Ummm, generally this would go in the main hall, but, since I'm still learning how to do this, I'll end up moving this topic sometime in the near future. But, the spell sword brothers is pretty basic. Just get the sword familiar (in the Orlox's Quarters), and do the following:
Down, Down-Forward, Forward, Up-Forward, Hold up for a few seconds, Down, and then press attack. This must be done carefully, and it took me a little while to get good at this. Hope this helps...