Mordax et al

As I have said before I am hardly an expert on horrorterrors, however I will endeavor to answer as best I can. I have had no personal contact with the entities, however, in my research I know that they are at least partially physical creatures with real bodies, though they exist on a level beyond that as well. 

The horrorterrors are a twisting mass of different creatures, and from what observation there has been, it seems that no two of these creatures are the same. Thus, I would imagine that some of them are slimy, and some of them are dry, or scaled, or furred, or whathaveyou.- physically. However, the impression they give off, one of unknowable *wrongness* I certainly would describe as ‘mentally slimy’; so take that as you will.