Time Changes Everything

Harry Potter is lost to the Wizarding world and it is up to the Malfoy's and Snape to bring peace back to the world they live in. They have figured out how to make time-turners, how to get access to their bodies so there is only one of them in that time, and how to alter events in their favor, but they need more and the only way to do that is to go back farther than a day or two.