He then selected six of his most powerful opponents and said that he intended to sacrifice them to Odin and Frey, that the people might have good crops. The dismayed chiefs were instantly seized and were offered the alternative of being sacrificed or baptized. Taken by surprise, they were not long in deciding upon the latter, the king making them give hostages for their good faith.
Soon after came the Yuletide and Olaf was present with a strong force at Möre, where the sacrifices were to be made. The peasants also came in force, all armed, with the burly Ironbeard as their leader. They were rude and noisy and it was some time before the king could make himself heard. Then he called on them all to accept baptism and acknowledge Christ the White in place of their bloodthirsty gods. Ironbeard haughtily replied that they were supporters of the old laws and that the king must make the sacrifices as all the kings before him had done.
Olaf heard him through and said that he was there to keep his promise. Then, with many men, he entered the temple, leaving his arms outside as the law required. All he carried was a stout, gold-headed stick. Stopping before the statue of the god Thor, around which were rings of gold and iron, he raised the stick and gave the idol a blow so fierce and strong that it tumbled in pieces from its pedestal. At the same moment his followers struck down the other idols. The peasants, thunderstruck at the sacrilege, looked for support to Ironbeard, but the doughty warrior lay dead. He had shared the fate of the idols he worshipped, being struck down at the same moment with them. What to do the peasants knew not, and when Olaf told them they must either be baptized or fight they chose the former as the safest. The province of Haalogaland, still farther north, was dealt with in the same arbitrary fashion, those of the chiefs who refused baptism being put to death with torture. And in this fierce and bloody way the dominion of Christ the White was established in the land of the vikings. It was but a substitute for the heathen gods that was given them in such a fashion, and years had to pass before they would become true Christians.
Much more might be said about King Olaf, his kindliness and winning manners in peace, his love of show and splendor, his prowess in battle and his wonderful skill with weapons. He could use both hands with equal effect in fighting, could handle three spears at once, keeping one always in the air, and when his men were rowing could run from prow to stern of the ship on their oars. But what we have chiefly to tell is the last adventure of the viking king and how death came to him in the heat of the fray.
What became of his wife Gyda, the Irish princess, we are not told, but he had now a new wife, Thyra, sister of King Sweyn Forkbeard of Denmark, and it was to this queen he owed his death. She had large estates in Wendland and Denmark, from which she now received no revenues, and she fretted Olaf so by appeals, prayers, and tears to win back for her this property that he had no peace in his palace. The annoyance went on until the hot-tempered king could bear it no longer and he began to prepare for war abroad that he might gain peace at home.
Word was sent out to the chiefs of the land, bidding them to join the king with the ships required by the laws of the kingdom. Among his own ships was one called the Short Serpent, and he had just finished another of great size and beauty which he named the Long Serpent. Never had so noble a ship been seen in the north. It was 112 feet long and had 104 oars, while it could carry six hundred warriors, none being over sixty or under twenty years of age except the great bowman Thambarkskelver, who was but eighteen, yet was so skilful with the bow that he could shoot a blunt arrow through a hanging raw ox-hide.
With sixty ships and as many transports Olaf sailed south to Wendland, where he was well received by his old friend King Burislav, whose daughter Geira had been his first wife. The Wend king royally entertained him and made a just settlement of Queen Thyra's estates, and Olaf prepared to sail homeward again. But dark clouds of war were gathering on his path.
Sweyn Forkbeard of Denmark was hostile both to Burislav and Olaf and the king of Sweden was leagued with the Danish king. To detain Olaf while they gathered their fleets, these kings employed Sigvalde, the cowardly chief of the Jomsvikings, who had fled from the battle with Earl Haakon, to visit and lure him into blind confidence.
The treacherous viking succeeded. His smooth, soft ways won Olaf's heart and the open-minded king put complete trust in him. Sigvalde finally, after bringing about much delay by his false arts, engaged to pilot Olaf with his own fleet through the dangerous waters of the coast, and even induced him to divide his ships by sending part of them in advance.
The traitor meanwhile kept in communication with King Sweyn and promised to lure Olaf away from his main force and lead him into the snare they were laying for him. Chief among the enemies of the Norse king was Earl Erik, the son of Earl Haakon, whom he was eager to avenge, and King Olaf the Swede, who was present with a fleet.