Wow, I take it you like katana/saber like blades huh? I was just thinking, what if this sword actually existed? The scientist would probably say its origins are nostly from Sweden or normadic asian tribes. Hmm why did you decided on the name Blue Flame for your sword?
I haven't seen such swords before... Though somewhere you may find anything of the kind. As somebody said: "Everything what may be imagened exists". As for its name I thought that the Blade has bluish colour (at least at its sides).