Fenrir (Fenris Wolf) — The Bound Devourer
Child of Loki and Angrboða, breaker of every ordinary fetter, prisoner of Gleipnir, and the wolf fated to meet Odin at Ragnarök.
Fenrir is a unique, intelligent mythic wolf of the Asgardian mythic tradition, feared by the gods, bound by them, and woven into the prophecy of Ragnarök. In the SpiralWorlds campaign present of 1454 CE, Fenrir remains imprisoned by Gleipnir.
Fenrir in Norse Myth
Fenrir is the monstrous wolf born to Loki and the giantess Angrboða, brother to Jörmungandr and Hel. Unlike an ordinary beast, Fenrir possesses understanding, speech and judgement. His danger lies not merely in his size and strength: he recognises deception, remembers those who wrong him, and understands the fear his growth creates among the gods.
The Æsir brought the young wolf among them, but Fenrir grew with terrifying speed. Of the gods, Týr was the one willing to approach and feed him. As the wolf became larger and stronger, the gods sought a means to restrain him.
Fenrir belongs among the giants, monsters and other non-Æsir powers associated with the Asgardian pantheon. He is not one of the Æsir and is not assigned divine rank here.
The Binding of Fenrir
The gods first challenged Fenrir to test his strength against mighty fetters. He broke the chain Lædingr. A second and stronger restraint, Drómi, also failed. The contests demonstrated that merely forging a heavier chain would never be enough.
A different answer was required. Dwarven smiths fashioned Gleipnir, a binding that looked less formidable than the chains Fenrir had already destroyed. It was light, supple and deceptively delicate, yet its making depended upon impossible substances and supernatural craft rather than the brute strength of iron.
- The sound of a cat’s footfall
- The beard of a woman
- The roots of a mountain
- The sinews of a bear
- The breath of a fish
- The spittle of a bird
The gods brought Fenrir to Lyngvi, an island in the lake Ámsvartnir, and challenged him to break the new restraint. Fenrir immediately distrusted the soft-looking binding. He agreed to the test only if one of the gods placed a hand in his mouth as a pledge that no deception was intended.
Týr’s Sacrifice
Týr accepted the price. He placed his hand between Fenrir’s jaws while the wolf was bound. Fenrir strained against Gleipnir and discovered that, unlike every chain before it, the slender fetter tightened rather than broke.
When Fenrir understood that the gods did not intend to release him, he bit away Týr’s hand. The loss became inseparable from both figures: Fenrir as the deceived and bound wolf, and Týr as the god willing to sacrifice his own hand to secure him.
Fenrir’s imprisonment was then made fast. A sword was set between his jaws, and from the wolf’s mouth flowed the river Ván. The victory of the gods was therefore not Fenrir’s death or final defeat: it was a containment that prophecy says will one day end.
Gleipnir
Gleipnir appears as a narrow, supple cord rather than a massive chain. Its strength is supernatural and specific: it succeeds where ordinary materials, great strength and conventional magic fail.
Gleipnir is not simply another item with unusually high hardness or hit points. It is the mythic restraint created to hold Fenrir. Abilities that normally allow Fenrir to ignore, escape, burst or magically bypass restraints do not function against Gleipnir.
| Ruleset | Effect of Gleipnir |
|---|---|
| D&D 5.5e / 2024 | While bound by Gleipnir, Fenrir has the Restrained condition, his Speed is 0, and Unfetterable does not function. Gleipnir cannot be escaped or broken by ordinary attacks, spells or ability checks. |
| Pathfinder 1e | Gleipnir suppresses Fenrir’s Unfetterable ability. Combat maneuver checks, Escape Artist checks, Strength checks, sunder attempts and non-artifact magic cannot free him from it. |
| D&D 3.5e | Gleipnir specifically overrides Fenrir’s Unfetterable special quality and continuous freedom of movement. Ordinary weapons, Strength checks and dispelling cannot break it. |
Fenrir and Ragnarök
Fenrir’s release belongs to Ragnarök. When the world’s bonds and fetters break, the wolf is freed and joins the final conflict. His passage accompanies the collapse of the established cosmic order, and his prophesied opponent is Odin.
