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Known from 'The King in Yellow' by Robert W. Chambers and later adopted into Lovecraftian mythos, it brings about insanity and despair to those who come in contact with it.

Appears in H.P. Lovecraft's 'The Call of Cthulhu' where its awakening causes madness and chaos among the characters.

Found in Lovecraft's 'The Shadow out of Time', these beings impact the protagonist by exchanging minds across time, exploring themes of identity and knowledge.

This entity comes from Clark Ashton Smith's 'The Tale of Satampra Zeiros' and is incorporated into Lovecraft's mythos, where its slothful and grotesque nature horrifies the characters.

The entity from Lovecraft's story of the same name, which poisons the land and people, causing decay and madness.

Part of Lovecraft's 'The Dunwich Horror', he is the offspring of a human and an eldritch entity, whose presence and actions lead to terrifying events in Dunwich.

Featured in various Lovecraft stories, notably 'The Dream Quest of Unknown Kadath'; impacts characters by spreading madness and despair.

Central in Lovecraft's mythos, referred to in 'The Dream-Quest of Unknown Kadath', where its chaotic nature represents the uncaring and random universe.

A mysterious play within a collection of stories by Robert W. Chambers; it induces despair and insanity in those who read it.

In Lovecraft's 'The Dunwich Horror', it is the progenitor of Wilbur Whateley and has a crucial role in the plot, symbolizing forbidden knowledge and cosmic indifference.

Central to Lovecraft's story 'Dagon' as well as 'The Shadow over Innsmouth', where its influence leads to the transformation of townsfolk and terror for the protagonist.