Harry is just about done with horcruxes, with everything, when Dumbledore drags him to a creepy lake in the middle of nowhere to retrieve a locket. He's got a locket in one hand, a rapidly fading Dumbledore on the other, when a body drags itself out of the lake, dripping wet and generally worse for the wear. "What the fuck are you waiting for?" The stranger roared, "Move!"

A woman claiming to be Harry's sister approaches him at Privet Drive on July 31st, 1996. She speaks of another world, one of peace and plenty, ruled by a benevolent leader. She speaks of Atlantis.

There's a talent that some wizards can manifest - that of an elemental. Spirit elementals have been persecuted since they were discovered because their powers also confer upon them the ability to control life and death. Since the Ministry of Magic was established, Unspeakables have been culling the population of spirit elementals until none remain. Until Harry.