"You want to take over the wizarding world?" Lucius Malfoy looked interested.

"No," Lin Zhen smiled. The sunlight shone on him, making him look like a holy angel. "Controlling the world is too tiring. I just want to change the world."

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Having transmigrated into the last bloodline of the Grindelwald family, he initially wanted to live a low-key life, but was forced to bind himself to the "Underworld God System".

From then on, the style of Hogwarts completely went astray.

"Petrify everyone? That's too lame. Come and witness the power of our Zaun petrification!"

"Want to learn the Patronus Charm? First, pay protection money to the system. Avada Kedavra can turn a melon into a rainbow color for you."

Dumbledore looked at the savior, who had been turned into a "henchman," and fell into deep thought: "This kid...maybe he can form the most cowardly villain alliance in history with Tom?"

Until one day, I was cornered by the Dark Lord, and the system suddenly prompted me—"Hey buddy, there's only one guy on the other side, call for reinforcements to take him down!"

Docroft Evans, a transmigrator from the Muggle world, finds himself as the older brother of two special sisters: Lily, who possesses amazing magical talent, and Penny, who yearns for magic but cannot have it.

When his Hogwarts acceptance letter arrived, he embarked on his wizarding journey. Unlike in the original story, he met the lonely Severus Snape in his childhood and decided to protect this misunderstood boy in his own way.

That year, the werewolf howled, and he died in the Screaming Shack.

That year, golden energy accompanied by a whooshing sound like rusty gears grinding, the dead returned to the realm of the living.

Revenge? Retaliation? Or forgiveness?

Wizards become Muggles, and Muggles become wizards—should they disappear or merge?

Jiang Wu, carrying the divine soil "Xiran Seed", airborne Hufflepuff.

Mandrake? Hum a Chinese folk song and get hypnotized!

Greenhouse vegetable farming? Cedric came over carrying dragon manure: "Do you need any help?"

Halloween feast? The snail noodle hotpot stinks, but Said pushes away the green mist: "...Can I try it?"

(No system + villainous protagonist + ensemble cast) (PS: Several million-word HP novels already exist, feel free to read) Kong En, Chinese. He entered Hogwarts in 1971 and, after graduating from Slytherin, joined the Ministry of Magic as an outstanding graduate. Using his memories, he helped Fudge become the thirty-second Minister for Magic, earning him a close confidant. To counterbalance Dumbledore, Fudge sent him to Hogwarts as a "Senior Investigator," while Kong En, seeking further advancement within the Ministry, chose to use extreme exam-oriented education methods to rapidly improve student grades, thus enhancing his own political standing. "Now, I will issue the Ministry of Magic's 'Education Order No. 23'!" "Hogwarts will be under closed, centralized management." "Boys will have buzz cuts, girls will have short, shoulder-length hair, uniform hairstyles, uniform clothing." "Timers will be installed in the toilets." "Male..."

Feng Xingchen lived in China for 12 years. A magical uprising killed seven of her servants. To suppress her inner spiritual energy and magic, she was forced to teach at Hogwarts in England. Yes, as the eldest sister of the Tianheng Sect, she came to teach. But something seemed off. Why was that tattered hat constantly shouting "Slytherin"? Why did that gloomy, black-haired man with a bun stand up and applaud? Huh? What's that platinum-haired boy over there doing, pulling her along? Also known as "Hogwarts...

Relaxation + delicious food + healing, the taste of magic.

Ye Tao, a recent graduate of New Oriental Chef Academy, shared delicious food with his friends in this magical world, exchanging stories and experiences. The Hogwarts farm became the focus of their conversation.

The magical barrier shattered under the spell of the cursed spirits! Dumbledore pointed his wand at the white-haired man emerging from the crack: "Are you friend or foe?" Gojo Satoru removed his eyepatch: "Here to rescue people—and incidentally, to have a cross-world brawl."

Leonard, an earthling, travels to Hogwarts and awakens the powers of the Seven Gods of Teyvat (wind/rock/thunder/grass/water/fire/ice), but he needs to gradually unlock them through the sacred relics of Hogwarts' underground leylines - the statue of the God of Wind in the Astronomy Tower, the statue of the King of Rock in the Chamber of Secrets, the Fountain of Wisdom in the Forbidden Forest... Each sacred relic contains a thousand-year contract between the ancient elemental wizards and Hogwarts.

As Hermione Granger's distant cousin, his wandless levitation and rock-lance combat astonished the wizarding world. Hermione, with her photographic memory, translated these powers into learnable "elemental spells," becoming his sole theoretical partner. From using wind to generate bay leaves in Potions class, to using a rock shield to block the basilisk's petrifying gaze in the Chamber of Secrets, to using lightning to split the Dementor's black mist in Azkaban, the two redefine the possibilities of magic through the complementary "wisdom and power" of the original novels.

As the power of the Seven Gods is gradually released, Leonard discovers that Voldemort's Horcrux is actually a "crystallization of abyssal energy", which can only be destroyed by the corresponding power of God's Eye - the Rock King's Spear shatters the golden cup, Wuxiang cuts off the diary with a single blow, and the Echo of Green purifies the poisonous fog... and Hermione pieces together a bigger truth from the family genealogy and "A History of Magic": the gargoyles and leyline obelisks of Hogwarts, and even the entire magical world, are all in line with the elemental laws of Teyvat.

When the final battle came, the shadows of the Seven Gods appeared over Hogwarts. The Wind God swept away the Death Eaters, the Rock God held up the city shield, and the Thunder God cut off the dark magic... Leonard and Hermione stood in the center of the seven-pointed star, weaving the fate of the two worlds with the resonance of elements - it turned out that as early as a thousand years ago, the authority of the Seven Gods had laid the foundation for the protection of the world.