Salazar Slytherin was resurrected a thousand years after his burial.

After waking up, he returned to Hogwarts anonymously and reborn, and then he was shocked to discover:

At that time, families who were keen on marrying Muggles or simply being Muggle-born claimed to be pure-blood families.

The lunatic who appeared out of nowhere and pretended to be his descendant became the dark lord that people talked about, using his own banner to promote extreme ideas.

While all kinds of magic spells have become fancy, the bodies of wizards are extremely weak, even the descendants of Gryffindor are no exception.

Slytherin: Voldemort, I think you're a bit extreme - and, how come I didn't know I built a secret chamber in the castle? Wait, you're not referring to the basement where I used to teach, are you? !

[Single female protagonist Hermione (yandere version), invincible, daily, only the Harry Potter world, a lot of personal settings.]

[I'm really a yandere, I don't like it if you mistakenly enter. I really can't write a description, so let's leave it at that.]

Humans are the protagonists of this world. They will never know their own potential, let alone what kind of existence they can give birth to.

When humans created the word fear, fear took on a physical form...

Every time you travel through a new world, you become a strange character or even a non-character.

Talking Tom, Knight, Witch, Slime, Snow King...

Ding Hai was also forced to start a wandering life in the heavens and all realms.

When he turned into Tom Cat, he received an invitation letter to Hogwarts School.

Then, the adventure of the fun people began...

Edward traveled through time again and came to a mysterious world.

From then on, there was a stranger here who could travel between the two worlds regularly.

So, what will he bring to both worlds?

ps1: This book is a traditional fan work and will not completely abandon the original characters to tell the story. The heroine is Miss Justice, and she may join the Queen later on.

ps2: The path of the protagonist of this book is semi-original. He takes the path of [Apprentice] in the early stage and starts to change in the middle stage.

ps3: The protagonist is basically invincible in the same level, but he can't kill high-sequence enemies.

In the year 1340 of the Shire Reckoning, one year before the departure of the Lonely Mountain expedition, the Grey Wizard had yet to visit the Shire, the Dwarf King was still forging weapons in the Blue Mountains, and the dragon still slept deep within the mountain…

In that very year, a young wizard unexpectedly crossed into Middle-earth, carrying the Hogwarts Sign-in System.

Overnight, Hogwarts Castle rose from the ground, standing tall and majestic on the lands of Middle-earth; flying broomsticks streaked across the skies, becoming a unique sight in this world.

In the wild lands, the legend of a black-robed wizard began to spread silently.

He was a friend of the Elves, a bane to the Orcs, a nightmare to the Trolls, and the lifelong nemesis of the Dark Lord Sauron.

Years later, when the Dark Lord was defeated, the Elves sailed West, and the Age of Men began—Duir, who had signed in at all corners of Middle-earth, looked toward the fabled lands in the West.

[Location: Aman. Would you like to sign in?]

As a time traveler, Agares decided to stay away from Hogwarts after graduating, fearing he'd be caught up in the dangerous situation. However, his thoughts changed after he struck a deal with Arceus, the Pokémon God. Chosen by Arceus as a Pokémon ambassador, Agares decided to start promoting Pokémon among the more receptive wizarding community. Five years after graduation, Agares returned to the magic school, this time as a professor.

Forming a bond with a woman will earn you rewards; forming a bond with a noble woman will earn you even more rewards.

Having experienced two consecutive time travels, Li Zhihui finally awakened his system, but he ended up with an unorthodox one.

"So, it's really not that I'm promiscuous, it's just something that can't be helped."

...

Elements: [Extensive use of internet memes] [Highly charismatic paladin] [Semi-invincible build] [Pseudo-D&D setting (primarily based on the game's world view)]

The following worlds have been confirmed: Baldur's Gate, The Witcher, Cyberpunk 2077, and Hogwarts.