All that Danforth has ever hinted is that the final horror was a mirage. It was not, he declares, anything connected with the cubes and caves of those echoing, vaporous, wormily-honeycombed mountains of madness which we crossed; but a single fantastic, demoniac glimpse, among the churning zenith-clouds, of what lay back of those other violet westward mountains which the Old Ones had shunned and feared.– HP Lovecraft, At the Mountains of Madness
Other Names: The Source, the Primal White Jelly, Ur-Shoggoth, God of the Shoggoths, the great gray goo.
If the Original, the Eternal, the Undying has a true name, it is obscured behind vague titles. Few tomes acknowledge the existence of the deity. Those that do only hint at its nature.