With Morgan's death, there was little she could know about what happened afterward.
The only thing she could be certain of was that Guinevere would eventually unify Britain, establish the British Empire, and posthumously honor her as the first Queen of Britain.
As for what happened beyond that, she could only learn of it after that worldline had been pruned, everything flowed back to the origin, and she could observe the events through the simulator's epilogue.
The system told her that in that pruned anomaly worldline, because Guinevere regained control over Britain, the mysticism that should have faded in this era continued along with the resurgence of the British Empire.
This became the turning point where human history began to stagnate.
Over the following centuries, as Britain increasingly interacted with other European countries—or the world at large—frictions naturally arose, eventually escalating into wars.
Yet, though these wars came at the behest of other nations, they would not end simply because those nations wished them to.
It was as if some forbidden switch had been activated. From that point on, the British Empire brazenly declared war on every European nation, seeking a unified campaign to conquer them all.
It might have sounded like nothing more than an arrogant proclamation, similar to the laughable declarations of war issued by some doomed dynasty in later ages. Naturally, the European nations did not take it seriously and began instead to discuss how they might divide the spoils of victory.
Then appeared a king who left all nations powerless.
He commanded armies armed with the magic of the Age of Gods, harnessed the lingering mysticism, bound his subjects with curses, infused his forces with illusions, and led the legendary knights bearing holy swords to strike Europe with overwhelming power.
Countless nobles, heroes, or ancient mystic families hidden in history united, exhausting every means to resist him and his forces—but all fell powerless before his terrifying and grotesque methods.
In an age when technology had yet to develop and mysticism had long faded, no one could stop his legions. One by one, countries were crushed and conquered, their lands absorbed into the British Empire.
Spain, France, the Rhine, Prussia, Italy... within just ten years, almost every nation on the European continent was swept by Britain. And his march did not stop; he advanced into Africa and Asia. By the time the next emperor took over decades later, Britain's territory had surpassed even the peak of Rome.
The ancient families of the conquered lands were uprooted and exterminated, and all imperial power centralized in one ruler. The nobles feared this sole dictator, calling him—the Vicious Tyrant.
The mysticism that should have faded from that island centuries ago was revived with the expansion of the British Empire. With the empire's growth, new religions spread across Europe—more people began worshipping the deep sea, venerating a mysterious deity named Cthulhu sleeping in the ocean. In this religion, the British emperor was established as a god walking among men, much like Jesus to God in ancient legends.
Legend held that the emperor of the British Empire wielded unparalleled power, capable of summoning tsunamis, calling storms, annihilating entire armies in an instant, and destroying cities with a mere snap of his fingers. This incredible power, however, was only passed down within the Le Fay royal family; only the head of the family could wield it and inherit the throne.
Another tale suggested that each British emperor was, in fact, the same person. On the day of succession, regardless of their former kindness or virtue, they would become a cold and merciless tyrant, enacting policies identical to their predecessors.
Some speculated that a curse lingered in the Le Fay bloodline—a centuries-old immortal evil, forever stealing the bodies of its descendants, repeatedly resurrecting, and eternally ruling the kingdom.
Meanwhile, forbidden beliefs, rituals, madness, and fear spread across the land. Strange creatures, which should never have seen the sunlight, roamed openly among humans. Their worshippers began to exhibit bizarre mutations, their minds increasingly twisted and deranged. Civilization and technology drifted further from humanity, but madness and ritual drew ever closer.
Why did this world become like this?
Understanding the history of this empire and the shadow spreading across the land, Morgan felt joy that Guinevere fulfilled her wish, yet she was also bewildered by the state of this nation.
The system's answer: after realizing the truth behind the curse she left, Guinevere's mental state grew increasingly unstable and extreme—in simpler terms—he had gone mad.
Amid this unstoppable, infinite life filled with madness, Guinevere took the last wish Morgan left him as his sole obsession.
Everything he did was to sustain this nation called Britain, to keep it alive forever.
Yet, as the Age of Gods waned, the kingdom's fall seemed inevitable; it was the tide of the era, not something Guinevere alone could prevent.
If the Age of Gods had not faded, human history would have been disrupted, even halted. In that case, this worldline would soon have been pruned by human order.
