Garm

Garm (Garmr) is the blood-marked hound that guards the gate to the Norse underworld, whose baying at Gnipahellir is counted among the signs of Ragnarok and who is fated to kill, and be killed by, the god Tyr. Garm, or Garmr in Old Norse, is the great hound of Norse mythology, chained before Gnipahellir, the cave mouth that opens onto the underworld realm ruled by the goddess Hel.

When the appointed battle comes, Garm breaks free of his bonds and meets the god Tyr; the two kill each other in single combat, one casualty among the paired duels that close out the mythology's central gods against their monstrous opposites, alongside Odin against Fenrir and Thor against Jormungandr.

Garm (Garmr) is the blood-marked hound that guards the gate to the Norse underworld, whose baying at Gnipahellir is counted among the signs of Ragnarok and who is fated to kill, and be killed by, the god Tyr. Garm, or Garmr in Old Norse, is the great hound of Norse mythology, chained before Gnipahellir, the cave mouth that opens onto the underworld realm ruled by the goddess Hel.

Eddic sources describe him as blood-stained about the chest and, in one formula, as the finest of dogs — a guardian figure stationed at a threshold rather than a free-ranging monster.