reminds me of these Wolverine Claws (although it would require some work to finish it or rather a talented artist )
not only a form, it would have stats like a weapon = AP, AC, DX, refining for more AP, set bonus for wielding both claws, ...
so you would have to sacrifice DP and MD of a shield
i was working on others too (dual alt crimson sword, dual naked blade sword, dual holy christmas axe ...)
and some really weird stuff
I've actually also been working on some dual-wielding stuff!
However, if you try to use these in-game, your character would hold the Shield side really weird, so it seems that you need to know the direct placement of the Shield item to make it properly look like you're holding it, then when your character starts to attack, you need to have it move drastically so that it moves with your character (because they raise their arms and everything.) But then, you also have the issue that some characters differ in their movement and shield movement, so it's a really tough thing to create!
But if we could get to the point where it could be done, or have one successfully made, then we could make a lot based off the first one, and bring in a whole new set of ideas, which would be awesome!