|Map||Basic Data||Planetary Image|
|Segmentum:||Segmentum Solar[Conflicting sources]|
|Class:||Adeptus Astartes Homeworld, Feral World, Death World|
|Tithe Grade:||Solutio Exceptius[7a]|
- During the Dark Age of Technology: Fenris is colonized by Humanity. The Emperor described the world as a "relic from before the days of Old Night".[10a] The planet proves difficult for the colonizers, who scrap their vessels in order to build shelters.
- During the Age of Strife: Fenris regresses to a pre-industrial state.[10a]
- M30: Leman Russ arrives on Fenris and is raised by a She-Wolf before being taken in by its inhabitants. He eventually manages to become King of Fenris before the Emperor arrives. Fenris joins the Imperium and Russ takes part in the Great Crusade.
- M31: Russ goes missing on Fenris after the Horus Heresy.
- M32: Battle of the Fang — Fenris was attacked by the Thousand Sons as revenge for the Burning of Prospero;
- Plague of Unbelief — Fenris was the last planet attacked by Cardinal Bucharis in his conquest of a minor empire;
- 444.M41: Months of Shame — The dispute between the Inquisition and Space Wolves after the First War for Armageddon culminated in a short battle in orbit over the planet.
- 641.M41: Fenris is raided by a collection of Dark Eldar Kabals led by Duke Traevelliath Sliscus and his warband, the Sky Serpents. The Dark Eldar were driven off with significant losses but managed to capture a number of tribesmen and Space Wolf aspirants from Asaheim as slaves.[13b][13c]
- 886.M41: Fenris Incident — The Ecclesiarchy arrives at Fenris to try and confirm if the Space Wolves worship false gods. The attempt provokes a war that lasts three weeks.
- 999.M41: Siege of the Fenris System — As the entire Fenris System is assailed by Chaos forces, Fenris itself is bombarded by a Dark Angels-led coalition. Ultimately much of the world is subjected to a massive Thousand Sons and Daemonic invasion led by Magnus himself before the Space Wolves under Logan Grimnar triumph. Much of Fenris' tribal population is liquidated by the Ordo Malleus in the aftermath for witnessing a Daemon Primarch.
- M42: The Fang is unsuccessfully raided by the Haemonculus Khaeghris Xhakt.
A planet of fire and ice, Fenris orbits its sun once every 3-4 Terran years. During the summer months volcanoes erupt, burning great areas with lava flows and churning the seas, spreading great floods and tidal waves. As the planet enters its long winter, the temperature drops so far that most of it actually ices over, giving the planet the appearance of a snowball from orbit.[Needs Citation]
Apart from a single area of the planet that is permanently land-locked, Fenris is a world of shifting geography and mostly oceans. Numerous asteroid strikes, mutable coastlines and even swiftly risen or sunk island masses have resulted in the population becoming one of largely nomadic barbarian tribes. The tribes constantly seek secure territory, and as a result skirmishes and feuds over land between rival tribes are common. The people are hardened to the changes in temperature and extremes, and so is the fauna. The only continent that remains constant is Asaheim, standing on top of the crest of the world. During the summer, it is covered in lava and magma flows, but is habitable during the winter.[Needs Citation]
It is located relatively close to the Eye of Terror. The central sea of Fenris is the Savage Sea or Worldsea, home to most of the planet's wildlife, most of which are vicious sea creatures. Nonetheless the sea provides most of the planet's inhabitants with their food.
- Asaheim — The only stable continent on Fenris, located on its northern pole. Here there are many unique creatures not seen elsewhere on the world such as bears, elks, mastodons, ice trolls, shape-shifting dopplegangrels, and ice wyrms. Asaheim is surrounded by cliffs thousands of feet high, separating it from the rest of the planet. The tribesmen of Fenris consider it the land of the Gods.
- The Seven Great Peaks of Asaheim:
- Worldsea or Savage Sea - Fenris' single enormous ocean, home to many sea monsters and other dreadful creators. It experiences constant and violent weather fluctuations such as ice storms and hurricanes.
