The god Herindal and Loki once fought a battle in the shapes of seals.
He was the offspring of Loki and the giantess Angurboda, who bore two other children, Midgard the serpent, and Hel the goddess of death.
But the piled-up gold left one hair exposed; in order to cover it Loki returned to Andvari and forced him to surrender a magic ring which had the virtue of breeding gold.
Loki thereupon went back to the stream, where Andvari in the form of a pike was guarding a great treasure, caught him in a net, and forced him to surrender his hoard.
Loki sports quot said.