Harry Potter: I'm Really Not the Third Generation Demon King

As the grandson of Gellert Grindelwald, Claude was treated as the third generation of the Dark Lord from the moment he began attending Durmstrang. Later, forced to defend himself, he caused a disturbance and was expelled. After transferring to Hogwarts, he enjoyed a pleasant life, but later discovered that the wizarding world was not as simple as he had imagined: traveling across millennia, applying magical rules, possessing artifacts, and even discovering the existence of gods. All of this was due to a wish granted by a god.