why do all of Voldemort's attacks happen at the end of Harry Potter's school years? Does it take that long to plan or does he just care about Harry's education? The fourth book/movie makes sense I mean you can't just come back to life with a snap of your fingers, he needed Harry's blood. One thing I ask myself though is that why doesn't he just slit Harry's throat? Why does it have to be magical? But you're going to have to ask him that question, well you can't but you can read: The Biography of The Dark Lord. It talks about his whole life, before Hogwarts and all.