Fafnir would go back to the dragon's lair and take all his treasure. Fafnir warned Sigurd that all who possessed the gold would be fated to die, but Sigurd replied that all men must one day die anyway, and it is the dream of many men to be wealthy until that dying day, so he would take the gold without fear. Regin then returned to Sigurd after Fafnir was slain. Corrupted by greed, Regin planned to kill Sigurd after Sigurd had cooked Fafnir's heart for him to eat and take all the treasure for himself. However, Sigurd, having tasted Fafnir's blood
Fafnir while cooking the heart, gained knowledge of the speech of birds and learned of Regin's impending attack from the Oðinnic (of Odin) birds' discussion and killed Regin by cutting off his head with Gram. Sigurd then ate some of Fafnir's heart and kept the remainder, which would later be given to Gudrun after their marriage. Some versions are more specific about Fáfnir's treasure hoard, mentioning the swords Ridill and Hrotti, the helm of terror and a golden coat of chainmail. Fafnir appears – as "Fafner" – in Richard Wagner's epic opera cycle "Der Ring des Nibelungen" (1848–1874), although he began