Siegfried to defeat his enemies the Saxons and Danes. Eventually, Gunther offers to allow Siegfried to marry Kriemhild if Siegfried first helps him woo the queen of Iceland, Brunhild. Brunhild has set various martial and physical challenges that any suitor must accomplish, or else she will kill him. Siegfried uses his cloak of invisibility (Tarnkappe) to allow Gunther to accomplish each challenge, and Brunhild is forced to marry Gunther. She refuses, however, to sleep with Gunther on her wedding night, tying him up and hanging him from a hook. Gunther again enlists Siegfried's help, who takes Gunther's shape and overpowers Brunhild so that Gunther can then sleep with her. Some time later, Kriemhild and Brunhild quarrel, and Kriemhild tells Brunhild that Siegfried and not Gunther took her virginity. Brunhild complains to Gunther, who causes Siegfried to publicly swear that this is not true. Brunhild and Gunther's vassal Hagen, however, are not satisfied, and convince Gunther to have Siegfried murdered while on a hunt. Hagen kills Siegfried, taking possession of his sword Balmung, and later arranges to steal the hoard of the Nibelungs that rightfully belongs to Kriemhild as Siegfried's widow. After some time, Kriemhild is persuaded to be reconciled with Gunther, but not with Hagen. After she has been married to King Etzel (Attila) of the Huns, she invites her brothers to visit, plotting revenge. Gunther accepts this invitation despite Hagen's warning, and the Burgundians trek from Worms to Etzelburg (Buda). Gunther can be said to play a secondary role to Hagen in the conclusion of the Nibelungenlied. When fighting begins, Gunther fights bravely. When only he and Hagen are left alive, Dietrich von Bern defeats and captures the two after his offers to surrender are rejected. Told by Hagen that he will only reveal the location of the hoard of the Nibelungs once Gunther is dead, Kriemhild has her brother beheaded. Þiðrekssaga Although the Þiðrekssaga (c. 1250) is written in Old Norse, the majority of the material is translated from German (particularly Low German) oral tales, as well as possibly some from German written sources such as the Nibelungenlied. Therefore, it is included here. Gunnar (Gunther) is a king of the Niflungs who live in northern Germany at Niflungaland, with a capital at Verniza (Worms). He is the son of King Aldrian and Queen Oda and brother of Grimhild (Kriemhild), Gernoz (Gernot), and Gisler (Giselher), and half-brother of Högni