Appearance/discussion of Necropolis units.

I'm puzzled by such a terrible thing as the "smoke" around the ghost dragons... what is that black smoke around the skeleton?... it looks like something from Erunda, maybe the authors meant that it's negative energy and evil swirling around? And the green plague around zombies and skeletons is just ridiculous! And the fog coming from under the Death Herald's robe? Is he a teapot, that steam is coming out from under him? But in general, the units are well-designed and made quite well. My rating is 4+ or 5-.