Odin fights Fenrir and is ultimately swallowed by him. Víðarr then avenges his father, overcoming the wolf and killing him. Fenrir does not replace Sköll or Hati as the wolves associated with the destruction of the Sun and Moon; his defining role in Ragnarök is the death of Odin and his own death at Víðarr’s hands.
Ragnarök is prophecy, not the 1454 campaign calendar. Its existence does not require the SpiralWorlds present to be immediately approaching the end of the world.
Historical & Mythological Context
Fenrir survives in the medieval Icelandic literature that preserves much of the surviving Norse mythic tradition. The surviving sources do not present a single continuous biography written at one moment. Instead, references to the wolf occur across poems and prose accounts, with the fullest narrative of his binding preserved in the Prose Edda.
The Poetic Edda
The poems traditionally collected as the Poetic Edda preserve several of the oldest surviving literary references to Fenrir. Lokasenna alludes to Týr losing his hand when the wolf was bound, while Völuspá places Fenrir within the events of Ragnarök and the death of Odin.
These poems are particularly important because they show that the binding, Týr’s mutilation and Fenrir’s role in the final battle were not inventions of a single later prose retelling.
The Prose Edda
The fuller binding story appears in Snorri Sturluson’s Prose Edda, composed in medieval Iceland during the early thirteenth century. Its account describes Fenrir’s growth, the failed fetters, the creation of Gleipnir, the test on Lyngvi, Týr’s pledge and the wolf’s final restraint.
Details such as the six impossible ingredients of Gleipnir, the sword placed in Fenrir’s mouth and the river Ván belong to this fuller prose tradition.
Fenrir, Fenris and the Later Image of the Wolf
Modern English-language retellings frequently call the creature the Fenris Wolf or simply Fenris, while Fenrir is the primary name used here. Nineteenth- and early twentieth-century mythographers, illustrators and translators helped establish the familiar modern image of an enormous chained wolf confronting the gods.
The historical illustration used above belongs to that later reception rather than to the medieval manuscript tradition. It remains useful as part of Fenrir’s visual history, but the illustration should not be mistaken for evidence of how early Norse audiences themselves pictured the wolf.
Myth and SpiralWorlds
The mythological sequence remains the foundation of the SpiralWorlds version: Fenrir is born to Loki and Angrboða, raised among the gods, bound through the sacrifice of Týr’s hand, imprisoned by Gleipnir, and destined to kill Odin before being slain by Víðarr.
Material concerning the exact condition of Fenrir’s prison in 1454 CE, cults seeking his release, adventures involving Lyngvi, and game statistics belongs to the SpiralWorlds campaign setting rather than to the medieval source texts.
Fenrir in 1454 CE
In the campaign present, Fenrir remains bound. He does not periodically escape Gleipnir and roam Midgard. Stories claiming that he regularly slips his bonds may be false tales, confused prophecy, cultic claims or accounts of other monstrous wolves.
Fenrir can nevertheless influence mortal adventures without physically walking the Earth. Prophets dream of the strain upon Gleipnir. Wolf-cults seek lore concerning the binding. Smiths search for the impossible craft behind the cord. Enemies of the Æsir may attempt to locate Lyngvi, while servants of Asgard seek to keep such knowledge hidden.
Should Fenrir actually appear unbound, the event is extraordinary. It means Gleipnir has been overcome, a cosmic crisis has begun, or the campaign has entered the events of Ragnarök itself.
Game Statistics
The editions below describe the same unique Fenrir at different rules scales. The D&D 5.5e and Pathfinder treatments are modern conversions; the D&D 3.5e version preserves the epic legacy interpretation.
Armor Class 25 (natural armor)
Hit Points 676 (33d20 + 330)
Speed 80 ft.
