Andvaranaut is a magical ring from Norse mythology, specifically associated with the legend of Sigurd and Fafnir. The ring has the power to bring wealth to its owner but also brings misfortune and greed. It was originally owned by the dwarf Andvari, who cursed it after it was stolen. The story of Andvaranaut highlights themes of greed and the consequences of wealth. After Sigurd acquires the ring, it leads to tragic events, including betrayal and death, illustrating how the desire for riches can corrupt and destroy relationships.