The Old Hag Phenomenon

https://en.m.wikipedia.org/wiki/Night_hag

"The night hag or old hag is the name given to a supernatural creature, commonly associated with the phenomenon of sleep paralysis. It is a phenomenon during which a person feels a presence of a supernatural malevolent being which immobilizes the person as if sitting on their chest or the foot of their bed. The word "night-mare" or "nightmare" was used to describe this phenomenon before the word received its modern, more general meaning.Various cultures have various names for this phenomenon and/or supernatural character."

In Norse mythology, mara, or mare, or, you know, nightmare.

In Japanese mythology, kanashibari, or yume no seirei.

In Thailand, Phi Am.

To the Hmong, dab stag.

Bonus artwork, but blurry. Wish I could find a better copy.

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