Sigurd requested Regin, who was the best of smiths, to forge him a sword. Two were made, but both broke at the first stroke. The broken pieces of Gram were then obtained, and out of them Regin forged a blade that clave the anvil in the smithy, and cut a lock of wool borne down to it by a stream. Armed with Gram, and mounted on Gran, his steed, which Odin had instructed him to choose, Sigurd rode to the Glistening Heath, dug a pit in the dragon's path, and slew him as he passed over him on his way to drink at the river. Sigurd roasted the heart of Fafnir; and while it was being cooked, he tried it with one of his fingers to see if it were soft. The hot roast burned his finger, which caused him to put it to his mouth. He tasted the dragon's blood, and instantly he understood the songs of birds. Sigurd slew Regin, ate the heart, rode on Gran to Fafnir's lair, took the spoil, and escaped with it. On and on he rode, till on a lone fell he saw a flame; and when he reached it, it blazed all around a house. No horse but Gran could pass through that flame, and no man but Sigurd could guide him in his fiery path. Brynhildr, Atli's sister, who in consequence of giving victory on the wrong side had the thorn of sleep thrust into her cloak by Odin, lay in the house in a deep sleep. She was under a curse to slumber there until a man bold enough to ride through the fire came to liberate her, and win her for his bride. Dashing onward to where the fair maiden lay, his first touch wakened her from the long sleep to which the cruel god had consigned her. They swore with a mighty oath to love each other, and she taught him runes and wisdom.