Skofnung, also known as the Blood River, is designated as the bride-price for the wedding of Thrym and Sam. Arvid – One of Gellir's protectors. Dagfinn – Gellir's secretary. Knut – One of Gellir's protectors. Dwarves (Svartalfar) – A race of Norse Dwarves that live in Nidavellir. The dwarves, like humans, are mortals, though they cannot live in a world with sunlight, as it turns them to stone. This process can be reversed with running water. They are a matriarchal society and generally have an appreciation for crafting and inventions, naming each and every one of them. The dwarves believe they are descended from maggots, which explains why they prefer to live underground. Andvari – A dwarf who lives in Alfheim in the form of a fish. He holds a ring that can give its wielders immense wealth, yet will inflict a curse that robs them of all of their sanity and brings out their worst aspects. Fjalar and Galar – Trickster dwarves who operate a boat that leads to the prison of Fenris Wolf. Anyone who barters with them usually end up stranded on the island. Junior – A grumpy old dwarf who hates Blitz for shaming his father, who built Fenris Wolf's prison. He challenges him to a smithing challenge before he gives him Andskoti and jewelry for Freya. He fails because of Sam's intervention, but Blitz decides not to execute Junior. Junior is more than 500 years old. Nabbi – A bartender in Nidavellir. He is also one of the members of a jury for Blitz and Junior's smithing challenge. Elves (Ljosalfar) – "Traditional" elves who live in the idyllic world of Alfheim. They are once connected with nature and magic, but over time, their connection vanished and now they are ordinary mortals like humans. They greatly respect Frey, their ancestral master. Alderman – Hearth's cold, vain, and abusive father. He prefers his other son, Andiron, over Hearth, and when the former died, he forced Hearth to collect blood tax to pay for Andiron's death, leading the latter to run away from home. He is given Andvari's cursed ring to complete the tax, which causes him to exhibit the worst of his vain nature. By the third book, the ring has transformed Alderman into a ring dragon who lives in a cave near the well where Andiron died. Magnus manages to stab and kill him, allowing him,