DIMENSIONAL SHAMBLER
"Shuffling toward him in the darkness was the gigantic, blasphemous form of a black thing not wholly ape and not wholly insect. Its hide hung loosely upon its frame, and its rugose, dead-eyed rudiment of a head swayed drunkenly from side to side. Its fore paws were extended, with talons spread wide, and its whole body was taut with murderous malignity despite its utter lack of facial expression."
"Coward—you could never face the dimensional shambler whose hide I put on to scare you—the mere sight of it alive, or even the full-fledged thought of it, would kill you instantly with fright! Iä! Iä! It waits hungry for the blood that is the life!”
H.P. Lovecraft & Hazel Heald, The Horror In the Museum