Original sentence: In marvel comics the X-men member Wolverine, once incountered a demonic swordsmith called Muramasa who, impressed by Wolverine, created a blade so powerful, it could kill even Wolverine, and those with similar abilities.It would later be destroyed.Wolverine later claimed the blade and gave it to cyclops, just in case.but a shard is stolen by Wolverine's son Daken and melted down and bonded to two of his claws