The Mysterious Professor at Hogwarts

The Mysterious Professor at Hogwarts.
Main Content:
[HP fanfiction + behind-the-scenes plot twist + plot development] [Becoming powerful and dominant in the early stages, slightly slow-burn] [Hiding ambition and the desire for conquest behind a trustworthy exterior and seemingly sincere words]
Turville, Durmstrang's most outstanding graduate, arrives at Hogwarts.
"One day, Muggles will be able to observe magic using science, see through our magic, and build a mathematical model for each spell."
"What will wizards do on that day?"
"Will they be treated like rare animals and locked in cages?"
"Or..."