His Gray Apprentice

EWE PWP - Harry Potter has fought against the evil powers of Lord Voldemort for nearly all his life. In one final battle, they both return to their past bodies. However, this time, Harry has no follow the past timeline. This time, he needs an apprentice. Maybe a blonde haired Slytherin will do... STARTS IN THE GOBLET OF FIRE & T FOR NOW, MAY BE ELEVATED LATER ON.