The game between Njorfe's and Viking's sons culminated in a disagreement, and one of the former nine struck one of the latter a dangerous and treacherous blow. Prevented from taking his revenge then and there by the interference of the spectators, the injured man made a trivial excuse to return to the ball ground alone; and, meeting his assailant there, he killed him. When Viking heard that one of his sons had slain one of his friend's children, he was very indignant, and, mindful of his oath to avenge all Njorfe's wrongs, he banished the young murderer. The other brothers, on hearing this sentence, all vowed that they would accompany the exile, and so Viking sorrowfully bade them farewell, giving his sword Angurvadel to Thorsten, the eldest, and cautioning him to remain quietly on an island in Lake Wener until all danger of retaliation on the part of Njorfe's remaining sons was over. The young men obeyed; but Njorfe's sons, who had no boats to take them across the lake, soon made use of a conjuror's art to bring about a great frost, and, accompanied by many armed men, stole noiselessly over the ice to attack Thorsten and his brothers. A terrible carnage ensued, and only two of the attacking party managed to escape, leaving, as they fancied, all their foes among the dead. But when Viking came to bury his sons, he found that two of them, Thorsten and Thorer, were still alive, and he secretly conveyed them to a cellar beneath his dwelling, where they recovered from their wounds. By magic arts Njorfe's two sons discovered that their opponents were not dead, and soon made a second desperate but vain attempt to kill them. Viking saw that the quarrel would be incessantly renewed if his sons remained at home; so he now sent them to Halfdan, whose court they reached after a series of adventures which in many points resemble those of Theseus on his way to Athens. When spring came Thorsten embarked on a piratical excursion, and encountered Jokul, Njorfe's eldest son, who, in the mean while, had taken forcible possession of the kingdom of Sogn, after killing the king, banishing his heir, Belé, and changing his beautiful daughter, Ingeborg, into the form of an old witch. Throughout the story Jokul is represented as somewhat of a coward, for he resorted by preference to magic when he wished to injure Viking's sons. Thus he stirred up great tempests, and Thorsten, after twice suffering shipwreck, was saved from the waves by the witch Ingeborg, whom he promised to marry in gratitude for her good services. Thorsten, advised by her, went in search of Belé, replaced him on his hereditary throne, swore eternal friendship with him, and, the baleful spell being removed, married the beautiful Ingeborg, who dwelt with him at Framnäs.