Morgan understood this. She knew the fading of the Age of Gods was inevitable. As the master of the island born from Britain's mysticism, her existence was to prevent this—but even with her immense power, she could not succeed. Through countless simulations, she realized the inevitability of failure and abandoned the idea of preserving the nation forever.
Her wish was only that, while alive, she could make this island her true resting place, becoming its rightful ruler, reclaiming what was hers.
Yet before her death, she granted Guinevere an impossible wish—to become the eternal queen of this nation.
Later, Guinevere himself finally descended into madness—or was driven mad by Morgan. He made a choice no normal human would attempt.
He began contacting beings that had existed since ancient times, those dwelling in the shadows of the world, forbidden even in the inner world.
He approached the Old Ones, deeply embracing their power, integrating it into himself, using it without restraint. In the end, he employed a method even Morgan could not comprehend, stealing the divine position of one of the Old Ones.
After that, the ruler of the deep sea ceased to exist—or rather, it would be more accurate to say that the being born as Guinevere in this world was from the beginning the human incarnation of the Old One, Cthulhu—or the "Egg of the Old Ones."
The anomalies appearing across the land reflected the increasing power he had usurped.
When the deep-sea faith spread, the ocean's creatures came ashore, and the deep-sea city of R'lyeh finally broke its seal, the Old One's Egg hatched completely. Guinevere fully absorbed the power of the oceanic deity. At that moment, Guinevere was the Old One, and the Old One was Guinevere.
Even something like the Imaginary Tree, which even the Lion King could imitate using the Holy Spear, could be replicated by Guinevere as the human incarnation of an Old One.
The cost: human history would lose its future, stepping into an endless and unfathomable era.
As the most loyal guardian of human history, Arai would not remain idle.
It began its preparations before all this occurred, identifying the most suitable savior to stop Guinevere, granting him luck akin to a protagonist's aura, allowing him to repeatedly survive dangers and steer events toward favorable outcomes.
The chosen savior was none other than Guinevere and Artoria's son—Arthas.
Whether it was Mordred's defection, Artoria's escape, or Arthas being taken away safely, all had Arai's subtle orchestration behind them.
As Morgan had initially hoped, Arthas inherited the excellent bloodlines of his father and mother. Like his mother, he was born with a strong, nearly draconic lineage; he inherited his father's wisdom and immense potential. Thanks to Morgan's careful cultivation, he also inherited her genius in magic.
Before the British Empire launched its conquest, he wandered across Europe with his mother and sister Mordred, growing, making friends, gaining knowledge, and studying magic. He even gained recognition from a holy sword, inheriting the right to wield the Sword of Victory.
When the British Empire began its campaigns, Arthas realized the source of the anomalies—the emperor, his father—and tried to oppose him, only to be defeated. He barely escaped with the scabbard of the Sword of Victory.
After fleeing to Egypt, guided by seemingly coincidental events orchestrated by Arai, he encountered the Atlas Academy and, after some time, became a disciple of the Academy's head, learning much of magic.
Later, using Atlas Academy's research and his own genius, he contacted the salvation organization from a thousand years in the future, requesting aid. The organization sent a rescue team to his time.
At this point, just as Guinevere was about to fully seize divinity and transform from the Old One's Egg into a complete Old One, the human history preservation squad arrived, alongside numerous heroic spirits summoned across different eras by Arai.
From there began a classic salvation story: the masters from the organization, working with Arthas, struggled to survive in extremely unfavorable conditions, uniting all allies they could find. Whether heroes of that era or heroic spirits from other times, all joined their ranks.
Among them were: the fishing war god from an eastern country, the founding emperor who loved shouting "Rome," a skeleton assassin wielding a greatsword, a chūnibyō king and his knights who once ran naked with their subordinates, a nightmare magician full of lies, brothers from India who joined due to the threat of Britain's iron boot, a rural village saint, a burly man who loved world conquest, an unnamed dual-personality legendary investigator... and even Arthas's mother and her knights, previously defeated by the Vicious Tyrant, summoned into this era.
Finally, the tyrant who sought to overturn human history was defeated by the combined forces of legends and heroes, just as his plan neared completion.
The history that supported his existence was pruned by the world's power, leaving no trace, and even those who participated left no records.
Truly, a grand happy ending.