Hogwarts: A Magical Elegy

Not serious—I'm in the wizarding world during Grindelwald's peak, and I transmigrated without any cheats!

Serious—

The story begins a few years after the events of Fantastic Beasts and Where to Find Them, before the main Harry Potter plot.

......

That year, the first Dark Lord summoned his saints in Père Lachaise Cemetery.

That year, the second Dark Lord had just been born.

That year, the greatest white wizard in history was merely a Transfiguration professor.

This year, in an orphanage outside London, our protagonist, Cypher Corvin, was born...

PS: Hogwarts, Harry Potter, Wizards, Magical World, Grindelwald, not strictly canon, with a few modifications!