Praeceptor

Tom Riddle is asked to be Bellatrix Black's godfather. For years, he takes his duties very seriously. Even when he travels to the Continent for a decade, he sends her letters and gifts. But when he returns home, he finds a nearly-grown witch filled with Darkness and a craving to learn the Dark Arts he's studied. What will Lord Voldemort do with the vicious, grown witch she becomes?