Unique Devil · Canian Power · Infernal Tempter
Belphegor — Lord of the Opening
Patron of the shortcut, corrupt invention, effortless wealth and the brilliant solution whose hidden cost is discovered only when it is too late.
Belphegor does not usually tempt mortals by asking them to abandon ambition. He offers something more dangerous: success without the labour that should have earned it.
The engineer receives the missing calculation. The alchemist discovers the process everyone else believed impossible. The ruler learns how to refill an empty treasury. The magician discovers a way to remove the most difficult stage from a ritual.
The invention works. The fortune appears. The obstacle disappears.
Somewhere inside the solution lies Belphegor’s price.
Game Statistics
Belphegor at the Table
Belphegor is a major infernal power of Cania, but he is not its sovereign. He operates beneath the recognised lordship of Mephistopheles and ultimately beneath Asmodeus.
His strengths are supernatural persuasion, infernal engineering, battlefield control and the ability to make dangerous choices appear irresistibly efficient.
The defining mechanic: Belphegor can offer a character a genuine advantage immediately after failure. The character chooses whether to accept. The shortcut works, but accepting it creates infernal leverage.
Accepting Belphegor’s help does not automatically surrender a soul. A genuine infernal claim requires an appropriate contract, allegiance, binding or other recognised supernatural basis.
Belphegor, Lord of the Opening
Large Fiend (Devil), Lawful Evil
Traits
Aura of Inertia. An enemy that starts its turn within 30 feet of Belphegor must make a DC 26 Wisdom saving throw. On a failed save, the creature’s Speed is reduced by 20 feet until the start of its next turn, it cannot take Reactions during that time, and it has Disadvantage on the first D20 Test it makes before the start of its next turn.
Legendary Resistance (4/Day; 5/Day in Lair). If Belphegor fails a saving throw, he can choose to succeed instead.
Magic Resistance. Belphegor has Advantage on saving throws against spells and other magical effects.
Regeneration. Belphegor regains 20 Hit Points at the start of his turn if he has at least 1 Hit Point.
Infernal Rejuvenation. If Belphegor is destroyed outside Hell, his infernal essence returns to the Black Workshop in Cania. Unless a specific supernatural effect prevents his return, he reforms there in 1d10 days.
Actions
Multiattack. Belphegor makes three attacks, using Infernal Talon or Black-Ice Lance in any combination.
Infernal Talon. Melee Attack Roll: +16 to hit, reach 10 ft., one target. Hit: 24 (3d10 + 8) Slashing damage plus 18 (4d8) Cold damage.
Black-Ice Lance. Ranged Spell Attack: +18 to hit, range 120 ft., one target. Hit: 27 (5d10) Cold damage plus 23 (5d8) Psychic damage.
Impossible Prototype (Recharge 5–6). Belphegor activates, unfolds or awakens an infernal device at a point he can see within 120 feet. Choose one configuration:
- Collapse Engine. Each creature in a 30-foot-radius Sphere centred on the point makes a DC 26 Dexterity saving throw. On a failed save, a creature takes 72 (16d8) Force damage. On a successful save, it takes half as much damage.
- Null Engine. Each creature in a 30-foot-radius Sphere centred on the point makes a DC 26 Constitution saving throw. On a failed save, a creature takes 45 (10d8) Cold damage, its Speed is halved, and it cannot take Reactions until the end of its next turn. On a successful save, it takes half as much damage only.
- Whisper Engine. Each enemy in a 30-foot-radius Sphere centred on the point that can hear Belphegor makes a DC 26 Wisdom saving throw. On a failed save, the creature takes 36 (8d8) Psychic damage and has the Charmed condition until the end of its next turn. On a successful save, it takes half as much damage and is not Charmed.
The Easy Way. Belphegor targets one creature he can see within 60 feet that can hear and understand him. The target makes a DC 26 Wisdom saving throw. On a failed save, the target takes 27 (6d8) Psychic damage and has the Charmed condition until the end of Belphegor’s next turn. While Charmed in this way, its Speed is 0 and it cannot take Reactions as its mind fills with visions of effortless victory. On a successful save, the target takes half as much damage and is not Charmed.
Bonus Actions
Black-Ice Step. Belphegor teleports up to 60 feet to an unoccupied space he can see. Perfect geometric lines briefly appear in frost at the space he leaves and the space into which he arrives.
Reaction
Accept the Shortcut. Trigger: A creature Belphegor can see within 60 feet that can hear him fails a D20 Test.
Belphegor offers supernatural assistance. The creature chooses whether to accept it.
If the creature refuses, nothing happens.
If it accepts, it rerolls the failed D20 Test with Advantage and must use the new roll. It then bears an Infernal Debt until the next dawn.
While that debt remains, Belphegor knows the creature’s approximate direction and distance while both are on the same plane, and the creature has Disadvantage on saving throws against Belphegor’s Charmed and Psychic effects.
Infernal Debt creates leverage. It is not automatically a contract for the creature’s soul.
Legendary Actions
Legendary Action Uses: 3 (4 in Lair). Immediately after another creature’s turn, Belphegor can expend one use to take one of the following actions. He regains all expended uses at the start of his turn.
Calculated Assault. Belphegor moves up to half his Speed without provoking Opportunity Attacks, then makes one Infernal Talon attack.
Whispered Formula. One creature Belphegor can see within 60 feet makes a DC 26 Wisdom saving throw. On a failed save, it takes 27 (6d8) Psychic damage and cannot take Reactions until the end of its next turn. On a successful save, it takes half as much damage.
