Hermod, in Norse mythology, messenger of the gods. He was a son of the principal god, Odin, and his wife, Frigg. Known as Hermod the Swift, he was called upon by the other gods when they had a task requiring speed and urgency. Hermod wore a helmet and coat of mail given to him by Odin, and he always carried Gambantein, his magic wand or staff. He was also called Hermod the Bold, as he was courageous in war and loved a good fight. The Vikings believed that he would be waiting, along with Odin, at the entrance to Valhalla to welcome the Einherjar, warriors who had died valiantly in battle. Hermod appears in both the 'Poetic (or Elder) Edda' and the 'Prose (or Younger) Edda'. It was Hermod who volunteered to ride all the way from the heights of heaven, Asgard, down to Hel in an attempt to ransom his brother Balder from the queen of the underworld (also named Hel). It took him nine days, riding Odin's steed, Sleipnir, the fastest horse in the world, to reach the river Gjol (also spelled Gioll or Gjoll). There he met Modgud (or Modgudr), the maiden who guarded the bridge. She asked him why someone who was not yet dead would want to cross the river to Hel, and she told him that his brother had indeed passed that way.
Hermod then came to the huge, locked iron Hel Gate. Hermod led Sleipnir in a giant leap over the gate. Once inside, Hermod tried to convince Hel that Balder should be returned to the world of the living, because his death had caused so much grief. Hel agreed to allow Balder to go back to Asgard if all things in the world, alive and dead, wept for him, but if one single thing refused to weep, Balder would have to stay in the underworld.
Hermod rode the long journey back to Asgard and told the gods what Hel had demanded. The gods sent messengers to every corner of the world with the news, and everything wept, except for a giantess named Thokk, who was thought to be the evil trickster god Loki in disguise. So Balder had to remain in the underworld.
On another occasion, Odin was disturbed by prophecies and called on Hermod to ride to the land of the Finns to see Rossthiof (horse thief). Odin again lent Hermod his swift horse, Sleipnir, and also gave him his runic staff. Hermod hurried off, and though Rossthiof conjured up monsters to stop him, Hermod subdued Rossthiof and refused to free him until he had answers to Odin's forebodings. Rossthiof agreed, and Hermod freed him. Rossthiof began to mutter incantations, and immediately the sun hid behind clouds, the earth trembled, and storm winds rose. Rossthiof pointed to the horizon and there Hermod saw a huge stream of blood flooding the ground. A beautiful woman appeared with a boy beside her. This child grew to full height, carrying a bow and arrows, before Hermod's eyes. Rossthiof said the blood meant the murder of one of Odin's sons, but if Odin wooed and won the giantess Rind (or Rinda) in the land of the Ruthenes (Russia), she would bear him a son who would come to full growth within a day and avenge his brother's death.
Hermod rushed back to Odin and told him the portent. As a result, Odin sought out Rind, who became the mother of his son Vali. The prophecy was fulfilled with the death of Balder (see Baldr's Death), when Vali slew Hod to avenge him.