Saving Throws Str +19, Dex +13, Con +19, Wis +15, Cha +16
Skills Athletics +19, Intimidation +16, Perception +15, Survival +15
Damage Resistances cold
Damage Immunities poison
Condition Immunities charmed, frightened, poisoned
Senses darkvision 120 ft., passive Perception 25
Languages Old Norse, Giant
Challenge 30 (155,000 XP; PB +9)
Traits
Keen Hearing and Smell. Fenrir has Advantage on Wisdom (Perception) checks that rely on hearing or smell.
Legendary Resistance (4/Day). If Fenrir fails a saving throw, he can choose to succeed instead.
Magic Resistance. Fenrir has Advantage on saving throws against spells and other magical effects.
Siege Monster. Fenrir deals double damage to objects and structures.
Unfetterable. Non-artifact magic can’t reduce Fenrir’s Speed. At the start of each of his turns, Fenrir can end the Grappled or Restrained condition on himself if that condition was not caused by an Artifact. This trait does not function against Gleipnir.
Actions
Multiattack. Fenrir makes three attacks: one Bite and two Claws.
Bite. Melee Attack Roll: +19, reach 20 ft. Hit: 49 (6d12 + 10) Piercing damage. If the target is a Huge or smaller creature, it is Grappled (escape DC 27). Until this grapple ends, the creature is Restrained. Fenrir can have one creature grappled in his jaws at a time.
Claw. Melee Attack Roll: +19, reach 15 ft. Hit: 36 (4d12 + 10) Slashing damage. If the target is Huge or smaller, it must succeed on a DC 27 Strength saving throw or have the Prone condition.
Swallow. Fenrir makes a Bite attack against a Huge or smaller creature he is grappling in his jaws. On a hit, the target takes the Bite’s damage, is swallowed, and the grapple ends.
While swallowed, a creature has the Blinded and Restrained conditions, has Total Cover against effects originating outside Fenrir, and takes 55 (10d10) Acid damage at the start of each of Fenrir’s turns.
If Fenrir takes 80 or more damage during a single turn from creatures inside him, he regurgitates all swallowed creatures at the end of that turn. They appear Prone in unoccupied spaces within 20 feet of him.
Dread Howl (Recharge 5–6). Each enemy of Fenrir’s choice within 300 feet that can hear him must make a DC 24 Wisdom saving throw. On a failure, the creature takes 45 (10d8) Psychic damage and has the Frightened condition for 1 minute. On a success, it takes half as much damage and isn’t Frightened. A frightened creature repeats the saving throw at the end of each of its turns.
World-Shaking Pounce (Recharge 6). Fenrir moves up to his Speed without provoking Opportunity Attacks. At the end of this movement, each creature on the ground within 30 feet must make a DC 27 Dexterity saving throw, taking 45 (10d8) Bludgeoning damage and falling Prone on a failed save, or taking half as much damage without falling Prone on a successful save.
Bonus Actions
Ravenous Advance. Fenrir moves up to half his Speed toward a creature he can see that is Frightened, Grappled by him, or below half its Hit Point maximum. This movement doesn’t provoke Opportunity Attacks from that creature.
Reactions
Snap at the Bold. When a creature Fenrir can see enters his Bite’s reach, Fenrir makes one Bite attack against it.
Legendary Actions
Fenrir can take 3 Legendary Actions, choosing from the options below. Only one option can be used at a time and only at the end of another creature’s turn. Fenrir regains all spent Legendary Actions at the start of his turn.
Hunt. Fenrir moves up to half his Speed without provoking Opportunity Attacks.
Claw. Fenrir makes one Claw attack.
Chomp (Costs 2 Actions). Fenrir makes one Bite attack or uses Swallow against a creature already grappled in his jaws.
Break the Ground (Costs 2 Actions). Each creature on the ground within 30 feet must succeed on a DC 27 Dexterity saving throw or take 28 (8d6) Bludgeoning damage and fall Prone. A successful save halves the damage and prevents the creature from falling Prone.
Optional Ragnarök Phase
Ragnarök Unbound. When Fenrir is used as one of the principal creatures in Ragnarök, the first time he is reduced to 0 Hit Points he can instead regain 338 Hit Points, immediately recharge Dread Howl and World-Shaking Pounce, and move up to his Speed.
