Yog-Sothoth (The Lurker at the Threshold, The Key and the Gate, The Beyond One, Opener of the Way, The All-in-One and the One-in-All) is a cosmic entity of the fictional Cthulhu Mythos and the Dream Cycle of H. P. Lovecraft. Yog-Sothoth's name was first mentioned in his novella The Case of Charles Dexter Ward (written 1927, first published 1941). The being is said to take the form of a conglomeration of glowing spheres. It is co-terminus with all spacetime, and yet is locked outside of the universe we inhabit. Supposedly, Yog-Sothoth knows all and sees all, surpassing even Yibb-Tstll in wisdom. To "please" this deity could bring knowledge of many things. However, like most beings in the mythos, to see it or learn too much about it is to court disaster. Some authors state that the favor of the god requires a human sacrifice or eternal servitude.