#kriksy

In Slavic mythology, "Nocnitsa" is the most common name for a nightmare spirit also called plachky, kriksy, mrake and vidine. The name roughly translates as "night hag." In some countries, she is viewed as a type of succubus.

The Nocnitsa is most often said to sit on the chest of sleeping children, draining their life energy. A stone with a hole cut in the centre can protect against the spirit. Some say she is made of shadow.

Image source.

Monster master list.