After the Final Battle, Harry Potter falls apart consumed with grief and regret. Ancient magic decides to intervene and Harry notices that many things have changed... Timetravel, alternate ending from DH. Rating on the line.

He finally defeated Voldemort after a long four-year war, and realized that he lost everything that he swore to protect. Consumed with sorrow and rage, ancient magic comes into play, and Harry opens his eyes to a time that is not his own...