When Regulus Black fakes his death he forgets to hide one clue. With that clue Dumbledore found him and basically forced him to teach at Hogwarts because of his skills, at first he dislikes the idea of teaching at Hogwarts but with the time he starts liking it and he becomes the best teacher Hogwarts ever had according to tue students. All rights belong to J.K.Rowling Started: 1.7.2021