Page "Draugr" Paragraph 9
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The resting place of the draugr was a tomb that served much as a workable home for the creature.
Draugar are able to leave this dwelling place and visit the living during the night.
Such visits are supposed to be universally horrible events that often end in death for one or more of the living, which would then warrant the exhumation of the draugr's tomb by a hero.
The motivation of the actions of a draugr was primarily jealousy and greed.
The greed of a draugr causes it to viciously attack any would-be grave robbers, but the draugr also expresses an innate jealousy of the living, stemming from a longing for the things of the life it once had.
This idea is clearly expressed in the Friðþjofs saga, where a dying king declared:
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