[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!

[Slice-of-life story + no female lead + research]

Lin Yi, whose love for astronomy is etched into his soul, is born into the HP world with all the knowledge from his previous life and a super brain that can "remember everything he sees".

He thought he could easily become an academic star in the magical world, but he discovered that wizards' understanding of the brilliant starry sky above them was still stuck in the primitive stage of "divination of good and bad fortune".

How can we tolerate this?

With a wave of his wand and a telescope in hand, his goal is to elevate astronomy from a "required, easy subject" to a "cutting-edge magical engineering" capable of changing the magical world!

From drawing precise star maps imbued with magic to developing powerful spells that draw upon the power of the stars;

From analyzing the probability theory behind divination to creating astrological artifacts based on constellations...

While Voldemort and his followers were still obsessed with pure-blooded people on Earth, a scholar under the stars was quietly turning the entire universe into his magical laboratory.

This is the story of a hardcore academic genius who, in a magical world, uses scientific thinking to climb the magical technology tree, and incidentally crushes everyone else in the process.

When a science PhD travels to Hogwarts, he discovers that magic is just another form of energy—as long as there is a theory, it can be quantified, copied, and enhanced!

From analyzing the structure of wands to developing magic circuits and energy arrays, he ushered the wizarding world into the "era of technological magic."

Voldemort was sent to the research institute by him, and Dumbledore asked him to give a public lecture on "Magical Physics".

However, this was just the beginning—when he broke through the dimensional barrier, new worlds began to emerge:

In Middle-earth of The Lord of the Rings, he single-handedly suppressed Sauron;

On the continent of The Witcher, he combines magic and runes through alchemy;

In the Marvel Cinematic Universe, he even got Tony Stark to come and get inspiration from him;

After Harry Potter, he will eventually become the supreme god of magic in all the heavens and the myriad worlds!

Multiverse, academic genius, magic and technology, fast-paced leveling-up, multi-world travel, harem + conquest storyline

HP+ The Sorcerer Supreme, single female lead Hermione, with a system

In 1991, while the new students at Hogwarts were struggling with the Levitation Charm, Silas Killer of Ravenclaw could already casually open portals. This seemingly "Muggle-born" new student had actually awakened as a time traveler at the age of seven, carrying a head full of knowledge from the original stories and a "system," and moved into the magical castle four years ahead of schedule.

He disliked the wand for restricting his nature, and instead conjured light shields and lightning bolts with his bare hands. While others dodged trolls, he countered with an Avada Kedavra, forcing Dumbledore to seek him out for a chat.

Silas, possessing dual magical abilities and an unparalleled talent for witty remarks, becomes the biggest plot hole in the Harry Potter world. His Hogwarts experience is a collision of tradition and subversion, a legendary journey for a "prospective Sorcerer Supreme."

[Slytherin loyalty + plot disruptor + invincible + profit-driven + Slytherin's eternal god!]

I was transported to the world of Hogwarts, and when I opened my eyes, I was a baby, and a baby in the wild at that.

Just when Lucas thought he was going to have to restart the game, Snape, who happened to be passing by, picked it up!

He became the adopted son of Severus Snape, the youngest Potions Master in the British magical world.

He grew up at Hogwarts; while others entered at eleven, he entered at five.

On the day I officially started school at age eleven, I awakened the essential cheat code for transmigrators: the plot-breaking system.

You can get system rewards as long as the storyline breaks down.

Hogwarts Express is collapsing! Draco has become enemies with Harry Potter, and the reward is a weapon with maxed-out proficiency!

The Sorting Ceremony has failed, but the reward is a top-tier, max-level potion talent!

However, as his strength increased, Lucas's daily check-in style began to change drastically.

Holding the Gryffindor sword, he rode on the head of the basilisk.

Lucas smiled broadly as he watched the fragments of Tom Riddle's soul float out of the diary!

"Come on, Tom, say 'cheese' to the camera!"

...

Joel Hemis always thought of himself as an ordinary druid. Until he was eleven, when he received a letter delivered by an owl—and from that moment on, he became a proud little magical owl. ...That school year, the Forbidden Forest welcomed a Patronus. By the time all the teachers and students of Hogwarts realized what was happening, they were already surrounded by the Forbidden Forest! Until one day, the mysterious man came knocking—Joel: "Sorry, I just want to plant trees in peace and quiet, I don't want to fight!"... [P.S.: This is a lighthearted story about going to school and happily planting trees...No need to have read the original books.]

When Li Shang struggled to open his eyes again, he was greeted by a large, bushy beard. The bearded man looked at Li Shang tenderly, his eyes filled with tears.

Now that we've come to this magical world, let's have some fun!

Enhanced meditation techniques; a wider variety of alchemical tools; more magical potions; more powerful magical creatures, and more.

Transmigrating into Harry Potter, he gains a system that allows him to grow stronger through learning. While young wizards are still struggling with the Levitation Charm, Rock has already mastered the entire Standard Spellbook. Hermione: "His notes are more complete than Mrs. Pince's!" The Weasley twins: "Great Rock! We call you the strongest!" Snape: "Potter! If your potions were even a tenth as good as his..." [Flicker] is maxed out to the Law level, a single [Radiant] Holy Light will crush any dissent. [Levitation] is maxed out to the Myth level, a wave of the hand [Universal Pull] will hold the stars in his palm. When Voldemort brandishes the Elder Wand, announcing his 'Return of the Dead', Rock looks at the densely packed, dazzlingly bright max-level skill panel and silently pulls out the wand he's swung countless times. "Tom, have you ever heard of a spell that falls from the sky... Expelliarmus?"...

The rating is low at the start, don't be scared away! I solemnly swear, this is a divine herb, not poison. Transmigrating to the HP world, Luke awakens the Magic Chef System, harvesting emotional points with delicious food to exchange for rewards.

As for learning magic at Hogwarts? Sorry, you can freely exchange for spell learning speed, potion-making skills, and alchemy experience. With a system, you can really do whatever you want.

Thus, the teachers and students of Hogwarts witnessed the terrifyingly strong yet seemingly unorthodox freshman Luke.

[Congratulations, host! Your Magic Hawthorn Candy Balls have successfully garnered 1000 positive emotion points, easily earning you the Beginner Transformation talent!]

Minerva McGonagall: Didn't the principal say you weren't good at it? You learned it in the time it takes me to twist my hip?

[Congratulations, host! Your magically spicy hot pot has successfully garnered 10,000 positive emotion points, instantly transforming you into a fire god in half an hour!]

Dumbledore: To be able to perform such a move with just a slight glance at my notes... perhaps he's more suited to it than Harry...

[Congratulations, host! Your Magic Lamb Skewers and Lamb Kidneys have successfully garnered 10,000 negative emotion points. You can claim the Dark Lord's Three-Piece Set without any side effects.]

Voldemort: You're just a little wizard from Badger Hill, why aren't you doing your job properly and learning dark magic? Don't I have any dignity?

...

When everyone's stomachs took the shape of Luke's, his magical talent and strength skyrocketed. A chef? Call him the God of Cookery!

The Death Eater was stunned: Oh my god! Run!

He is the real demon king!

Who has ever seen someone catch Avada Kedavra with a spatula?

When Rolf opened his eyes, he found himself transformed into a Squib. But... what's it like to have a grandfather named Newt Scamander? Rolf, a descendant of a family of zoologists, was bound to a dimensional trading system and became a dimensional merchant. Am I... going to become a multi-dimensional livestock tycoon? (Book club: 378622434)