Heard of the Nattmara?
In Scandinavia, there was the Nattmara. The Mara (or, in English, "nightmare") appears as a skinny young woman, dressed in a nightgown, with pale skin and long black hair and nails. After turning into sand, they could slip through the slimmest crack in the wood of a wall and terrorize the sleeping by "riding" on their chest, thus giving them nightmares. (This appears to describe "apparitions" commonly seen and/or felt during episodes of sleep paralysis.) The Mara traditionally rode on cattle, which would be left drained of energy and with tangled fur at the Mara's touch. Trees would curl up and wilt at the Mara's touch as well. In some tales, like the Banshee, they served as an omen of death. If one were to leave a dirty doll in a family living room, one of the members would soon fall ill and die of tuberculosis. ("Lung soot", another name for tuberculosis, referred to the effect of proper chimneys in 18th through 19th century homes. Inhabitants would therefore contract diseases due to inhaling smoke on a daily basis.)
There was some discrepancy as to how they came into being. Some stories say that the Maras are restless children, whose souls leave their body at night to haunt the living. Another tale explains that if a pregnant woman pulled a horse placenta over her head before giving birth, the child would be delivered safely; however, if it were a son, he would become a werewolf, and if a daughter, a Mara.
There was some discrepancy as to how they came into being. Some stories say that the Maras are restless children, whose souls leave their body at night to haunt the living. Another tale explains that if a pregnant woman pulled a horse placenta over her head before giving birth, the child would be delivered safely; however, if it were a son, he would become a werewolf, and if a daughter, a Mara.
