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Night hag: The night hag is a malevolent supernatural entity linked to the phenomenon of sleep paralysis.

Night hag - Explains historical accounts of sleep paralysis and underlies the origin of the term 'nightmare'.

Night hag

Night hag - Explains historical accounts of sleep paralysis and underlies the origin of the term 'nightmare'.

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the legend in five swipes.

The night hag is a malevolent supernatural entity linked to the phenomenon of sleep paralysis. Often depicted as an old, terrifying woman, she immobilises her victims and induces night terrors. Her legacy is so profound that the modern term 'nightmare' finds its roots in her oppressive visits.

When was the Night hag first written about?

Which books and scrolls describe the Night hag?

Did the Night hag have any weaknesses?

Night hag: Regional Differences in the Legend

Night hag: Parallels in Other Cultures

Where does the Night hag appear in films and games?

Interesting Fact

The term 'nightmare' originally described the night hag’s oppressive visits, providing a direct linguistic link between folklore and the modern understanding of sleep-related phenomena.

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Quick Creature Info

Our Mythic Legendary Rating:

Ethereal Power
Ethereal Power rating

Also Sometimes Known As:

Old Hag

Habitat:

Intermediary space between sleep and wakefulnessNight/dream realmVariousAppears during episodes of sleep paralysisDomestic spaces, particularly bedroomsNear sleeping individuals

Supernatural Powers:

Induces sleep paralysisCauses nightmaresCurses victims

Physical Attributes:

Wrinkled skinAged appearanceMenacing gazeGauntWithered featuresSinister countenance

Abilities:

Manipulates the dream stateUses illusion magicInstills fearSupernatural resilienceUnnatural lifespan

Behavior:

MalevolentPredatory; haunts sleepers, causing terror during sleep

Weaknesses:

Vulnerability to holy artifacts

Lore:

Nightmare inducer and tormentorFolklore and myth; associated with sleep paralysisExplains historical accounts of sleep paralysis and underlies the origin of the term 'nightmare'

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References

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The Mythological Creatures Book Series

Yōkai, Greek, Norse, Egyptian & Chinese. Five illustrated field guides to the creatures the old stories either warned or told you about.

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Curated by the Mythological Creatures Team

Series editor: Mythological Creatures Directory

Primary desk: Northern & European Folklore Desk

(rev. November 2025)