Andvari

In Norse mythology, Andvari was a dwarf who lived underneath a waterfall and had the power to change himself into a fish at will. He had a magical ring named Andvarinaut, which helped him become wealthy.Using a net provided by Ran, Loki caught him as a trout and forced him to give up his gold and Andvarinaut. Andvari cursed Andvarinaut to destroy whoever possessed it. After the deaths of Brynhild (Brünnehilde) and Sigurd (Siegfried), Gunnar (Gunther) left Andvari's gold in a cave. Years later, Andvari discovered the cave and his lost gold, although his ring was lost forever.
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Noun
1. (Norse mythology) a dwarf who possessed a treasure that was stolen by Loki
(hypernym) gnome, dwarf
(classification) Norse mythology

[Norse] In Norse mythology, Andvari is a dwarf who can assume the shape of a fish if he is pursued. He lives underneath a waterfall and collects great wealth with the help of his ring Andvaranaut. He was caught by Loki with a net provided by the goddess Ran and forced the yield all the gold he possessed. The dwarf tried to withhold his ring so that he could rebuild his wealth. Loki made him give up the ring as well and the dwarf cursed the stolen gold which would from then on bring disaster to all who owned it. The gold was used by the gods to pay a blood-debt to pay Hreidmar, the father of Fafnir, because they had killed his son Otter. This myth formed in later times the prelude to the Nibelungsaga.

Andvari (Icelandic) [from and spirit + vari watcher, guardian] In Norse mythology, a dwarf, owner of the treasure around which center the complex events related in the Nibelungen cycle. This gold has a twofold meaning and a markedly twofold effect on the various protagonists who covet it. See also FAFNIR