In that era when technology was just beginning, gunpowder had just been applied to war, and mainstream weapons were still bows and arrows and long spears. Giant beasts standing thirty to forty meters tall were a dimensional attack on humanity at the time.

In that era, the humans of this world were on the brink of extinction. The giant beasts destroyed their pre-existing order and economy, causing nations worldwide to collapse. Giant beasts rampaged, and humans began to hide in underground burrows like mice, hoping to survive in this manner.

However, the giant beasts increasingly awakened the ability to sense heat sources and heartbeats, easily discovering humans hiding five meters underground and hunting them down one by one.

Although there were humans who killed giant beasts through traps, catapults, muskets, and spears, these small-scale victories could not conceal the overall defeat of the human defenses.

At that time, when the people of this world completely lost their ability to resist, a man in a white robe suddenly appeared, like sunlight piercing through the night, raising his torch high and bringing a new strength to this world.

It was called "Magic."

And was the predecessor of "Spiritual Energy" in the modern world.

The old mage led the survivors to build city-states on the ruins. Through magic, they could quickly build gigantic walls nearly a hundred meters high to fend off the giant beasts.

He taught more and more people various magic, and then when a city-state had enough power to withstand giant beasts, he would move on to another place, gather more survivors, and build city-states again.

This is the historical origin of this world, centered around cities.

After countless large and small city-states were established worldwide, the old mage disappeared. Some said he had died of old age, while others said he had gone elsewhere. Eventually, the original city-state system of the world was thus established.

Survivors also possessed this new strength—magic— to fight against the giant beasts. In this way, another thousand years passed, and both human magic and technology further developed. Around the original city-states established by the Great Sage, they opened up more city-states, at one point reaching over 800 city-states.

However, as humans progressed, so did the giant beasts. A thousand years ago, giant beasts at most were thirty to forty meters tall. The strongest was estimated to barely reach Tier Three, so some Tier Two mages were enough to protect a city-state.

But now, the strongest of the giant beasts are over eighty meters tall, reaching even the pinnacle of Tier Four. Meanwhile, among humans, even the strongest spiritual ability users are only at the peak of Tier Three. Facing increasingly strong giant beasts and even stronger superbeasts, humans can only rely on technological advancement and magical assistance to barely fend off the giant beasts.

The progress of humanity lags behind the speed of the giant beasts' evolution...

Many people have pessimistically thought that humanity will once again find itself in the same situation as a thousand years ago, becoming mere trembling fodder under the feet of giant beasts.

Seeing this, Xue Dili gradually understood everything.

Why the world's human leadership went almost fanatical in their research after obtaining the Giant Beast Serum.

Even though many speculated that the Giant Beast Serum might have issues, any superbeast transformed by the serum uniformly harbored extreme hatred toward humans.

Because the speed of human progress has long been unable to keep up with the advancement of giant beasts.

In a thousand years, humans in this world have advanced from muskets to atomic bombs. Magic, from its highest at Tier Two mages, has advanced to now the highest at near Tier Three, reaching the cusp of Tier Four.

However, even before the emergence of superbeasts, the most powerful existence among the giant beasts was already Tier Four.

And these are only the giant beasts humans can observe. In unexplored areas and the oceans, could there be even stronger giant beasts? Humans do not know.

But even Tier Four giant beasts have already made humanity run ragged.

Moreover, technology and magic seem to have hit a bottleneck. Humans cannot make a breakthrough in a short period, while the giant beasts grow stronger each day.

At this pace, humanity faces a slow death. There will inevitably come a day when humans can no longer keep up with the pace of the giant beasts' evolution, and then they will completely become their food.

Therefore, when the Giant Beast Serum is presented openly, humanity cannot just give it up.

This is the difference between a slow death and euthanasia.

Abandon the Giant Beast Serum and face slow death, or research the serum: even if humanity fails, it can be considered a painless end.

It seems that the invaders providing the Giant Beast Serum have entirely grasped the death knell of this world's humanity...

They used the mindset of this world's humans to complete this scheme, not only making humanity exhausted by the external threat of giant beasts but also causing massive internal chaos with the outbreak of superbeast conflicts, pushing the evolution of the world's giant beasts to new heights.

Zero-numbered Giant Beast is already a Tier Four pinnacle monster.

But such superbeasts, this world presently has seven of them, and the number will keep growing.

