User blog comment:Mythicdusk/Possible Skyrim DLC?/@comment-3157507-20120123205526/@comment-4644719-20120125200721

I did notice that when I was fighting. My mage playthrough kept coming across invisible Stormcloaks. The only way I beat them was keeping up Atronachs (who could see the enemies) and by using Ebonyflesh and a Lightning Cloak, Close Wounds when necessary.