Naturally, the humans would not just watch as the Demonic Air Ripping Eyes wreaked havoc in the air.
A lot of airbags were streamlined. They were lighter, and they were more mobile. The attack-type armored airships with more than one hundred machine guns continuously patrolled the air transportation line and launched repeated attacks at the Demonic Air Ripping Eyes.
Other than the cannons that looked like iron hedgehogs on the body of the airship, it was also equipped with dozens of crystal loudspeakers of super high power, which were playing inspiring military songs nonstop to offset the mental attacks of the Demonic Air Ripping Eyes as much as possible.
Sometimes, four or five armored airships surrounded one Demonic Air Ripping Eye. Dozens of crystal loudspeakers were aimed at the Demonic Air Ripping Eye at the same time, and the loud military songs were adjusted to the loudest.
The surge of mind and spirit energy alone was enough to make the Demonic Air Ripping Eye suffer a mental backlash and explode.
Besides, as the transport airships risked their lives to rush to Burning Island, aside from the heavy artillery bases, a large number of anti-aircraft machine guns and anti-aircraft cannons were also assembled and deployed.
Accompanied by a deafening roar, it was as if the world had been turned upside down. Blazing torrential rain sprayed from the ground to the sky, riddling the Air Splitting Demonic Eyes with thousands of holes. Puff, puff, puff.
Of course, the monster civilization did not just have Demonic Air Ripping Eyes as their only aerial force.
A large number of falcon-type and griffin-type flying monsters flew more than one thousand meters above the clouds. Then, they swooped down along their attack trajectories that were practically perpendicular to the ground. Like penetrators, they crashed into the human's heavy artillery bases, anti-aircraft machine gun bases, ammunition depots, battlefield hospitals, and the gathering points in the trenches.
The kinetic energy alone was enough to create shockwaves and huge pits. Besides, there were lice, fleas, and other insect-type monsters hiding in their feathers. Their bodily fluids were poisonous and corrosive.
The aerial gunships could not stop these lightning-fast ambushers.
Even if they were torn to shreds by the anti-aircraft machine guns, their highly contaminated carcasses and insects with fatal germs would fall on the humans' heads like rain.
If the monster horde only referred to thousands of Demonic Halberd Pigs, Iron-armored Rhinoceroses, and other idiots who were led by Hell Beasts like Tyrant Mammoths to charge at the humans' steel defense lines in a simple and violent manner, then the humans could hide behind the minefields, automatic machine gun towers, electromagnetic towers, machine guns, and heavy artillery bases.
Then, the humans could completely hide behind the minefields, automatic machine gun turrets, electromagnetic towers, machine guns, and heavy cannons to easily harvest them.
Even if there were unparalleled fierce beasts with thick skin and flesh that could smash through the iron walls of the human race, they would be exhausted and covered in wounds by the time they reached the human race. They would definitely not be a match for the human experts.
But the greatest difference between monster civilization and monsters was also the most terrifying aspect. It was not how much the monsters' offensive and defensive attributes had increased on paper, how much tougher they became, or how sharp their claws were. Instead, it was how the monsters had learned how to set up formations and how to work together with other types of soldiers.
For a super large-scale beast horde like this, before launching a suicidal charge, they would first send aerial forces to harass the humans continuously, then use the tactic of dropping insects and germs from the sky, making it very difficult for the humans.
At that moment, a large number of Heaven Realm superhumans, including Blade Dancer Gu Jianbo and Griffin Li Yingzi, were stationed on Burning Island. In fact, there were even Deity Realm superhumans who had the right to lead a major course in the alliance of the five universities.
They could kill a Hell Beast with just one slash.
But it was impossible for them to instantly get rid of the thousands of fleas that fell from the sky.
And these fleas were born in a unique environment that was rich in spirit energy in the Other World. Their evolution speed was incredibly fast, and they had also gone through the genetic screening and biochemical modifications of the monster civilization. They could be said to be monsters, but they were completely different from their relatives on Earth.
As long as a monster-level flea jumped into a human's clothes and started gnawing on their flesh, it would bring them great pain.
Normal soldiers who did not have spirit energy protecting their bodies would soon start foaming at the mouth, their muscles would twitch, and their nerves would be poisoned. They would lose their fighting strength for the time being.
Even if the humans wore airtight chemical protective suits made of nanomaterials, the vermin could still find an opening. In fact, they could even use acid and sharp mouthparts to create holes in the chemical protective suits.
To fight against the insect-type monsters that descended from the sky, the humans had to carry extra large, high-density insecticides with them. They were prepared to spray sticky bubbles on themselves and their comrades at any moment.
Because of it, the time needed to dig trenches, deploy heavy artillery, and transport ammunition was greatly delayed.
Hence, the intervals between the heavy artillery's roars grew longer, and the roars became sparser. They could not cover the depths of the forest where the monster horde was gathering perfectly.
However, compared to the real threat at the moment, the harassment from the Demonic Air Ripping Eyes, falcon-type monsters, and insect-type monsters was nothing.
To the humans who were racing against time to build their fortifications, the most troublesome threat did not come from the sky. Instead, it came from right under their noses or even hiding around them.
