Originally Posted by
Zinato
What makes FFXI unique among numbered titles of the Final Fantasy world is it is the only updated one. It changes as time goes on making it the only "living" Final Fantasy world outside XIV. (which is another story) Point is it won't break cannon and so long as its not in a maingame storyline shouldn't affect anything. As is we have Final Heaven Tifa's signature move, Cadalbog Tidus' ultimate weapon. (though it looks more like Jecht's) Point is pieces of other final fantasys have already been placed in XI theres no reason a sephiroth BCNM couldn't work or for that matter play weapons with decent DPS that give a signature title characters limit break. (Grand lethal, Omnislash, etc.) These ideas are ment for the sake of fun and not to change things like VW storyline. Side quests like AF armor or the like.