Harry Potter and the Outer One

Extreme AU! Harry Potter stumbles upon 12 Grimmauld Place after being left in London by the Dursleys. After being taken in by a portrait, gaining a mysterious wand from an even more mysterious woman, and being spoken to by an old book, Harry is told that he is to be the harbinger of the end of days. Will he succumb to his apparent destiny? Pairings Undecided, as of 3/29/2019