meters to the left front! At a depth of about 30 meters! Judging from the intensity of the Force fluctuation, it is estimated to be between Planetary Second and Planetary Third Rank!"

"There really is a King-level monster? It's been hiding really well, only appearing after we've almost finished fighting it." Jiang Chen stood up, ready to make his move: "Jarvis, help me pinpoint its location, I'll go take care of this guy."

“Master, could we hand this monster over to the mech team to deal with?” Jarvis suggested. “A monster around planetary level three is perfect for testing the mech team’s combat limits.”

The 'Sniper' and 'Firebat' have enough attack power to deal with planetary-level monsters.

Although it can only deal with low-level planetary monsters and cannot break through the defenses of Emperor-level monsters, it is still possible to hunt some King-level monsters.

However, these are ultimately just calculations based on the performance parameters of mechs and weapons; no one has verified whether they can be achieved in actual combat.

This monster is a perfect opportunity.

Jiang Chen was somewhat tempted, but also a little worried: "To deal with burrowing monsters, it would be difficult for both 'Snipers' and 'Firebats' to directly attack them, right? And if we send out a large number of mechs to besiege a King-level monster, what will happen to the remaining horde?"

Jarvis quickly explained his plan: "Sending just one small team will not significantly impact the base's defenses. As for burrowing... we have six 'high-pressure stun grenades' among our weapons, which should be enough to force the target out from underground."

Jiang Chen hesitated for only a moment before nodding and saying, "Then I'll leave it to you. If there's any trouble, I'll step in."

Whether it's a beast tide or a monster estimated to be around planetary level three, Jiang Chen is confident he can handle it, so he's not worried about any mishaps.

Taking this opportunity to test the limits of the mech team is also a good choice.

During the short time the two were talking, the unknown earth-type planetary monster launched two more attacks, causing a considerable earthquake.

Although it did not cause too much damage, the attacks of many mechs were affected, and the efficiency of suppressing the beast tide was reduced instantly, allowing the beast tide to advance a lot. The beast horde at the forefront was less than a kilometer away from the city wall.

However, at this moment, a mech squad consisting of twelve [Boxers] had already quickly completed their transformation, rushed out of the base, and headed towards the location where the planetary monster was hiding.

This is a non-standard squad, with only one 'machine gunner,' far below the usual standard.

Instead, the number of 'snipers' has increased to six, plus two 'firebats', two 'guardians', and one 'repairman'.

As the mech squad jumped off the city wall, a launcher with a cannon barrel more than ten meters long was sent up the wall, along with six slender munitions.

A "Boxer" dropped his rifle, picked up a missile launcher, loaded ammunition with the help of an SCV, took a slight aim, and quickly pressed the launch button.

A burst of scorching flame shot out, and the rocket, trailing a long plume of fire, flew above the herd of beasts, exploding violently at a height of more than twenty meters above the ground.

There was no strong impact or scattered shrapnel; only a loud bang that quickly spread outwards.

Sonic weapons are not known for their lethality, but their penetrating power is astonishing, and they can almost ignore most types of cover, including dirt and rocks.

Deep underground, a pangolin over a hundred meters long, radiating an earthy yellow light, was gathering its primal force, preparing to launch a new attack.

Suddenly, a terrifying sound wave came from above. The high-frequency vibration made the pangolin-like monster dizzy, as if its head was about to explode, and it almost lost control of its body.

Before it could even try to use the Force to dispel the dizziness within its body, a loud boom followed, and the second wave of attacks arrived immediately.