When Regin sees the dragon safely dead, he creeps from his place of concealment, drinks of the blood, and, cutting out the heart, begs Sigurd to roast it for him. While doing so, Sigurd burns his fingers, and, putting them in his mouth, understands at once the language of the birds and hears them say that Sigurd himself should eat the heart and then he would be wiser than all other men. They also betray Regin's evil designs, and counsel the lad to kill his tutor. This Sigurd then does, cutting off Regin's head, drinking the blood of both brothers, and eating Fafnir's heart. (3) On the further advice of the birds Sigurd first fetches the treasure from the cave, and then journeys to the mountain "Hindarfjall", where he rescues the sleeping Valkyrie, "Sigrdrifa" ("Brynhild", "Brunhild"), who, stung by the sleep thorn of Wodan, and clad in full armor, lies asleep within a castle that is surrounded by a wall of flame. With the help of his steed Grani, Sigurd succeeds in penetrating through the fire to the castle. The sleeping maiden awakes when he cuts the armor from her with his sword, for it was as tight as if grown fast to the flesh. She hails her deliverer with great joy, for she had vowed never to marry a man who knew fear. At Sigurd's request she teaches him many wise precepts, and finally pledges her troth to him. He then departs, after promising to be faithful to her and to remember her teachings. On his journeyings Sigurd soon arrives at the court of "Giuki" (the Norse form of the German "Gibicho", "Gibich"), a king whose court lay on the lower Rhine. Giuki has three sons, "Gunnar", "Hogni", and "Gutthorm", and a daughter "Gudrun", endowed with great beauty. The queen bears the name of Grimhild, and is versed in magic, but possessed of an evil heart. (4) Sigurd is received with great honor, for his coming had been announced to Gudrun in dreams, which had in part been interpreted to her by Brynhild. The mother, knowing of Sigurd's relations to the latter, gives him a potion which produces forgetfulness, so that he no longer remembers his betrothed, and accepts the hand of Gudrun, which the king offers him at the queen's request. The marriage is celebrated with great pomp, and Sigurd remains permanently attached to Giuki's court, performing with the others many deeds of valor.