This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Muma Padurii (Romanian folklore)
In Romanian folklore, Muma Padurii is an ugly and mischievous or mad old woman living in the forest. She is also the protector of the animals and plants, brewing potions and helping injured animals. She cures the forest if it is dying and she keeps unwanted trespassers away by driving them mad and scaring them.
Muma Padurii is a spirit of the forest in a very ugly and old woman's body. Sometimes she has the ability to change her shape. She lives in a dark, dreadful, hidden little house. This (step-) mother of the forest kidnaps little children and enslaves them. In one popular story, at some point, she tries to boil a little girl alive in a soup.