The Last of the Peverells

The war had changed him. Most would say for the worse. He had fun fighting Dark Lords, so Harry made a career change that set him on the path of greatness. After a disastrous mission, he finds himself in a new world. He doesn't know why he was put here or how, but the world would soon know that the Last Peverell had arrived. Hang on. What was that about a Girl-Who-Lived? H/Multi