Page "Draugr" Paragraph 5
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Draugar also have the ability to curse a victim, as shown in the Grettis Saga where Grettir is cursed to be unable to become any stronger.
While the draugr certainly preferred to be active during the night, it did not appear to be vulnerable to sunlight like some other revenants.
The draugr could also move magically through the earth, swimming through solid stone as does Killer-Hrapp:
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