The being came to Earth from the star Fomalhaut, briefly visiting the planet Yaksh (Neptune) before taking up residence in Mount Yarak, a legendary mountain atop the North Pole.
Though no human cult worships this being, Aphoom-Zhah is revered by the Gnophkeh, the Voormi, and his own race of minions; the spectral Ylidheem.
In Clark Ashton Smith's short story The Seven Geases (1934), Atlach-Nacha is the reluctant recipient of a human sacrifice given to it by the toad-god Tsathoggua.
It dwells within a huge cavern deep beneath Mount Voormithadreth, a mountain in the now vanished kingdom of Hyperborea in the Arctic.
When Chaugnar Faugn hungers, he can move incredibly quickly for his size, and use his lamprey-like "trunk" to drain the blood from any organism he encounters.
The Miri Nigri would later mate with early humans to produce hybrids that would eventually evolve into the horrid Tcho-Tcho people.
In Derleth's version of the Cthulhu Mythos, Cthugha is a Great Old One, an elemental spirit of fire opposed to the Elder Gods.
The being appears as a shapeless, multiform entity with a single arm used for catching those who summoned her, and bringing them a painless, ecstatic death.
It is worshipped exclusively by a blind, troglodyte sect of the Martian race, the Aihai, and can be ritually summoned by the stroking of its idol.
However, the being was first mentioned in Campbell's "The Franklyn Paragraphs" (1973) and "Cold Print" (1969) Eihort lives within a network of tunnels deep beneath the Severn Valley, in England.
It appears as a "bloated blanched oval, supported on a myriad of fleshless legs" with eyes continuously forming in its gelatinous body.
Author Molly Tanzer's novelette "The Infernal History of the Ivybridge Twins" expanded upon Gloon's cult and mythology.
She has the form of a huge tentacled mollusk, with snaking appendages that can spew digestive fluid on things she wishes to eat.
Quachil Uttaus can reduce all living tissue he comes into contact with to dust (and is therefore similar to another of Smith's characters, Ubbo-Sathla).
Rlim Shaikorth appears as a huge whitish worm with a gaping maw, and eyes made of dripping globules of blood.
In its colossal ice-citadel, the White Worm prowls the seas, blasting ships and inhabited land masses with extreme cold.
It is "a great gray thing, a mile long, chanting and exuding strange acids... charging through the depths of the earth at a fantastic speed, in a dreadful fury... melting basaltic rocks like butter under a blowtorch.
"[62] Shudde M'ell is the supreme regent of the chthonians, a horrifying race of burrowing creatures, and is probably the largest and most malignant member of his kind.
Vulthoom appears in the Clark Ashton Smith story of the same name, first published in the September 1935 issue of Weird Tales.
In truth he is a mysterious being, from another universe, exiled by his fellow inhabitants, and lying in wait on Mars in the underground city of Ravormos.
Because of his vast intellect, and advanced technology, he seems godlike, but is in reality merely a very powerful alien who must rest for millennia at a time.
While under the influence of the hallucinogenic perfume of an alien blossom, one man envisioned Vulthoom as a gigantic otherworldly plant, but the being's true form is unknown.
An entity sharing this name, who may or may not be the same Volthoom, appears as a major villain in Geoff Johns' Green Lantern stories.
The worm, to Eibon's horror, was slowly eating away at the vitals of Shaggai and he subsequently made a hasty return to Earth.
[63] Yag-Kosha appeared in the story "The Tower of the Elephant", from Robert Ervin Howard (the creator of "Kull" and "Conan, the Barbarian").
[64] Yba'sokug is a great beast that is said to be come to devour the world, sending depravity before him in the form of his heralds.
Yibb-Tstll is sometimes described as an immobile, dark, tentacled entity with a pulpy, alien head, detached eyes, and large bat wings under which countless Nightgaunts suck black milk from its innumerable breasts.
In return for helping him free his brethren, Zathog promised to give the Zarr the ability to travel through time and space.
His arrival is heralded by the rapid darkening and chilling of the surrounding environment and the sound of flapping, as if produced by very large wings, steadily increasing in volume.
Inside, he found an obsidian tablet and a carving of a hooded, possibly winged, humanoid figure surrounded by toad-like beings prostrate in worship before it.