Although technically it isn’t a sword that players can equip, that is for good reason, because last time it was drawn in anger, it kind of destroyed a whole country, both literally and metaphorically – It was directly responsible for the destruction of Tavnazia during the Crystal War, in that when it was drawn it caused such an enormous explosion it severed the Tavnazian Peninsula from the Quon mainland, turning it into a ruined archipelago and sealing Tavnazia’s demise. It’s also directly tied into the very future of San d’Oria itself, featuring in a number of mission cutscenes.
I always give it to Terra.
Squall’s Flame Saber and Punishment <3
My fav Excalibur is definetely from XI.
But I don’t know which sword is the coolest…
I love many from XII. The Treaty Blade for example.
Tournesol was awesome!
The masamune form XII is definetely my fauvorite Masamune.
But I think that the coolest sword that takes the cake above all of them. Would be the Save the Queen form XII
Also I want to mention the Ragnarok from FFTactics, has a certain charm that I cannot deny.
http://images.wikia.com/finalfantasy/images/9/9f/FFT_Ragnarok.gif
As for FFXI’s version of Excalibur, it’s just a pity it’s so damn hard to get in the game (just getting it’s useless base version the Relic Sword is hard enough – the chances of it dropping in Dynamis Windurst is ridiculously low). I have the Relic Sword myself, but as I have neither the gil nor a linkshell interested in helping me farm the ancient currency/materials needed to upgrade it all the way to Excalibur, it’s going to remain a useless piece of junk gathering dust in my Mog Safe.
Course, I’d have to also level PLD to 75ish to use it too, even if I had all of the above, but then that’s a whole different barrel of moogles. 😉
Makes me wonder why I asked in the first place. Oh yeah, because I was genuinely curious and couldn’t think of another way to achieve that.

Come on, who doesn’t love that sword?
Who do you reckon has the best sword or weapon?
Oh yeah, and try to include a picture ^.^
I was going to post the same sword, but you already did it ^^|
I really like Angeal and the famous Buster Sword, it’s a freaking 2 metres sword!