like could this shield be done ?

http://i.imgur.com/ETj0ovR.jpg

Yes, but keep in mind that you need written permission from the copyright holders to legally create and release such a mod.

In response to the title: absolutely not.
If you mean, make a shield that looks like that one pictured, absolutely.
If it has any special effects, you'd have to describe them.

That's if you're porting things, if you're just imitating it and creating all assets yourself, I'm pretty sure it's fan-art and you're fine without permission.

no special effects really just 15 durrability protection + 1 and defence +2 but those sats dont exist in Skrim because durra was removed (and TES has never had total durra on items with chance they could be damaged below full) and prot and defence are soemthing else completely

Unless it's owned by Mr. Conglomerate von Moneybags.

To OP: No mods certainly can't be made to do anything. There are very distinct limitations. However, when it comes to modeling specific items, it's pretty open. Yes that shield could be made.