( Karna's POV )
When Karna genuinely got serious, his fighting style was unlike that of any traditional swordsman.
While the most common type of swordsman was a single sword wielder, in the modern day and age, dual wielders focusing purely on offense were not too rare either.
Since Karna was a guild master, often needing to yell commands in battle, in a vast majority of his fights, he only used the dual wielding style, however, on rare occasions, when he actually got serious about a fight, he preferred going beyond the two sword fighting style and adding a third sword to it.
Biting into a mouth sword, made with a custom handle according to his teeth shape, Karna transitioned from being a dual sword wielder to a triple sword one, only when he was ready to put his life on the line.