Ragnarök Unbound is an encounter-phase upgrade and is not included in the base CR 30 rating.
CE Colossal magical beast (extraplanar, mythic, unique)
Init +13/-7; Senses darkvision 120 ft., low-light vision, scent; Perception +59
Aura frightful presence (300 ft., DC 35)
Defense
AC 48, touch 11, flat-footed 39 (+9 Dex, +37 natural, -8 size)
hp 766 (36d10+468 plus 100 mythic)
Fort +34, Ref +31, Will +26; second save
Defensive Abilities block attacks, mythic resilience; DR 10/epic; Immune fear, poison; SR 41
Offense
Speed 100 ft.
Melee bite +42 (8d10+19/17–20/×4 plus grab), 2 claws +41 (6d10+19)
Space 30 ft.; Reach 30 ft. (40 ft. with bite)
Special Attacks augmented critical, feral savagery, frightful presence, grab, mythic power (10/day, surge +1d12), pounce, savage, shockwave, swallow whole, trip
Statistics
Str 36, Dex 28, Con 34, Int 18, Wis 34, Cha 24
Base Atk +36; CMB +57; CMD 76 (80 vs. trip)
Feats Alertness, Awesome Blow, Cleave, Combat Expertise, Critical Focus, Great Cleave, Great Fortitude, Improved Bull Rush, Improved Critical (bite), Improved Initiative, Improved Trip, Iron Will, Lightning Reflexes, Multiattack, Power Attack, Skill Focus (Perception), Toughness, Weapon Focus (bite)
Mythic Feats Great Fortitude (mythic), Improved Critical (bite) (mythic), Iron Will (mythic), Lightning Reflexes (mythic), Power Attack (mythic)
Skills Acrobatics +48 (+76 when jumping), Intimidate +43, Perception +59, Sense Motive +50, Stealth +32, Survival +48
Languages Old Norse, Giant; can communicate with wolves
SQ keen senses, siege monster, unfetterable
Mythic Abilities block attacks, dual initiative, feral savagery, mythic grab, pounce, powerful blows, second save, savage, shockwave, unfetterable, unstoppable
Ecology
Environment Asgardian mythic realms
Organization solitary
Treasure none
Special Abilities
Augmented Critical (Ex). Fenrir’s bite has a base threat range of 19–20 and a ×3 critical multiplier. Improved Critical expands the threat range to 17–20, while Improved Critical (mythic) increases the multiplier to ×4.
Block Attacks (Ex). Once per round when Fenrir is hit by a melee or ranged attack, he can attempt a melee attack roll using his bite attack bonus. If his result exceeds the attack roll that struck him, that attack misses instead.
Dual Initiative (Ex). Fenrir acts twice each round, once at initiative +13 and again at initiative -7. Effects whose duration is measured in rounds advance only on Fenrir’s first turn each round.
Feral Savagery (Su). Whenever Fenrir makes a full attack, he can immediately make one additional bite attack at his full attack bonus.
Frightful Presence (Su). Creatures within 300 feet that are aware of Fenrir must succeed on a DC 35 Will save or become frightened for 5d6 rounds. A creature that succeeds is immune to Fenrir’s frightful presence for 24 hours. The save DC is Charisma-based.
Grab (Ex). If Fenrir hits a Gargantuan or smaller creature with his bite, he can attempt to start a grapple as a free action without provoking an attack of opportunity.
Mythic Grab (Ex). Fenrir takes no penalty for using grab while fighting creatures smaller than himself. By expending one use of mythic power, he can use grab against another Colossal creature for 1 round.
Mythic Power (Su). Fenrir can expend mythic power 10 times per day. He has a surge die of +1d12.
Mythic Resilience (Ex). When Fenrir succeeds at a saving throw against an effect that normally has a reduced effect on a successful save, he instead suffers no effect.
Pounce (Ex). When Fenrir charges, he can make a full attack at the end of the charge.