- Island of the Iron Masters - Home to a tribe with a level of technology that includes iron weapons and steam engines. Fenrisians make difficult journeys to travel and trade with the Iron Masters, who maintain formidable forces to deter any pirates. The Iron Masters will sometimes train with Space Wolves Aspirants and Chapter Serfs.[13d]
- Kraken's Spur - A volcanic island that periodically rises and sinks. It is home to a Kraken graveyard, making it a site of potential plunder for Fenrisians while it is surfaced.
- Cavern Cities - These subterranean cities were built in Fenris' northern pole by the first Human colonizers. Built from the remains of their colonization vessels, they became a shelter during the Age of Strife but were ultimately abandoned for unknown reasons, though worship of Chaos, mutation, and the unleashing of ancient weaponry are all proposed. The remaining settlers inside eventually mutated into horrific monsters known as "nightgangers". Leman Russ later forbid any from entering the caverns. Deep within the caverns is an ancient temple of Tzeentch built by the Nightgangers.
- Fire Breather - Active and violent volcano.[2a]
- Thunder Mountain - Stable peak mounted with great rune stones. Home of the Thunderfist tribe.[2a]
- Syrtyr's Door — A volcanic cavern with mystical properties, considered by the people of Fenris to be the door to the Underverse.
- Valley of Burning Stones - An ominous valley with a dark reputation. Its Tribe, the Vulture Clan, would chain sacrificial offerings to the rocks above their settlement and set them alight. After Psykers in the Clan were discovered, they were mostly purged by the Space Wolves.
- Iron Isles - Range of volcanic mountains that serve as the forge for Space Wolves Rune Priests.
Flora and Fauna
Because of its harsh conditions, there is little native plant life on Fenris.[Needs Citation] Many studies have concluded that Fenrisian animals are the most dangerous on any planet, even more so than those on Catachan.[Needs Citation]
- Fangtree: A tree native to Fenris that is used by both the tribes and inhabitants of The Fang in craftsmanship.
- Bloodlice: Vermin that dwell in the carcasses of small animals.[13a]
- Cave Bear[5b]
- Drakes: Mighty, dragon-like creatures that circle above geothermal vents for warmth.[Needs Citation]
- Fathom Whales: Thousands of these creatures teem the polar shores to spawn.
- Fenrisian Elk: Mammals with razor-sharp antlers.[Needs Citation]
- Fenrisian Ice Fiend: Giant creatures twice the height of a Space Marine that bleed acidic blood.[Needs Citation]
- Fenrisian Mammoth: A single beast can crush a man in moments.[Needs Citation]
- Fenrisian Wolf: Among the most cunning and deadly predators in the galaxy, these wolves are capable of growing from the size of a small horse to that of an APC.
- Frost Mastodon[5b]
- Frost Wolf: Prefers to clamp its prey in massive jaws and shake its apart.
- Great White Bears: Massive creatures capable of destroying buildings.
- Hoggorm: Extremely venomous serpents.
- Ice Mammoth[7b]
- Kraken: Gigantic sea creatures that continue to grow until they are killed, possibly the remnants of a failed Tyranid invasion.
- Mountain Raptor: Fly above Fenris in flocks.
- Rime Spider: Lurks in ice caves to leap onto its prey. Clever and patient creatures.
- Ripperfish: Creatures capable of reducing a man to bone in seconds.
- Sea Dragon: Massive creatures that live in the Worldsea, their hides are used by nomads for ships and dwellings.[Needs Citation]
- Snow Hart: Mysterious beast hunted by Fenrisian tribes.
- Spore-Bear: Creatures that attack their prey using clubbing fists of bony spurs.
- Storm-Elk: Found in million head herds over the tundra of Fenris.
- Underfangs: Wolf-like beasts.
- Wendigore: Hunts on the glaciers of Fenris.
- Wrath-badgers: Famously ill-tempered beasts.
- Miscellaneous: Glacier Wurm, Ice Cobra, Peak Render, Razorhawk, Rot Spectre, Sabrewolf, Sea-Eagle, Snow-Blind Geist.
