It might be cool to just use basic magic for them the way I see it, but then again, I seem to make the absolute weakest OCs in this fandom. Swordsmen seem to always be associated with either fire or water, so maybe give them something like earth magic, which could be interesting, or air magic, if they're too fast for a tank character.
Earth Magic | Superpower Wiki | Fandom
Air Magic | Superpower Wiki | Fandom
It'd be cool if the earth magic was activated by plunging the sword into the ground, which balances itself out by giving enemies an opening, also counting as a weakness. The air magic could be by slashing the sword in a specific pattern. I'm not creating your OC, though, you are, so do whatever you think is best.
Also, I tend to focus most on magic, so if it's not a fantasy world, I'm sorry :/
