Niflheim is the primordial realm of ice and fog whose spring Hvergelmir feeds every river in the nine worlds.
At a glance
- Old Norse
- Niflheimr
- Meaning
- "World of Mist" or "Fog Home"
- Type
- Primordial realm of ice and fog
- Ruler
- None named in the sources
- Spring
- Hvergelmir, source of the world's rivers
- Notable dweller
- The dragon Nidhogg, gnawing at the root above
- Connects
- Muspelheim, Helheim, Ginnungagap, Nine Realms
- Sources
- Poetic Edda, Prose Edda
Niflheim is the primordial realm of ice and fog, one of the two worlds that existed before Midgard and the rest of creation took shape. At its heart lies Hvergelmir, the roaring spring that feeds every river in the nine worlds, and its cold, unlike Muspelheim's fire, is the raw material the gods later shaped into everything else.
What it is
The Poetic Edda places Niflheim to the north, a realm of cold, darkness, and fog that existed alongside Muspelheim's fire before Ginnungagap was ever filled. Where Muspelheim burns, Niflheim freezes, and the two together frame the void in which the first living things took shape. Snorri Sturluson's Prose Edda calls it simply "the grim and dreadful place," a description that has stuck to it ever since.
Hvergelmir, source of all rivers
At Niflheim's centre lies Hvergelmir, a spring so central to the cosmology that Grimnismal names it the origin of every river in the nine worlds. Its icy waters, called the Elivagar, flow outward and freeze into layers of rime as they travel.
| River | Note |
|---|---|
| Elivagar ("Ice waves") | The general name for the rivers flowing from Hvergelmir, freezing into rime as they run |
| Gjoll | Marks the border of Helheim, crossed by the bridge Gjallarbru |
| Slidr | Named among the rivers said to run through the world of men, per Grimnismal |
| Fimbulthul | One of the rivers said to flow near the gods' seats |
Fire meets ice: the birth of Ymir
Niflheim's ice did not stay still. Rime spreading out from Hvergelmir drifted across the void of Ginnungagap and met the heat and sparks blown outward from Muspelheim. Where the two met, the ice began to melt and drip, and the first living shape stirred into being from the meltwater: the giant Ymir, ancestor of all the frost giants.
Nidhogg at the root
One of Yggdrasil's three roots reaches down toward Niflheim and Hvergelmir, and there the dragon Nidhogg gnaws at it without rest. The Poetic Edda pictures Nidhogg among the dead as much as among the ice, feeding on corpses as well as on the root itself, a detail that ties Niflheim's cold directly to the fate of the dead elsewhere in the cosmology.