And those invaders seem confident that after this world's civilization perishes, they can disregard the giant beasts and superbeasts on this planet.

No, perhaps the superbeasts and giant beasts of this world are also their spoils, just as Xue Dili once envisioned: control the superbeasts and giant beasts, then sell them as controllable products for immense profit.

And this planet will completely become a monster farm, where those invaders raise and sell them like cattle and sheep.

Even if the Interstellar Corps comes, they might only find that this planet's civilization was wiped out by superbeasts, and the superbeasts are native species. New alien colonizers seeing the wild superbeasts of this world may just raise them here.

The Interstellar Corps will likely only record and report it, ultimately only becoming a document stored in the archives.

And this civilization was thoroughly buried in the river of history.

...

Xue Dili finished reading the brief history of this world. Combined with the intelligence he had obtained, this was all he could think of.

At the same time, his fists were clenched tightly.

Truly, what a well-laid plan.

Perfectly deceived the Interstellar Corps, and perhaps even fooled the planet's consciousness, making it believe this was merely an internal war within its own realm.

Although they were enemies, he couldn't help but admire the other side's cunning.

It was the first time he encountered someone who used strategy to destroy a world.

Unlike the Witch Demon King who crushed with legions, unlike Zeus with that shocking intelligence of manipulating others, and not like the Shabu Insect Race, a mobile catastrophe.

But rather an invader using an open, top-tier strategy to destroy the world.

"Then let's see if your planning is more outstanding, or if my layout is more perfect," Xue Dili looked toward the sky of this world, where it was slightly dark, and thick clouds gathered.

He seemed to stare at the opponent behind the scenes, issuing a challenge across the distance.

He had one major advantage: the mastermind couldn't act openly, but he could.

...

"It's going to rain," the young lady in the trio looked out at the clouds and said.

Meanwhile, the spirited youth in the three-person team was sprawled on the sofa, having drunk half a large bucket of water, unsure if it was water poisoning, while the gloomy lad awkwardly ate snacks.

Wu Li thought about how these two would be her junior disciples for life (in her self-perception), and felt that she, the senior sister, truly worried herself to bits.

After today's training, they clarified their ages, then sorted into senior sister, second senior brother, and little junior brother.

In the young lady's view, one enthusiastic fool always exhausted himself, and a gloomy brat, while she, as the beautiful young lady, had to be both senior and a maternal figure, training while ensuring these two guys didn't accidentally faint.

She was actually only fourteen years old, just a few months older than them.

Their teacher was the Monarch, with many tasks, unable to look after the three every moment, so it was only she, the senior sister, who had the toughest job.

She also wished for a cold and handsome senior brother in her team, leaning on him as a Little Princess, but it turned out she ended up as the senior sister...

Taking care of two silly junior brothers.

"Silly Star, and Gloomy Lad, we should hurry up and pack the teacher's things. Don't let them get wet in the rain. You don't want to provoke the teacher's anger, do you?" The young lady stood with her arms akimbo, like a senior sister chastising her junior brothers.

"Mission guaranteed!" Cloud Star instantly stood up; he had no objections to this senior sister, primarily because she was older than him, and secondly, this afternoon, he fainted from overusing his water vapor control during training, and it was his senior sister who carried him indoors and gave him water.

"Okay, senior sister..." Gloomy Lad blushed for some reason, immediately following Cloud Star, who put an arm around his shoulder as they left jokingly to pack things.

Wu Li glanced at Gloomy Lad's expression, her mouth twitching.

Girls this age tend to mature faster than boys. She seemed to realize this guy might like her, not because she's conceited, but because except for not confessing directly, he practically had "I like senior sister" written on his face.

In contrast, Silly Star was carefree, more of that in-between sibling-like relationship.

It's a headache, thinking about how to reject him smoothly without hurting his pride.

She liked cool and handsome male gods, not this timid Gloomy Lad.

Just when they finished tidying up outside, thunder rolled, and torrential rain poured down.

Xue Dili happened to come out after reading the data, still maintaining that white hair and sunglasses look.

"Hmm? You guys actually packed things for me voluntarily?" Xue Dili looked at the sensible trio, truly unexpected that they had such awareness.

At his age, he probably wouldn't have thought of it.

"It's nothing, teacher, it's what we should do," Wu Li immediately said.

"Oh, considerate of you, it's raining heavily, I'll drive you home," Xue Dili took out the car keys.

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