Glámr

Glám is the most terrifying figure in the sagas — the surly Swedish shepherd of Þórhallsstaðir who dies and will not stay dead. A heavy, ill-tempered, irreligious man, he is killed by some malignant thing on the haunted farm one Christmas, and thereafter walks again as a draugr, a corpse-monster of monstrous strength, riding the roofs, killing beasts and men, and driving the farm to ruin. When Grettir the Strong comes to fight him, the two wrestle through the hall in the corpus's greatest scene of supernatural horror — and as Grettir finally overcomes him, the dying Glám fixes him with his corpse-eyes and lays a curse: that Grettir's strength will grow no more, that he will become an outlaw, and that he will forever fear the dark. That curse, more than any enemy, is what destroys Grettir. Glám is the saga world's nightmare made flesh — the dead thing whose dying words doom the living man who beat him.