During Harry's third year, he overhears a pair of sixth year ravenclaw students talking about Occlumency, and gets curious. Includes Bad!Weasleys, Dumbledore and Hermione, Godlike!Harry and the rest of the sort.
What happens when an immortal Harry Potter goes back in time to teach his parents defense against the dark arts? Chaos, of course. Lots of magic, Animagi and Time Travel.
When a brutally intelligent and insane Harry Potter arrives at Hogwarts without morals, how will this change the game? Starts in fourth year. Involves Animagi, Rituals, Powerful magic, Bashing of AD, Mostly Indifference towards Weasleys and Grangers.