According to the story of Vasilisa, to defeat Baba Yaga, you must be able to complete the tasks given to you by Baba Yaga. In this way, she is said to abide by your initial request. However, according to the story of Ivan, you must blow 3 horns collected from Baba Yaga; one is blown softly, the second a bit louder, and the last, the loudest.