The population of Fenris is small, yet hardy and tough. Fenrisians are born warriors from cradle to grave, battling not only the planetary conditions but also each other. Land is the most precious commodity of the planet, and as a result tribes frequently clash with one another for its control. Tribal fighting escalates during the Time of Ice and Fire when new landmasses can rise from the ocean. But despite these hardships, the Fenrisians consider themselves blessed, for they have a chance to join the "Dwellers Above the Clouds", the Space Wolves. The Space Wolves carefully watch their tribal brethren, but never appear openly among them. To Fenrisians the Space Wolves are known as the Sky Warriors and have a mythical status. The Fenrisians take to the seas in simple wooden sail vessels known as Dragonships.[8a]
From a Fenrisian perspective, prospective candidates are mainly chosen from young warriors who fall in battle with grievous wounds, or perform prodigious feats of arms. These youths are taken from their tribes, and their wounds are treated if necessary, and taken to The Fang to train as Aspirants in camps scattered around Asaheim. Apart from the aspirants, the only normal permanent human inhabitants of Asaheim are the Kaerls, the Space Wolves' Chapter Serfs, who also serve as the planet's Planetary Defense Force.[Needs Citation]
- The Russ - Powerful tribe which Leman Russ himself eventually became king of.
- Iron Masters - The most technologically advanced tribe on Fenris with iron and steam technology. They live on the isolated Island of the Iron Masters, trading with those who may brave the journey.[13d]
- Vulture Clan - This tribe would chain sacrificial offerings to the rocks above their settlement and set them alight. After Psykers in the Clan were discovered, they were mostly purged by the Space Wolves.
- Hradcana - Major power in the west[8a].
Fenrisians have a tribal and highly superstitious religion. They worship the planet itself as Mother Fenris, routinely giving offerings to the soil and believing it can ward off evil spirits dubbed Maleficarum. They have shamans who take part in ritualistic acts and carve runes to harness the natural energy of Fenris.[8a]
The Fenrisians refer to their pantheon of deities and spirites as Aesir.[8a] Their supreme deity is the Allfather, or the Emperor of Mankind. Fenrisians also believe that those who die of old age are cowards and thus are condemned to the court of the Erlking.
- Valdrmani — The Wolf's Moon[5a]. Valdrmani is home to the Longhowl astropathic station. The domed city is the only habitable location on the radiation-soaked moon.[7a]
In Norse mythology, Fenrir is the son of Loki, who usually takes the form of a monstrous wolf.
- 1: White Dwarf 156 (UK), [Needs Citation]
- 2: Codex: Space Marines (5th Edition), pgs. 6–7
- 2a: pg.17
- 3: Codex: Space Marines (4th Edition), pg. 81
- 4: Logan Grimnar: Defender of Honour (Short Story) by Cavan Scott
- 5: War Zone Fenris: Curse of the Wulfen
- 6: Sanctus Reach: Blood on the Mountain (Novella) by Ben Counter, Chapter Four
- 7: War Zone Fenris: Wrath of Magnus
- 8: Prospero Burns (Novel), Chapter 4
- 8a: Chapter 1
- 9: The Emperor's Gift (Novel) by Aaron Dembski-Bowden, Part One, Chapter Two
- 10: Wolfsbane (Novel), Chapter 12-13
- 10a: Prologue
- 11: The Ashes of Prospero (Novel), Chapter 3
- 12: Codex: Space Wolves (8th Edition) — The Death World of Fenris
- 13: Lukas the Trickster (Novel)
- 14: White Dwarf 117 (UK) pg.13-14
- 15: Two Metaphysical Blades (Short Story)
- 16: Battle of the Fang (Novel) Chapter 6
- 17: Sanctus Reach: Blood on the Mountain (Novella)
- 18: Space Wolf (Novel) Chapter 15-16
- 18a: Chapter 2
- 19: Codex: Space Wolves (3rd Edition) pg.6
- 20: Champions of Fenris - A Codex: Space Wolves Supplement — Saga of the Great Wolf
- 21: Howl of the Hearthworld (Short Story)
- 22: Leman Russ: The Great Wolf (Novel) Chapter 1
- 23: Psychic Awakening: Saga of the Beast, pg. 4
- 24: Arjac Rockfist: Anvil of Fenris (Novella)
- White Dwarf 388 (UK). pg. 77