Myths of the Norsemen From the Eddas and Sagas
”... Come hither, gentlemen,
And lay your hands again upon my sword;
Never to speak of this that you have heard,
Swear by my sword.”
A distinctive feature of the worship of this god among the Franks and some other Northern nations was that the priests called Druids or Godi offered up human sacrifices upon his altars, generally cutting the bloody- or spread-eagle upon their victims, that is to say, making a deep incision on either side of the back-bone, turning the ribs thus loosened inside out, and tearing out the viscera through the opening thus made. Of course only prisoners of war were treated thus, and it was considered a point of honour with north European races to endure this torture without a moan. These sacrifices were made upon rude stone altars called dolmens, which can still be seen in Northern Europe. As Tyr was considered the patron god of the sword, it was deemed indispensable to engrave the sign or rune representing him upon the blade of every sword—an observance which the Edda enjoined upon all those who were desirous of obtaining victory.
“Sig-runes thou must know,
If victory (sigr) thou wilt have,
And on thy sword’s hilt rist them;
Some on the chapes,
Some on the guard,
And twice name the name of Tyr.”
Lay of Sigdrifa (Thorpe’s tr.). 
Tyr was identical with the Saxon god Saxnot (from sax, a sword), and with Er, Heru, or Cheru, the chief divinity of the Cheruski, who also considered him god of the sun, and deemed his shining sword blade an emblem of its rays.
“This very sword a ray of light
Snatched from the Sun!”
Valhalla (J. C. Jones).
According to an ancient legend, Cheru’s sword, which had been fashioned by the same dwarfs, sons of Ivald, who had also made Odin’s spear, was held very sacred by his people, to whose care he had entrusted it, declaring that those who possessed it were sure to have the victory over their foes. But although carefully guarded in the temple, where it was hung so that it reflected the first beams of the morning sun, it suddenly and mysteriously disappeared one night. A Vala, druidess, or prophetess, consulted by the priests, revealed that the Norns had decreed that whoever wielded it would conquer the world and come to his death by it; but in spite of all entreaties she refused to tell who had taken it or where it might be found. Some time after this occurrence a tall and dignified stranger came to Cologne, where Vitellius, the Roman prefect, was feasting, and called him away from his beloved dainties. In the presence of the Roman soldiery he gave him the sword, telling him it would bring him glory and renown, and finally hailed him as emperor. The cry was taken up by the assembled legions, and Vitellius, without making any personal effort to secure the honour, found himself elected Emperor of Rome.
The new ruler, however, was so absorbed in indulging his taste for food and drink that he paid but little heed to the divine weapon. One day while leisurely making his way towards Rome he carelessly left it hanging in the antechamber to his pavilion. A German soldier seized this opportunity to substitute in its stead his own rusty blade, and the besotted emperor did not notice the exchange. When he arrived at Rome, he learned that the Eastern legions had named Vespasian emperor, and that he was even then on his way home to claim the throne.
Searching for the sacred weapon to defend his rights, Vitellius now discovered the theft, and, overcome by superstitious fears, did not even attempt to fight. He crawled away into a dark corner of his palace, whence he was ignominiously dragged by the enraged populace to the foot of the Capitoline Hill. There the prophecy was duly fulfilled, for the German soldier, who had joined the opposite faction, coming along at that moment, cut off Vitellius’ head with the sacred sword.
The German soldier now changed from one legion to another, and travelled over many lands; but wherever he and his sword were found, victory was assured. After winning great honour and distinction, this man, having grown old, retired from active service to the banks of the Danube, where he secretly buried his treasured weapon, building his hut over its resting-place to guard it as long as he might live. When he lay on his deathbed he was implored to reveal where he had hidden it, but he persistently refused to do so, saying that it would be found by the man who was destined to conquer the world, but that he would not be able to escape the curse. Years passed by. Wave after wave the tide of barbarian invasion swept over that part of the country, and last of all came the terrible Huns under the leadership of Attila, the “Scourge of God.” As he passed along the river, he saw a peasant mournfully examining his cow’s foot, which had been wounded by some sharp instrument hidden in the long grass, and when search was made the point of a buried sword was found sticking out of the soil.
Attila, seeing the beautiful workmanship and the fine state of preservation of this weapon, immediately exclaimed that it was Cheru’s sword, and brandishing it above his head he announced that he would conquer the world. Battle after battle was fought by the Huns, who, according to the Saga, were everywhere victorious, until Attila, weary of warfare, settled down in Hungary, taking to wife the beautiful Burgundian princess Ildico, whose father he had slain. This princess, resenting the murder of her kin and wishing to avenge it, took advantage of the king’s state of intoxication upon his wedding night to secure possession of the divine sword, with which she slew him in his bed, once more fulfilling the prophecy uttered so many years before.
The magic sword again disappeared for a long time, to be unearthed once more, for the last time, by the Duke of Alva, Charles V.’s general, who shortly after won the victory of Mühlberg (1547). The Franks were wont to celebrate yearly martial games in honour of the sword; but it is said that when the heathen gods were renounced in favour of Christianity, the priests transferred many of their attributes to the saints, and that this sword became the property of the Archangel St. Michael, who has wielded it ever since.