I've been thinking about the whole Alfred, Arthur, Blaster Blade, Caliburn thing. What if Blaster Blade is metaphorically the King's Sword? Both Blaster Blade and the man himself are 'The Sword of the King'?
I guess that makes PBD/PBO Mordred and Blaster Dark his sword, which I can't find a name for other than 'The Coward's Sword'. I also wish to point out Phantom(Ghostly, Shadow), Blaster(Theme of Excalibur) and Dragon(Pendragon), I suggest them name comes from him being a Shadow of the King, Blaster coming from everyone wanting Caliburn.