1) Cthulhu Mythos deity 
Byatis (the Serpent-Bearded) is a fictional deity in the Cthulhu Mythos. The Great Old One was first mentioned in Robert Bloch`s short story `The Shambler From the Stars`, originally published in the September 1935 issue of Weird Tales. It plays a central role in Ramsey Campbell`s 1964 short story `The Room in the Castle`. ==Summary== In Blo...