The Black Fortune

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!"