Isekai Adventure in the Dimensional Cube

"Fairies’... original sin?"

Everyone’s breath collectively halted.

"What do you mean?" Da Vinci’s expression turned serious as she pressed Reiger: "Why do the fairies bear original sin?"

Reiger did not answer the question immediately; instead, he observed everyone present.

Among those present, some looked puzzled, some were utterly confused, some had solemn expressions, while others unconsciously showed a hint of unease and tension in their eyes.

Altoria was among the latter.

As she met Reiger’s gaze, she had a faint feeling that she might learn something very important next.

After all, since the first day they met, this man had always exhibited an all-knowing demeanor in inexplicable ways.

From that time, Altoria knew this man definitely knew a lot.

And now, it seemed that he was finally going to reveal Britain’s biggest secret.

The fact is, that’s exactly what’s happening.

Reiger knew that at this moment, neither Altoria nor the group from Chaldea had yet grasped the deepest secrets of this Lostbelt.

The Lostbelt is a world that diverges from the Proper Human History, a "no future" history pruned away during the development of human history.

So, when did this British Lostbelt start diverging from the Proper Human History, resulting in a different historical development and being pruned as a Lostbelt?

Da Vinci might have pondered this question for a long time, but even a genius like her had not yet found the answer.

Given this... 𝐟𝕣𝗲𝕖𝕨𝗲𝐛𝗻𝗼𝐯𝗲𝚕.𝗰𝚘𝐦

"There’s no need to keep this hidden any longer."

Reiger decided to reveal the secrets of this Lostbelt to Altoria and Chaldea before the full-scale battle with Morgan.

So, he looked at Da Vinci.

"Chaldea should already know that there has been a prehistoric civilization in Earth’s history, right?"

In response to Reiger’s counter-question, Da Vinci, though somewhat puzzled, answered honestly.

"Yes, not just Chaldea, but many factions and organizations in the magecraft world have confirmed the existence of prehistoric civilizations."

Seeing Altoria, Pasival, Habettelot, Gareth, and others look confused, Da Vinci began to explain.

"The so-called prehistoric civilization is a super ancient civilization that existed before human civilization appeared in Proper Human History."

"In Proper Human History, the development of human civilization spans only a few thousand years, but the origin of the human species can be traced back tens of thousands of years, during which there’s a long gap."

"That’s because, about fourteen thousand years ago, a prehistoric civilization in Proper Human History was destroyed."

This is the situation of this world.

In other words, in this world, about fourteen thousand years ago, there was a specially advanced prehistoric civilization among humans.

Just as the Akasha continent had an ancient magic civilization eleven thousand years ago.

And the similar ending for both was that they were eventually destroyed due to the rampage of an invincible and mighty external enemy.

The ancient magic civilization of the Akasha continent was destroyed by the King who led magical creatures.

And this world’s prehistoric civilization was destroyed by an extraterrestrial enemy.

"The Vanguard of the Wandering Star, the white giant—Sapharlu."

Da Vinci’s voice wasn’t loud, but it resonated clearly in everyone’s ears.

"This is an alien invader from outer space that attacked Earth."

This white giant from beyond the stars destroyed the prehistoric civilization.

"It not only destroyed the civilization but also swept away the vast majority of mythological systems, almost turning the planet’s surface into nothingness."

Da Vinci revealed this historical fact to the natives of this Lostbelt.

"So Proper Human History underwent such dangers?"

Gareth was strongly shaken.

"Nothingness..."

Habettelot also frowned deeply, lost in thought.

"What happened afterward?" Pasival asked with empathy, as if feeling the concern: "How were the land and life of Proper Human History ultimately preserved?"

The one answering this was not Da Vinci, but Matthew.

"Someone defeated the Vanguard of the Wandering Star and saved the world." Matthew said solemnly: "It is said that it was the first Holy Sword Master who received a divine weapon from the fairies of the Inner Sea of the Star."

"This holy sword was forged in the Inner Sea of the Star to counter the threat to the planet."

"The one who wielded that holy sword defeated the white giant, allowing human history to continue without being completely annihilated fourteen thousand years ago."

At these words, Altoria had an extremely strong reaction.

"Fairies from the Inner Sea of the Star... forged the holy sword?"

Altoria unconsciously tightened her grip on the chosen staff.

Everyone present also looked towards Altoria.

After all, she too was a fairy from the Inner Sea of the Star.

"Why bring this up suddenly?"

At this moment, Fujimaru Ritsuka spoke up somewhat nervously, asking this question.

"Could it be..."

Da Vinci seemed to realize something, her expression changing.

"That’s correct." Reiger said coldly, addressing everyone present: "The reason this Lostbelt’s history diverges from Proper Human History is because it started from that time."