Sigurd the Dragon Slayer is a legendary hero from Norse mythology, known for his bravery and strength. He is most famous for slaying the dragon Fafnir, who had transformed from a dwarf into a fearsome beast to guard his treasure. Sigurd's victory over Fafnir is a central part of the Völsunga saga, an epic tale that explores themes of heroism, fate, and betrayal. In addition to defeating the dragon, Sigurd is also known for his connection to the Nibelung treasure and his interactions with various characters, including the valkyrie Brünnhilde. His story has inspired numerous adaptations in literature, music, and art, making him a significant figure in both Norse and broader European folklore.