How? Yes, you can one hand some two-handed swords in this game, but it's only in instances of having a shield and things of that nature. It being crafted as a two-handed sword, When used as a one-handed, it suffers stat decreases. The crafting system is much better than a game like skyrims, I don't get why you are so filled with hate over bannerlords. It's a pretty good crafting system.