In Norse mythology, Heimdallr is a god who keeps watch for invaders and the onset of Ragnarök from his dwelling Himinbjörg, where the burning rainbow bridge Bifröst meets the sky. He is attested as possessing foreknowledge and keen senses, particularly eyesight and hearing. In keeping with his guard duties, Heimdallr possesses the resounding horn Gjallarhorn and the golden-maned horse Gulltoppr, along with a store of mead at his dwelling. He is the son of the Nine Mothers, and he is said to be the originator of social classes among humanity. Other notable stories include the recovery of Freyja's treasured possession Brísingamen while doing battle in the shape of a seal with Loki. The antagonistic relationship between Heimdallr and Loki is notable, as they are foretold to kill one another during the events of Ragnarök. In other places of Norse lore, Heimdallr is additionally referred to as Rig, Hallinskiði, Gullintanni, and Vindlér or Vindhlér.
