Nyarlathotep has MANY forms, over 1000. The best known are the tall black man, a faceless robed figure and the form of a pale creature that appears to be human from a distance and from behind, but the arms are too thick, and the face is a tentacle, I think. This description was from one of Lovecraft's "fragments." I THINK Nyarlathotep was really the creation of Robert Bloch, since most of the Nyarlathotep stories were his.