Okay, I found a way to Finesse my Katana on my Magus. The down side is it doesn't come into play until 9th level. But I think I found a fix. I recall a magic item which can reduce a weapon from a one handed weapon to a light weapon and a two handed weapon to a one handed weapon. But I can't for the life of me find it. Any one here know the item or have a better idea for now to make this work? I'm working on a very strict 15 point buy so it is dex or str can't have both
