I'm not sure how it works, exactly, but they're solid as long as I exercise any control over them. As for if they can conduct electricity or not, there's one way to find out, though I would expect them to vanish the moment they do—light shining onto a shadow would likely erase it, after all. [He did see how that big one just moments ago had disappeared after it was struck directly. But, if the shadows could be used as a temporary line despite that...

They'll have an opportunity to test it soon enough, it seems, as another wave of the creatures begins to approach, most of them directing their attention toward Desi.]