The hero, however, doomed to press on in quest of further adventures, soon left Brynhild in the castle where he had found her, still protected by the barrier of flame, and rode off to Burgundy, the land of the Niblungs. Here reigned Guiki, whose fair daughter Gudrun once dreamt that a falcon, after hovering for some time over her house, nestled in her bosom, which she soon beheld dyed red by its life-blood. Disturbed by this ominous dream, Gudrun visited Brynhild and besought her interpretation, only to learn she would marry a king who would in time be slain by his foes.
Shortly after this occurrence, Sigurd reached the land of the Niblungs and challenged Gunnar, brother of Gudrun, to fight. But, rather than cross swords with the slayer of a dragon, Gunnar offered the stranger his hand in friendship and sent for his sister to give him the cup of welcome. While sojourning here with the Niblungs, Sigurd distinguished himself by athletic feats and, when war broke out, by conquering their foes. These proofs of strength and daring captivated the heart of Gudrun, who, seeing Sigurd paid no attention to her, finally prevailed upon her mother to give her a love potion, which she offered to him on his return from one of his adventures.
"He laughed and took the cup: but therein with the blood of the earth
Earth's hidden might was mingled, and deeds of the cold sea's birth,
And things that the high gods turn from, and a tangle of strange love,
Deep guile, and strong compelling, that whoso drank thereof
Should remember not his longing, should cast his love away,
Remembering dead desire but as night remembereth day."
No sooner has this potion been quaffed than our hero, utterly oblivious of earlier promises to Brynhild, sued for Gudrun's hand, and was promised she should be his bride if he helped Gunnar secure Brynhild.
In behalf of his future brother-in-law—whose form he assumed—Sigurd once more rode through the flames, and, although haunted by vague memories of the past, wrested from Brynhild the magic betrothal ring he had given her, and claimed her as bride. Compelled by fate to wed any man who rode through the flames to claim her, Brynhild reluctantly obeyed Sigurd—whom she did not recognize—and was duly married to Gunnar, king of the Niblungs. But, on perceiving Sigurd at his court, she vainly strove to make him remember her and his vows, and was filled with bitter resentment when she perceived his utter devotion to Gudrun, his present bride.
Meantime, although Gunnar had secured the wife he coveted, he was anything but a happy man, for Brynhild would not allow him to approach her. Sigurd, to whom he finally confided this unsatisfactory state of affairs, finally volunteered to exert his fabulous strength to reduce to obedience the rebellious bride, whom he turned over to his brother-in-law in a submissive mood, after depriving her of her girdle and ring, which he carried off as trophies and gave to Gudrun.
Brynhild's resentment, however, still smouldered, and when Gudrun, her sister-in-law, attempted to claim precedence when they were bathing in the river, she openly quarrelled with her. In the course of this dispute, Gudrun exhibited the magic ring, loudly proclaiming her husband had wooed and won Gunnar's bride! Two distinct parties now defined themselves at court, where Högni, a kinsman of the Niblungs, vehemently espoused Brynhild's cause. By some secret means—for his was a dark and tortuous mind, ever plotting evil—Högni discovered the trick of the magic potion, as well as Brynhild's previous wooing by Sigurd, and proposed to her to avenge by blood the insult she had received.
According to one version of the tale, Högni, who discovers in what spot Sigurd is vulnerable, attacks him while he is asleep in bed and runs his lance through the fatal spot. The dying Sigurd therefore has only time to bid his wife watch over their children ere he expires. By order of Gudrun, his corpse is placed on a pyre, where it is to be consumed with his wonderful weapons and horse. Just as the flames are rising, Brynhild, who does not wish to survive the man she loves, either plunges into the flames and is consumed too, or stabs herself and asks that her corpse be burned beside Sigurd's, his naked sword lying between them, and the magic ring on her finger.
"I pray thee a prayer, the last word in the world I speak,
That ye bear me forth to Sigurd and the hand my hand would seek;
The bale for the dead is builded, it is wrought full wide on the plain,
It is raised for Earth's best Helper, and thereon is room for twain:
Ye have hung the shields about it, and the Southland hangings spread,
There lay me adown by Sigurd and my head beside his head:
But ere ye leave us sleeping, draw his Wrath from out the sheath,
And lay that Light of the Branstock and the blade that frighted Death
Betwixt my side and Sigurd's, as it lay that while agone,
When once in one bed together we twain were laid alone:
How then when the flames flare upward may I be left behind?
How then may the road he wendeth be hard for my feet to find?
How then in the gates of Valhall may the door of the gleaming ring
Clash to on the heel of Sigurd, as I follow on my king?"
Another version of the tale relates that Sigurd was slain by Högni while hunting in the forest, as the story runs in the Nibelungenlied. Next we are informed that the king of the Huns demanded satisfaction from Gunnar for his sister Brynhild's death, and was promised Gudrun's hand in marriage. By means of another magic potion, Sigurd's widow was induced to marry the king of the Huns, to whom she bore two sons. But, when the effect of the potion wore off, she loathed this second marriage and dreamed only of avenging Sigurd's death and of getting rid of her second spouse.