The gods, knowing none but a magic treasure would suffice for that, bargained for the release of Loki, who departed in quest of the dwarf Andvari, the collector of an immense hoard of gold by magic means. As the wily Andvari could not easily be found, it required all the astuteness of the god of evil to discover him in the guise of a fish at the source of the Rhine, and to catch him by means of the sea-goddess' infallible net. Having the dwarf in his power, Loki wrung from him his huge treasure, his Helm of Dread, or cap of invisibility, and even tore from his very finger a magic ring of gold, thus incurring the dwarf's curse. "For men a curse thou bearest: entangled in my gold, Amid my woe abideth another woe untold. Two brethren and a father, eight kings my grief shall slay; And the hearts of queens shall be broken, and their eyes shall loathe the day. Lo, how the wilderness blossoms! Lo, how the lonely lands Are waving with the harvest that fell from my gathering hands!" Scorning this prediction, Loki hastened to the rescue of his fellow-gods; but, as the otter-skin stretched further and further, it required not only all the treasure, but even the helmet and the serpent ring of gold, to cover it and thus complete the required ransom. The new owner of the treasure now gloated over his gold until his very nature changed, and he was transformed into a hideous dragon. One of his two remaining sons, Fafnir, entering the hut, slew the dragon before he realized it was his father, and then, fascinated by treasure and ring, bore them off to a lonely heath, where in the guise of a dragon he too mounted guard over them. This appropriation of these treasures was keenly resented by his brother Regin, who, unable to cope with the robber himself, now begged Sigurd to help him. Like Mimer in the other version of the tale, Regin was an experienced blacksmith, but, notwithstanding all his skill, Sigurd broke every blade he forged for this task. Finally the young hero hammered out of the fragments of his dead father's blade a weapon which sheared the anvil in two, and could neatly divide a number of fleeces floating down a stream. Properly mounted and armed, Sigurd was guided by Regin to the Glittering Heath, the place where Fafnir guarded his gold. A one-eyed ferry-man (Odin) conveyed the youth across the river, advising him to dig a pit in the track the dragon had worn in his frequent trips to the river to drink. Hidden in this pit--the ferry-man explained--the youth could mortally wound the dragon while he crawled over his head. This advice being too pertinent to be scorned, Sigurd faithfully carried out the plan and slew the dragon, whose fiery blood poured down upon him and made every part of his body invulnerable, save a tiny spot between his shoulders, where a lime-leaf stuck so closely that the dragon blood did not touch the skin.