Using a Katana

Well I made a Fighter and I focus on the Katana, which happens to be my favorite weapon. Well I would like Him to go up as an weapon fighter but could you create a custom class that uses the Katana. I made my main character as crono trigger, lol. I just figured you might have at least a few pointers or maybe even created a class for that. Thanks for lisening. Look at my build on NWN2 Character Builder under the same name I use onn your site here.