There is another deity who is described as the calumniator of the gods and the contriver of all fraud and mischief. His name is Loki. He is handsome and well made, but of a very fickle mood and most evil disposition. He is of the giant race, but forced himself into the company of the gods, and seems to take pleasure in bringing them into difficulties, and in extricating them out of the danger by his cunning, wit, and skill. Loki has three children. The first is the wolf Fenris, the second the Midgard serpent, the third Hela (Death), The gods were not ignorant that these monsters were growing up, and that they would one day bring much evil upon gods and men. So Odin deemed it advisable to send one to bring them to him. When they came he threw the serpent into that deep ocean by which the earth is surrounded. But the monster had grown to such an enormous size that holding his tail in his mouth he encircles the whole earth. Hela he cast into Niffleheim, and gave her power over nine worlds or regions, into which she distributes those who are sent to her; that is, all who die of sickness or old age. Her hall is called Elvidner. Hunger is her table, Starvation her knife, Delay her man, Slowness her maid, Precipice her threshold, Care her bed, and Burning Anguish forms the hangings of the apartments. She may easily be recognized, for her body is half flesh color and half blue, and she has a dreadfully stern and forbidding countenance. The wolf Fenris gave the gods a great deal of trouble before they succeeded in chaining him. He broke the strongest fetters as if they were made of cobwebs. Finally the gods sent a messenger to the mountain spirits, who made for them the chain called Gleipnir. It is fashioned of six things, viz., the noise made by the footfall of a cat, the beards of women, the roots of stones, the breath of fishes, the nerves (sensibilities) of bears, and the spittle of birds. When finished it was as smooth and soft as a silken string. But when the gods asked the wolf to suffer himself to be bound with this apparently slight ribbon, he suspected their design, fearing that it was made by enchantment. He therefore only consented to be bound with it upon condition that one of the gods put his hand in his (Fenris's) mouth as a pledge that the band was to be removed again. Tyr (the god of battles) alone had courage enough to do this. But when the wolf found that he could not break his fetters, and that the gods would not release him, he bit off Tyr's hand, and he has ever since remained one-handed. HOW THOR PAID THE MOUNTAIN GIANT HIS WAGES
Once on a time, when the gods were constructing their abodes and had already finished Midgard and Valhalla, a certain artificer came and offered to build them a residence so well fortified that they should be perfectly safe from the incursions of the Frost giants and the giants of the mountains. But he demanded for his reward the goddess Freya, together with the sun and moon. The gods yielded to his terms, provided he would finish the whole work himself without any one's assistance, and all within the space of one winter. But if anything remained unfinished on the first day of summer he should forfeit the recompense agreed on. On being told these terms the artificer stipulated that he should be allowed the use of his horse Svadilfari, and this by the advice of Loki was granted to him. He accordingly set to work on the first day of winter, and during the night let his horse draw stone for the building. The enormous size of the stones struck the gods with astonishment, and they saw clearly that the horse did one-half more of the toilsome work than his master. Their bargain, however, had been concluded, and confirmed by solemn oaths, for without these precautions a giant would not have thought himself safe among the gods, especially when Thor should return from an expedition he had then undertaken against the evil demons.
As the winter drew to a close, the building was far advanced, and the bulwarks were sufficiently high and massive to render the place impregnable. In short, when it wanted but three days to summer, the only part that remained to be finished was the gateway. Then sat the gods on their seats of justice and entered into consultation, inquiring of one another who among them could have advised to give Freya away, or to plunge the heavens in darkness by permitting the giant to carry away the sun and the moon.
They all agreed that no one but Loki, the author of so many evil deeds, could have given such bad counsel, and that he should be put to a cruel death if he did not contrive some way to prevent the artificer from completing his task and obtaining the stipulated recompense. They proceeded to lay hands on Loki, who in his fright promised upon oath that, let it cost him what it would, he would so manage matters that the man should lose his reward. That very night when the man went with Svadilfari for building stone, a mare suddenly ran out of a forest and began to neigh. The horse thereat broke loose and ran after the mare into the forest, which obliged the man also to run after his horse, and thus between one and another the whole night was lost, so that at dawn the work had not made the usual progress. The man, seeing that he must fail of completing his task, resumed his own gigantic stature, and the gods now clearly perceived that it was in reality a mountain giant who had come amongst them. Feeling no longer bound by their oaths, they called on Thor, who immediately ran to their assistance, and lifting up his mallet, paid the workman his wages, not with the sun and moon, and not even by sending him back to Jotunheim, for with the first blow he shattered the giant's skull to pieces and hurled him headlong into Niffleheim.