Sif
;)
was the wife of Thor, the Germanic thunder god, and the mother, by a previous marriage, of Uu, god of archery and skiing. She is the subject of a strange myth in which the trickster Loki, the god of fire, one night cut off her beautiful golden hair, probably a representation of ripe corn and therefore fertility. Next morning Thor was beside himself with rage at Sif's distress. When Loki protested that it was only a joke, Thor demanded to know what he was going to do about it, and the fire god said he would get the dwarfs to weave a wig as a replacement.
So Loki asked the sons of Ivaldi to make a wig from spun gold. The completed piece of work was quite remarkable, for it was so light that a breath of air was enough to ruffle its skeins and so real that it grew on her head by magic. Thinking to get the gods even more into their debt, the sons of Ivaldi used the remaining heat in their furnace to construct a collapsible ship named Skidbladnir for the fertility god Freyr and a magic spear called Gungnir for Odin. On his way back to Asgard, the stronghold of the gods, crossing the underground caverns where the dwarfs lived, Loki also met the dwarf brothers Brokk and Eiti. They were so jealous of the workmanship that had gone into the wig, the boat and the spear that Loki persuaded them to make something better; he even staked his own head on their inability to do so. As a result, the dwarf brothers fashioned the magic hammer known as Mjollnir, the scourge of the frost giants.
The gods were delighted with the treasures Loki and Brokk had brought back. However, Brokk demanded Loki’s head. The gods would not agree, but they had no objection to Brokk sewing up Loki slips with a thong when Thor dragged the god back home after he tried to flee, which caused Loki to plan a revenge against Thor.