Harry Potter: A Certain Ancient Rune Professor of Hogwarts (TL)

Synopsis: Three years after graduating from Hogwarts, Felix enters the school again.What will happen when Muggle wisdom, innovation and magic come together?PS1. Professor of ancient magic runes.PS2. Timeline, second year of the golden trio.PS3. MC don't know plot of the HP, other than it's adventure of three friends with 8...