like caliburs for instance 2 of them swinging at once would do double damage and u could have a shadow weapon with an elemental weapon at once (ik u probably wouldn't wanna do that one but it was an example)
just u have to own both weapons first is the only catch
there is a problem though and that is : powerful weapons such as DA that would kinda ruin it cause multiplying DA damage by 2 would create an almost unbeatable amount of damage
show what u think about it
We already use both of our hands so this would not work(unless you want to have no shield). Also different swords have different attack speeds and animations that would not work with 2 swords.