[quote=Raijinslayer]
True, but the swords are more renknown, I believe, plus I don't see how I could but a swordsmith in a Saber class. Caster, maybe, but not Saber. That's why I want to go with the swords themselves having like a soul, or something of that nature.
[/quote]

You could always make something like Assassin. It seems there were more than one wielder of said blades, so there are actually a lot of guys that are simply referred to as Muramasa/Masamune. Of course, if the GM's would allow it, and you like the idea! :P