Powerful Blows (Ex). Fenrir applies 1-1/2 times his Strength modifier to damage with his claw attacks.
Savage (Ex). Once per round when Fenrir successfully trips or pins an opponent, he tears into the fallen creature for an additional 12d6+19 points of slashing and piercing damage.
Second Save (Ex). Whenever Fenrir fails a saving throw against an effect whose duration is longer than 1 round, he can attempt the saving throw again at the beginning of his next turn. A successful second save affects him as though he had succeeded on the original save.
Shockwave (Ex). As a standard action, Fenrir hurls his weight against the ground. Every other creature standing on the ground within 100 feet must succeed on a DC 35 Reflex save or take 20d6 points of bludgeoning damage and fall prone. A successful save halves the damage and prevents the creature from falling prone. Objects and structures take double damage. The effect resembles a localized earthquake but is not a spell.
Swallow Whole (Ex). Fenrir can swallow a grappled Gargantuan or smaller creature with a successful grapple check. A swallowed creature takes 12d6+19 points of bludgeoning damage plus 12d6 points of acid damage at the beginning of Fenrir’s turn. The interior has AC 34 and 80 hit points for the purpose of cutting an exit.
Trip (Ex). Whenever Fenrir hits an opponent with his bite, he can attempt a trip combat maneuver against that creature as a free action without provoking an attack of opportunity.
Unfetterable (Su). Fenrir is continuously protected as though by freedom of movement. As a swift action, he can expend one use of mythic power to end one non-artifact condition or restraint that impedes his movement. Neither benefit functions against Gleipnir.
Unstoppable (Ex). When Fenrir would become dazed, paralyzed, staggered or stunned, he can expend one use of mythic power as an immediate action to ignore the condition until the end of his next turn.
Siege Monster (Ex). Fenrir deals double damage to objects and structures.
| Hit Dice | 88d10+2,112 (2,596 hp) |
|---|---|
| Initiative | +21 |
| Speed | 100 ft. (20 squares) |
| Armor Class | 65 (-8 size, +13 Dex, +50 natural), touch 15, flat-footed 52 |
| Base Attack/Grapple | +88/+126 |
| Attack | Bite +103 melee (12d6+22/15–20/×3 plus 2d6 on a critical) |
| Full Attack | Bite +103 melee (12d6+22/15–20/×3 plus 2d6 on a critical) and 2 claws +101 melee (10d6+11/19–20) |
| Space/Reach | 50 ft./40 ft. |
| Special Attacks | Augmented critical, battle frenzy, frightful howl, improved grab, savage, shockwave, swallow whole, trip |
| Special Qualities | Blindsight 240 ft., damage reduction 20/epic, darkvision 240 ft., fast healing 20, low-light vision, resistance to acid 30, cold 30, electricity 30, fire 30 and sonic 30, scent, unfetterable |
| Saves | Fort +76, Ref +59, Will +46 |
| Abilities | Str 54, Dex 36, Con 59, Int 18, Wis 32, Cha 19 |
| Skills | Hide +98, Jump +141, Listen +114, Move Silently +114, Spot +114, Survival +102* |
| Feats | Alertness, Awesome Blow, Cleave, Combat Expertise, Combat Reflexes, Devastating Critical (bite, DC 76), Dire Charge, Dodge, Epic Fortitude, Epic Will, Great Cleave, Great Fortitude, Improved Bull Rush, Improved Critical (bite), Improved Critical (claw), Improved Initiative, Improved Overrun, Improved Sunder, Improved Trip, Iron Will, Legendary Leaper, Mobility, Multiattack, Overwhelming Critical (bite), Power Attack, Run, Spring Attack, Superior Initiative, Weapon Focus (bite), Weapon Focus (claw), Track (B) |
| Environment | Asgardian mythic realms |
| Organization | Solitary |
| Challenge Rating | 40 |
| Treasure | None |
| Alignment | Chaotic evil |
| Advancement | — |
| Level Adjustment | — |
| Languages | Old Norse, Giant; can communicate with wolves |
Combat
Fenrir relies on overwhelming movement, reach and physical force. He can bite, rake with both foreclaws, hurl opponents to the ground and swallow creatures smaller than himself. His full attack uses the bite and both claws.
