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 fictional character in the 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 bubbles. Mythos summary Imagination called up the shocking form of fabulous Yog-Sothoth — only a congeries of iridescent globes, yet stupendous in its malign suggestiveness. —H. P. Lovecraft, "The Horror in the Museum" Yog-Sothoth is an Outer God and is coterminous with all time and space yet is supposedly locked outside of the universe we inhabit. Its cosmic nature is hinted at in this passage from "Through the Gates of the Silver Key" (193