Harry Potter and the Shadowmancer

Just as Harry and his cousin Dudley are attacked by Dementors, an unexpected savior comes along and deals with their attackers. Not aware that their paths will cross again, Harry goes onto his fifth year at Hogwarts, not aware that his life is about to change...when he falls under the shadow...of the Shadowmancer. Pairings Harry/Hermione. Rated M for heavy violence, language, etc.