Koshchei the Deathless is a character from Slavic folklore, often depicted as an evil sorcerer or immortal being. He is known for his ability to evade death, which is tied to a hidden object that contains his soul, making him difficult to kill. This object is typically hidden away, often in a remote location, and is guarded by various magical creatures. In many tales, Koshchei is portrayed as a villain who kidnaps princesses or battles heroes. His stories often involve themes of bravery, cunning, and the quest for immortality. Koshchei's character has appeared in various forms of literature, art, and even modern media, reflecting his enduring presence in Slavic culture.