Baba Yaga

Baba Yaga is a mischevious or pernicious mythical woman in Slavic folklore. She can be considered a witch and spends her time within the forest either helping or hindering those that encounter her (most of the time hindering). She is depicted as being an old woman flying around in a mortar, wielding a pestle and living deep inside the woods within her hut, which stands on chicken legs. Her most faous story is the one where she somewhat helps Vasilisa with her troubles, but at a price of course. Ultimately, Baba Yaga is considered an ambiguous figure in Slavic folklore, and is someone you don't want to anger or be on her bad side.