The third Dark Lord came from Hogwarts

[No heroine, Hermione is positioned as a follower, similar to Vita Rosier and Bella]
Argus thought he was reborn, and wanted to rely on the memory of his previous life to realize his plan of making a fortune and raise a few… well-behaved pets.
Until one day he saw a white-haired old man with heterochromatic eyes, he knew that he had traveled to the world of Harry Potter and was an orphan of the Grindelwald family!
Argus, who had been dormant for several years and used the system to max out his talents, finally came out!
Animagus? Isn’t it enough to have hands?
Brain occlusion? Easily maxed out!
Dumbledore: I thought Voldemort’s talent was invincible, but I didn’t expect someone to be stronger than him!
Snape: In front of Argus, no one dared to say that he was a potion genius!
Voldemort: You say I’m the Dark Lord? Argus is ten thousand times darker than me!
Argus, who became Gellert Grindelwald’s adopted son, inherited his father’s will and is about to lead the saints back.
But the first thing he has to do is to give a world-shaking speech in Nurmengard…