Boginki
Region of origin: Poland
Primordial nature spirits, the boginki would mess with humans in ways of varying severity such as ruining fishing nets and spooking cattle to sneaking poisoned vodka into wedding parties and luring men to become lost deep in swamps or drown in water. They are most known, however, for attacking women during or soon after childbirth, and replacing their newborn with a changeling, known as an odmieńce. Boginki are believed to have been created by early gods, and in some versions were once human women who had committed a violent crime or died in childbirth. Tales of swamp- and lake-dwelling boginki are thought to serve as an origin for the rusalka, a water nymph of Slavic mythology.
Originally posted on Tumblr on October 22, 2016
The Compendium of Arcane Beasts and Critters 