It was the undead.
The activity of the bacteria and viruses in the Other World was one hundred times higher than on Earth.
The instability of carbon-based life forms was also one hundred times higher.
Even if they were cut into pieces, when the bacteria, viruses, spores, and all sorts of parasites worked together, there was a certain chance that they would turn into a completely different life form.
This was especially so after the monster civilization extracted the essence of the Blood Flower and developed the new zombie virus. The probability of the undead turning into the undead and how brutal they were after they turned into became several times higher.
During the repeated fights over the past seventy-two hours, the humans left behind nearly one thousand corpses on Burning Island.
The number of monster carcasses far surpassed the number of human carcasses.
Hundreds of thousands of carcasses were scattered on the top of the rock and around Burning Island. They were connected to the ground and were on the slope that was relatively flat. Then, they were buried under the dust stirred up by the explosions. They were one with the ground, so it was hard to tell them apart.
Due to the invasion of the microorganisms in the Other World, some of the carcasses quickly rotted and released a miasma that was as thick as ink. It was like a yellowish-brown and dark green fog that blocked the humans' vision.
A large number of carcasses swelled up into bulging balloons. In the end, they exploded with a bang, and the liquid that contained fatal bacteria and microorganisms gushed out hundreds of meters into the humans' trenches and fortifications.
Of course, there were also clusters of red tentacles that were as flexible as seaweed that stretched out from the depths of the thousands of carcasses. They bound the torn carcasses, connected them, and fused them together to turn into deformed, ugly, twisted, and mutated undead. They stood up crookedly and let out shrill howls before they pounced on the humans' positions.
To harvest the valuable materials contained in the monster carcasses and get rid of the hidden threat of the undead, the humans sent a lot of manpower to clean up the battlefield.
The superhumans held sabers and served as guards by the side. The harvesters dissected the carcasses at the fastest speed possible. The Red Dragon Army soldiers carried liquid nitrogen spray cans and flamethrowers on their shoulders to purify every inch of the ground.
The bad news was that there were a lot of undead, and there was no pattern to how they appeared, where they appeared, and how they did it.
No one knew just what the carcasses that were forcefully fused together by the Blood Flowers would turn into, what attack methods they would use, and how they had to kill them before they could be considered to have completely killed them.
Hence, each time they killed an undead, they had to spend more time, ammunition, and energy compared to killing normal monsters.
The good news was that the humans who died on Burning Island were all true warriors. When they sacrificed themselves, their minds were still fixed on the moment they killed their enemies and protected their homes.
Even if these warriors were infected by the zombie virus and Blood Flower spores and turned into zombies, it was still easy for them to remember their identities and missions when their comrades called out to them and the loud military songs.
Hence, such a scene could often be seen on the battlefield.
The undead with ferocious faces, three heads, six arms, and blood-red tattoos tore through the dark green miasma. They howled and pounced on the humans who were busy harvesting.
But the first to block their path were not the superhumans or the Red Dragon Army, but the ferocious-faced zombies who had also crawled out of the mountains of corpses.
The human emblems these zombies wore had long since been torn off.
They had also long since lost their breathing, heartbeat, and even 99% of their thoughts and memories.
However, the remaining 1% of their thoughts and memories were like a shining lighthouse in the middle of a raging storm, pointing out the final direction for them.
The zombies' riddled chests let out strange sounds, and they gathered together to form a crooked rhythm that did not sound like a tune.
They sang a war song that only they understood and pounced on the undead. Every piece of their flesh turned into metal teeth that tore at the undead. They rolled together and fell off a cliff that was hundreds of meters tall. Their bodies were crushed, and they used their flesh and blood to leave an indelible mark that belonged solely to Earthlings in their brand new home.
Even though the main forces of both sides had yet to clash against each other head-on.
Devastating and tragic small-scale battles were happening in the sky, on the ground, and on all the battlefronts.
To the east of Burning Island was a steep slope that led straight to the ground.
Even though it was steep by the standards of Earth, to the humans and monsters whose mobility had increased by leaps and bounds, it was a broad road. At the very least, it was much better than the straight cliffs that surrounded most of Burning Island.
Over the past seventy-two hours, at least ten waves of monsters had tried to climb up Burning Island through this slope.
In the end, they left behind thousands of corpses.
The slope became an important area for humans to clean up the battlefield and purify the undead.
They had to race against time and clear away all the monster carcasses before the monster horde attacked. They had to dig trenches up and down the slope, set up anti-monster mines, set up high-voltage electric nets, and electromagnetic turrets. They also had to set up an anti-aircraft machine gun base that was shaped like a semicircle at the top of the cliff, which was directly opposite the slope.
When it was necessary, the anti-aircraft machine guns could sweep horizontally and use peerless firepower to push down the vicious beasts that had rushed up the steep slope.
The difficult task of cleaning up the battlefield was given to Agricultural University's martial arts course, which had risen to fame over the past two years. It was famous for the Ultimate Style and Beast Soul Style and could practically fight against Dragon City University's martial arts course.
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