An analog of this figure from another myth system is Khan Boghu, who dies when the hero Badikan kills seven birds, and this figure often casts a spell that is only reversed by a self-playing lute. In some accounts, this figure was described as the brother of a dragon that guarded the Water of Life and Death and owned either a three-legged or a seven-legged horse; overcoming him involves winning a horse race against him. In the most famous story about this figure, he is tricked by a girl he kidnaps into revealing the hiding place of his most valuable possession, which turns out to be neither inside a broom nor inside of a goat. One story of this figure's demise tells of how he was vanquished 
An analog of this figure from another myth system is Khan Boghu, who dies when the hero Badikan kills seven birds, and this figure often casts a spell that is only reversed by a self-playing lute. In some accounts, this figure was described as the brother of a dragon that guarded the Water of Life and Death and owned either a three-legged or a seven-legged horse; overcoming him involves winning a horse race against him. In the most famous story about this figure, he is tricked by a girl he kidnaps into revealing the hiding place of his most valuable possession, which turns out to be neither inside a broom nor inside of a goat. One story of this figure's demise tells of how he was vanquished by Bulat the Brave and Ivan, who killed this figure for kidnapping Vasilissa, and in most tales, he is overcome by locating an egg inside of a duck inside of a rabbit and breaking that egg. Sometimes seen as the male counterpart to Baba Yaga, for 10 points, identify this antagonist from Slavic myth whose epithet comes from the fact that his soul is not contained in his body but rather in the aforementioned egg.
An analog of this figure from another myth system is Khan Boghu, who dies when the hero Badikan kills seven birds, and this figure often casts a spell that is only reversed by a self-playing lute.
Koshchei [or Kashchei the Deathless; or Kashchei the Immortal]