Harry Potter and the Phoenix's Wish

When everyone is killed during the final Battle of Hogwarts, Fawkes decides to grant Harry one wish. Surrounded by his dead friends and plagued by the death of Sirius, Harry wishes for a chance to redo it all from the very beginning. Tags: Time Travel, Slight AU, Mostly Canonical Pairings (no HHr), Mild Severitus (no adoption or bio dad), Abused Harry, Mild Dumbledore Bashing