After Aoko Aozaki and her group left the Fairy Calendar and dove back into Imaginary Space, Morgan spent a hundred years meticulously analyzing the structure of the Fantasy Tree from head to toe, eventually concluding, "Though it's exquisitely and beautifully constructed, it's useless to me."
Next, she spent another hundred years developing a plan to rebuild Fairy Britain, then began slowly extracting the magical energy from within the Fantasy Tree.
As the Fantasy Tree's magical energy decreased, the already unstable Fairy Britain Lostbelt, which settled deep within the Sea of Imaginary Numbers, became even more unstable. The Mosses launched a massive assault, and rumors about the coming Curse King spread everywhere. However, thanks to the suppression by the Fairy Knights, the situation remained under control.
During the third century, as the Fantasy Tree's power waned, the Shadow Isle of Ireland outside of Britain was gradually swallowed by the Sea of Imaginary Numbers. The remaining fairies of the northern king's clan were forced to migrate entirely to Britain, where they founded the northern city of Edinburgh.
In the fourth century, Morgan destroyed the Fantasy Tree completely and used its power to protect Londinium. All the lands in Britain apart from Londinium became void and dead, as all the fairies disappeared.
In Year 1 of the Fairy Calendar, Morgan used all the Fantasy Tree's magical energy to reconstruct the entire Fairy Britain with Londinium as the core, reviving those fairies who had vanished into the Sea of Nothingness. Thus, the Fairy Calendar ended.
In Year 1 of the Queen's Calendar, the Fairy Britain Lostbelt became the legitimate parallel world "Lostbelt World Fairy Britain," officially becoming a competitor for parallel universe energy with Proper Human History.
The offspring of the fairies once killed by Aoko Aozaki's group and the Round Table coalition gradually revived, bringing chaos to Britain.
However, Queen Morgan announced a new calendar system, requiring all fairies (except those exempt from taxes) to pay an existence tax—a portion of their lifeforce, contributed annually as magical energy to the queen.
In Year 400 of the Queen's Calendar, disputes arose between the northern fairies of Edinburgh and the southern fairies of Londinium over the existence tax, leading to tense relations. However, Queen Morgan and Queen Mab concluded a secret agreement: all lands north of Manchester would be ruled by Queen Mab, ushering in a period of peace.
In Year 800, out of jealousy of Gloucester's prosperity, the Fang Clan fairies of Oxford launched a surprise attack on the Wing Clan fairies. By the time reinforcements from Londinium arrived, only a third of the Wing Clan's population remained.
Fairy Knight Bedivere Wryneck, leading the reinforcements, slaughtered all invading Fang Clan fairies. The current Fang Clan chief was killed on the spot by Wryneck, whose body became the new Pilgrimage Bell (the previous one was damaged in a disaster), which Wryneck secretly sent back to Londinium for safekeeping.
In the Year 1000, the Moss War broke out. Curses from the Great Hollow awakened the Mosses throughout Britain. Queen Morgan, the Fairy Knights, and the Round Table army cooperating with Queen Mab's northern fairies, finally defeated the calamity, but the fairies suffered heavy losses—about 50% mortality.
The Curse King leading the attack on Londinium was killed by Bedivere, but not before cursing them: "Next time, it will be your turn."
To guard against the curses emerging from the Great Hollow, Queen Morgan moved the capital from Londinium to the fortress city of Camelot in the north.
The Curse King's curse shifted from Bedivere to the Fang Clan, leading to the birth of Barghest, a fairy nearly as strong as Fairy Knight, nicknamed the Fairy that Devours Fairies.
In the Year 1400, Queen Mab fell into eternal sleep, and her successor Cnoc na Riabh was born, becoming Edinburgh's new ruler.
In Year 1900, the Great Catastrophe revived. Darlington was destroyed; Fairy Knight Arthur defeated the catastrophe and rebuilt New Darlington. Barghest was named by Queen Morgan, becoming Fairy Knight Gawain and the lord of Manchester, ruling the remaining Fang Clan fairies.
In Year 2001, a rebellion broke out within the Mirror Clan. Some fairies united and killed clan chief Ainsel, plunging the clan into civil war.
The cause: Conservatives believed that while Queen Morgan rang the first Pilgrimage Bell, she refused to continue the pilgrimage journey, making her a heretic, while chief Ainsel supported Queen Morgan, believing she was the prophesied child who would save Britain—thus, also a heretic.
In Year 2011, the Mirror Clan was essentially destroyed by civil war. Camelot did not intervene; only a few wandering fairies were accepted by Camelot and other cities.
In Year 2015, Gareth, a descendant fairy of Ainsel, was born in New Darlington.
In Old Queen's Calendar 2017, Chaldea arrived in Fairy Britain, joining with Fairy King Oberon. Mash Kyrielight was sent back to the Fairy Calendar's past by Queen Morgan's water mirror magecraft.
...
"Eh? Is this Londinium 2,400 years later?" Totorot looked around the city streets with interest, then disappointedly concluded, "Nothing's changed at all!"
"Well, it's a city run by fairies; it's normal for nothing to change," Ector said, patting Totorot's shoulder. "But it seems they aren't in this city?"
After two weeks of sailing the Sea of Imaginary Numbers, Aoko led everyone back to Fairy Britain's Londinium via the Ark World, arriving 2,400 years later.
"They probably moved to the Great Hollow nearby," Aoko looked around and said. "Let's take a quick look here, then head to the Great Hollow and check things out. We can also look for Ritsuka Fujimaru and the others. What do you think, Mash?"
"Mm!" Mash replied. "The place where we got separated from Senpai and Da Vinci was near Norwich… Should we check the east first?"
"We could," Aoko considered. "Because I used Artoria as an anchor point for this world line's imaginary number navigation, the Queen's Calendar history is different from what you previously knew, Mash. Meeting Ritsuka and the others to confirm how much history has changed is important."
"Does that mean their memories might have changed too?" Mash asked anxiously. "Would that be dangerous?"
"I don't think so," Aoko replied after thinking. "The biggest side effect would be memory deviation under world correction, but if they stayed in the imaginary number submarine, they shouldn't be affected."