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A fictional town in Massachusetts where the inhabitants have become hybrid creatures, detailed in 'The Shadow Over Innsmouth'.

Referred to as 'The Blind Idiot God', this entity is the chaotic and mindless center of the universe, mentioned in 'The Dreams in the Witch House'.

An ancient cosmic entity with a priest-like status among the Old Ones, characterized by a large, octopus-like head. Appears in 'The Call of Cthulhu'.

An ancient and scientifically advanced extraterrestrial species portrayed in 'At the Mountains of Madness', known for creating the shoggoths.

A fictional grimoire of arcane knowledge and eldritch spells, created by Lovecraft and mentioned in many of his stories like 'The Dunwich Horror'.

A creature that is a sea-deity with connections to the Deep Ones, featured prominently in the eponymous short story 'Dagon'.

An important fictional institution in the Mythos that hosts a collection of rare texts including the Necronomicon, as seen in stories like 'At the Mountains of Madness'.

A race of beings with vast knowledge and the ability to travel through time by swapping minds with other beings, featured in 'The Shadow Out of Time'.

A species of fungoid, crustacean-like extraterrestrials that perform interstellar travel using a special device, from the story 'The Whisperer in Darkness'.

A strange extraterrestrial entity of pure color that drains life and mutates living creatures, as depicted in the story of the same name.

A shape-shifting entity known as 'The Crawling Chaos', it serves as a messenger for the Outer Gods and appears in 'The Dream-Quest of Unknown Kadath'.

An all-knowing cosmic entity that embodies time and space, mentioned in 'The Dunwich Horror' and 'Through the Gates of the Silver Key'.

A fictional rural town in Massachusetts, known for its connection to the Whateley family and strange occurrences in 'The Dunwich Horror'.

A fictional town in Massachusetts, an important setting in the Lovecraft Mythos that first appeared in 'The Picture in the House'.