To Live Is The Rarest Thing

A disastrous trip to a waterpark (thanks, Dudley!) unleashes almost 200 lifetimes worth of memories, and now Harry is stuck as a ten-year-old while his soulmate is a wraith set on killing him. A very old and cynical Harry sets about correcting Tom's poor life-choices while avoiding Dumbledore and his Order's panicked searches for the Boy Who Disappeared. Harry/Tom.