None whatsoever, I hate to say.
The idea of 'magic' weapons is more about psychic or energy protection than it is about physical.
There are those who will make such claims as "putting up" an intimidation glamour if they think someone is about to aggress them, but is that something you want to use against a violent person? Or would you rather beat pavement out of there?
That said, there are some forms of Tai chi which use a sword as a tool in the exercise, but it is not so much about fighting as it is about energy flow (being Tai Chi).