
1) Location in Norse mythology
Found on
https://www.crosswordclues.com/clue/niflheim

Niflheim (or Niflheimr) (`Mist Home`, the `Abode of Mist` or `Mist World`){fact|date=April 2012} is one of the Nine Worlds and is a location in Norse mythology which overlaps with the notions of Niflhel and Hel. The name Niflheimr only appears in two extant sources, Gylfaginning and the much debated Hrafnagaldr Óðins. Niflheim was primaril...
Found on
http://en.wikipedia.org/wiki/Niflheim

in Norse mythology, the cold, dark, misty world of the dead, ruled by the goddess Hel. In some accounts it was the last of nine worlds, a place into ... [6 related articles]
Found on
http://www.britannica.com/eb/a-z/n/41
(Nifelheim) Outer region of cold and darkness; abode of Hel.
Found on
http://www.factmonster.com/ipka/A0197623.html

In Norse mythology, Niflheim was a world of ice and darkness centered on an icy spring which existed before creation. As its waters met the fire of the other primeval world Muspell they formed the giant Ymir and started creation.
Found on
http://www.probertencyclopaedia.com/browse/D4.HTM

a place of eternal cold, darkness, and fog, ruled over by Hel: abode of those who die of illness or old age.
Found on
https://www.infoplease.com/dictionary/niflheim
No exact match found.