Mora

Mora is a malevolent spirit from Slavic folklore that sits on people's chests while they sleep, causing nightmares and sleep paralysis. It's often described as a shadowy female figure with long hair and nails. The name "Mora" is related to the word "moriti" meaning "to torture".

According to legend, Moras are spirits of women who died unnatural deaths. They enter homes through keyholes or cracks and attack sleepers by pressing on their chests. Protection against Moras included placing iron objects near the bed or reciting special prayers before sleep.

The Mora legend represents early Slavic attempts to explain sleep paralysis and nightmares. Similar entities exist in many cultures worldwide, showing how universal this experience is. In modern times, the Mora is often referenced in Slavic horror stories and films.