[Based primarily on the Harry Potter movies, with some FGO elements added] [The author received guidance from Rowling; this is not random writing or based on assumptions, so please read with confidence!]

[The main character will not become the Saber King; there will only be a few chapters where he/she becomes a girl for fun. I couldn't think of a better name at the time, so I just used this one. The name will be changed after the book reaches 200,000 words. If you mind this, please don't read on. I'm very sorry!]

When Lynn was reborn into 20th-century London, he thought he was living the life of a protagonist in a rebirth novel.

But tell me, what the hell is magic in this world?!

As Lynn gradually accepts everything and prepares to enroll at Hogwarts to learn magic and fight Voldemort.

Tell me what the hell a magic circuit is!

Fate is here, right?! Does that mean we'll have a Holy Grail War next?

Screw the Type-Moon universe, I'm quitting, I'm giving up!

The last bell of the century has sounded.

The shadows are hazy, and the last demon hunter is chasing the out-of-control werewolf.

The blood moon is in the sky, and the ancient vampires are preparing to welcome the return of their ancestor.

Shrouded in fog, Little Red Riding Hood in Storybrooke is looking for the descendants of Grimm.

Wizards walked out of Hogwarts, "The damned mudbloods are usurping the glory of purebloods."

Groudon tore through the ground, "The thugs from Azkaban are on a killing spree."

Kyogre stirred the waves, "A new Dark Lord is about to ascend the throne."

Rayquaza pierced the sky, "Great Wizard King, Builder of the White Tower, Swordmaster of Gryffindor, Paris respectfully welcomes you."

Allen touched Arceus beside him. The sixteen tablets of creation radiated eternal light. "I'm just a training master who does this out of interest."

van, who traveled through time and space and became a descendant of Merlin: Do you know how many secrets there are in the magic world? Why can ancient runes be engraved on magic wands? Why can it enhance magic power? What is its connection with modern magic runes? Is the boundary between life and death behind the curtain of the Department of Mysteries of the Ministry of Magic? Is there a secret left in its time hall that can turn back time with a time converter? Why does prophecy magic need to contact celestial bodies, why can Merlin understand the language of all animals, and why is the magic of love so powerful? Knowledge is infinite, but my life is limited! I will never allow anyone to prevent me from exploring secrets! I'm talking about you, the noseless monster! You are a mediocre person who only knows soul magic and black magic! This book is also known as: "Hogwarts: Merlin? Why do you call me ancestor?" "Hogwarts: Voldemort? He knows nothing...

Voldemort: Why? Why? I already have the Elder Wand, how could you defeat me? Harry!!! Harry wiped the sweat from his nerves with his sleeve and said: Because I defeated you a hundred times in the game! Voldemort: What? What game? Defeat me a hundred times? Hermione: Shut up, or you'll be smashed to pieces! Harry, why do you never remember to finish off the boss?! If you, dear readers, find "The Game Producer of Hogwarts" enjoyable, please don't forget to recommend it to your friends on QQ and Weibo!

Many people spend their entire lives trying to find their true talents, but Seamus Finnigan's talent is undeniable. Just imagine, 30 years from now, who could stand up to me, the Demolition Man? Dumbledore? Grindelwald? Voldemort? Even Merlin would have to retreat. ...Ahem, keep a low profile. Keep a low profile.

"How does it feel to be given the name Rozier?" "Get lost!" "How can you be so heartless!" "Stop with that gloating look. And can you please stop bullying those three little ones and Malfoy? You're practically ruining them!" "Tch, what do you know? You're having fun outside, while I can only find my fun at Hogwarts." These were the days these two shameless rascals spent having fun at Hogwarts.

[Cyberpunk][Harry Potter][Dual World Shuttle]

Harry Potter: Old man, the work is done, give me the money

Dumbledore: Harry, 60 points from Gryffindor for your bravery.

Harry Potter: Damn it, I almost died there, and you just give me some extra points and that’s it?

Dumbledore: ...

Malfoy: Pott, you shouldn't be hanging out with those mudbloods, the disgrace to purebloods.

Harry Potter: Go away, company dog, oh no, puppy

Priest: Harry, I have a big order that I think you can take on.

Harry Potter: Dad, don’t you always ask me to handle your big orders internally?╮(￣⊿￣)╭

V: Harry, you, want to go to Arasaka Tower with me and cause a scene?

Harry: You hit the nail on the head. Let the year 2023 bring back the past, V. Let's burn Arasaka Tower to ashes!

Mann: Harry, how are you? (He leans forward) Um, that soothing agent you have...

Harry: It's the soul... Never mind, I'll give you a 30% discount for Rebecca's sake.

Rebecca: Harry, explain why you stood me up last time, honey~ (pulling out the iron gall)

Harry: I, um, I said I traveled through time, do you believe it... Don't load the gun!

Left at his aunt's doorstep, baby Harry Potter arrived in Night City after a mishap. Raised by Father Sebastian, he became a "special" mercenary for the Valentino Gang. But after a mission, he traveled back to his original world, and a line of small words appeared on his prosthetic eye: Shuttle Energy, Accumulating...

Eric, who had been forced to play The Sims for ten years, opened his eyes again to find himself finally in control of his body. Before he could even get started, he was bombarded with a barrage of information that left him dizzy. "I've arrived in the magical world of Harry Potter? And the original system has self-destructed?" When the Sorting Hat was placed on his head and loudly proclaimed Azkaban, Eric knew he was destined for greatness.

Voldemort's green light tears the sky

Grindelwald's Fiery Fire burns the continent

Loxias' Nightmare Obliterates Everything

The shadows of the three dark lords devour the crumbling magical civilization

The last light will be completely extinguished on this cursed land. On the scorched earth, the time traveler Fowles raised his magic wand amidst the corpses and dust!

"This world must change under my will." Fowles said softly to the three Dark Lord corpses.