Augmented Critical (Ex). Fenrir’s bite has a base threat range of 18–20 and deals ×3 damage on a critical hit. Improved Critical expands the displayed threat range to 15–20. His epic critical feats apply normally.
Battle Frenzy (Ex). When Fenrir is reduced to 25% or fewer of his maximum hit points, he gains a +4 inherent bonus to Strength and may make one additional bite attack each round at a -5 penalty. These benefits end if he is healed above that threshold.
Frightful Howl (Su). As a standard action Fenrir can unleash a howl in a 1-mile-radius spread. Opponents with fewer Hit Dice or levels than Fenrir must succeed on a DC 58 Will save or become shaken. A successful save grants immunity to Fenrir’s Frightful Howl for 24 hours. The save DC is Charisma-based.
Improved Grab (Ex). To use this ability, Fenrir must hit a Huge or smaller opponent with his bite. He can then attempt to start a grapple as a free action without provoking an attack of opportunity. If he establishes a hold, he can attempt to swallow the opponent on his next turn.
Savage (Ex). If Fenrir successfully trips an opponent, he can immediately savage the fallen creature, dealing an additional 60d6+110 points of damage. If a creature falls prone for another reason in an area Fenrir threatens, he may use Savage against it as his attack of opportunity for that round.
Shockwave (Ex). As a standard action Fenrir throws his immense body against the ground. All other creatures within 100 feet must succeed on a DC 76 Reflex save or fall prone. Structures in the area take 4d6 points of damage. The effect resembles a sharply localized earthquake, but is extraordinary rather than spellcasting. The save DC is Strength-based.
Swallow Whole (Ex). Fenrir can swallow a grappled Huge or smaller opponent by succeeding on a grapple check. A swallowed creature takes 24d6+22 points of crushing damage plus 12d6+26 points of acid damage each round. A creature can cut its way free by dealing 200 points of damage to the digestive tract (AC 35). Once an opening is used, muscular action closes it.
Fenrir’s gullet can contain two Huge, four Large, eight Medium, thirty-two Small, 128 Tiny, or 512 Diminutive or smaller creatures.
Trip (Ex). When Fenrir hits with his bite he may attempt to trip the target as a free action, using a +38 modifier on the opposed Strength check, without making a touch attack or provoking an attack of opportunity. If the attempt fails, the defender cannot attempt to trip Fenrir in return.
Unfetterable (Su). Fenrir is continuously protected as though by freedom of movement, and ordinary restraints cannot hold him. This ability cannot be dispelled or suppressed by conventional magic. Gleipnir specifically overrides this ability.
Skills. Fenrir has a +10 racial bonus on Hide, Listen, Move Silently and Spot checks. He has a +4 racial bonus on Survival checks made to track by scent.
Using Fenrir in a Campaign
Fenrir works best as a unique power whose imprisonment shapes events long before an actual confrontation becomes possible. His presence can enter play through the location of Lyngvi, dwarven lore concerning Gleipnir, prophecies of Ragnarök, cults seeking his release, fragments of false bindings, or attempts by hostile powers to discover what can restrain creatures of comparable strength.
An unbound Fenrir is a campaign-scale event. His statistics are intended for epic play, divine conflicts, planar catastrophes and Ragnarök itself rather than as a routine wandering encounter.
Selected Videos
Two concise modern retellings are retained here for readers who want an audiovisual introduction to Fenrir. They are supplementary retellings rather than primary mythological sources.
Related SpiralWorlds Entries
Fenrir is presented as a unique mythological monster associated with the Asgardian pantheon rather than an Æsir deity. In the SpiralWorlds campaign present of 1454 CE, Gleipnir remains intact. Fenrir’s release, Odin’s death and Fenrir’s death at Víðarr’s hands belong to Ragnarök.