Before the Black Rite

 Set slew Osiris, and cut his body into thirteen pieces, which he scattered around Egypt, making them very difficult indeed for Isis to find, if she were to rebuild him. After ages of searching, she had finally collected twelve of the pieces; but the thirteenth, the most important, and most delicate, was still at large (no pun intended). What Isis discovered, was how hard it was to ask anyone if they had seen it. "Umm, it's about this big, it's, umm.. Well it's kind of, uhh... I mean, if you've seen one just out on it's own you'd know it, right ?.. Well, if you happen to find a lone, err, Thingy, call me at this number, ok ?" And thus did it take quite some time before Osiris was whole enough for the magical Rite which would see him reborn as Horus the Avenger...