The items (swords, daggers, jewelry, what-have-you), were, according to legend, found by Saladin shortly after he conquered/reclaimed Jerusalem (without the slaughter that the Crusaders indulged in..). Their actual origin is unknown; the faithful say that they were given to Saladin (and the faithful who followed him) by Allah to work towards protecting the Faithful and spreading the Faith without cruelty, or slaughter of the innocent. Hence, they are meant to be used against the true enemies of the Faithful, the supernatural monsters who prey on mankind.