Trigger Prototype. A mechanism, diagram or shard of engineered black ice within 60 feet erupts. Each creature other than Belphegor in a 15-foot-radius Sphere centred on that point makes a DC 26 Dexterity saving throw. On a failed save, a creature takes 36 (8d8) Force damage plus 18 (4d8) Cold damage. On a successful save, it takes half as much damage. Belphegor cannot use Trigger Prototype again until the start of his next turn.
The Black Workshop
When Belphegor is fought within his principal stronghold in Cania, his Legendary Resistance increases from four uses to five, and his Legendary Action Uses increase from three to four.
The workshop itself contains articulated tools, infernal engines, moving gantries, black-ice conduits and unfinished mechanisms. These features explain the environmental manifestations of Trigger Prototype without requiring a separate universal lair-action sequence.
Regional Effects
- Unfinished diagrams appear overnight on walls, frost, parchment and workshop benches. They describe ingenious devices but omit one crucial consequence.
- Unattended mechanisms occasionally repair or improve themselves, usually in ways that make them more efficient and less safe.
- Creatures spending several hours near the Black Workshop find unnecessary labour increasingly irritating. Shortcuts become emotionally attractive even when their risks are obvious.
- Black frost forms perfect geometric structures resembling gears, diagrams, astronomical instruments and architectural plans.
If Belphegor is permanently removed from the region, these effects fade during the following 1d10 days.
Belphegor
CR 26 · Unique LE Large Outsider (Devil, Evil, Extraplanar, Lawful)
Defense
Offense
Spell-Like Abilities
CL 26th; concentration +36
- Constant — tongues, true seeing
- At will — greater dispel magic, greater teleport, major image, suggestion, telekinesis
- 3/day each — chain lightning, dominate monster, finger of death, limited wish
- 1/day — trap the soul
Statistics
Special Abilities
Aura of Inertia (Su). A non-devil beginning its turn within 30 feet of Belphegor must succeed on a DC 39 Will save or become lethargic for 1 round. Its speed is halved, it cannot make attacks of opportunity, and it takes a -4 penalty on attack rolls, Reflex saves and Dexterity-based skill checks. A creature that succeeds is immune to Belphegor’s Aura of Inertia for 24 hours. The save DC is Charisma-based and includes Ability Focus.
Bargain of the Easy Way (Su). When a creature within 60 feet that can hear Belphegor fails an attack roll, saving throw, ability check or skill check, Belphegor can offer assistance as an immediate action. The creature may refuse.
If it accepts, it rerolls the failed roll with a +4 profane bonus and must accept the new result.
For the next 24 hours, Belphegor always knows the creature’s direction while both are on the same plane, and the creature takes a -4 penalty on saving throws against Belphegor’s mind-affecting abilities.
Accepting this ability does not by itself transfer ownership of the creature’s soul.
Impossible Prototype (Su). Three times per day as a standard action, Belphegor activates an infernal device at a point within 120 feet. He chooses one configuration:
- Collapse. Creatures in a 30-foot radius take 20d8 points of force damage, Reflex DC 37 half.
- Inertia. Creatures in a 30-foot radius must succeed on a DC 37 Will save or become staggered for 1 round and have their speed halved for 1d4 rounds.
- Whisper. Creatures in a 30-foot radius that can hear Belphegor must succeed on a DC 37 Will save or become fascinated for 1 round and then affected as suggestion for 1 hour.
The save DCs are Charisma-based.
Infernal Rejuvenation (Su). If destroyed outside Hell, Belphegor’s essence returns to Cania and reforms in 1d10 days unless a specific supernatural effect prevents his return.
Regeneration (Ex). Good-aligned weapons and spells or effects with the good descriptor deal normal damage to Belphegor.
Summon Devils (Sp). Once per day, Belphegor can summon either two ice devils or four bone devils .
Belphegor, Lord of the Opening
Large Outsider (Devil, Evil, Extraplanar, Lawful)
| Hit Dice | 38d8+380 (551 hp) |
|---|---|
| Initiative | +11 |
| Speed | 40 ft.; fly 60 ft. (good) |
| Armor Class | 47 (-1 size, +7 Dex, +31 natural), touch 16, flat-footed 40 |
| Base Attack/Grapple | +38/+52 |
| Attack | Claw +47 melee (4d8+10 plus 3d6 cold/19–20) |
| Full Attack | 2 claws +47 melee (4d8+10 plus 3d6 cold/19–20) and bite +45 melee (4d10+5 plus 3d6 cold) |
| Space/Reach | 10 ft./10 ft. |
| Special Attacks | aura of inertia, ingenious temptation, impossible prototype, spell-like abilities, summon devils |
| Special Qualities | DR 25/good and silver, immunity to cold, fire and poison, acid resistance 20, regeneration 20, infernal rejuvenation, see in darkness, SR 42, telepathy 300 ft. |
| Saves | Fort +33, Ref +30, Will +36 |
| Abilities | Str 30, Dex 24, Con 30, Int 32, Wis 28, Cha 34 |
| Skills | Bluff +55, Concentration +51, Craft (metalworking) +52, Diplomacy +59, Intimidate +55, Knowledge (arcana) +52, Knowledge (architecture and engineering) +52, Knowledge (nobility and royalty) +52, Knowledge (the planes) +52, Listen +50, Search +52, Sense Motive +50, Spellcraft +54, Spot +50, Use Magic Device +53 |
| Feats | Ability Focus (Aura of Inertia), Combat Reflexes , Great Fortitude , Improved Critical (claw), Improved Initiative , Iron Will , Lightning Reflexes , Multiattack, Persuasive, Power Attack , Quicken Spell-Like Ability (greater dispel magic) |
| Epic Feats | Epic Reputation, Epic Will |
| Environment | Cania |
| Organization | Solitary (unique) |
| Challenge Rating | 30 |
| Treasure | Triple standard plus unique infernal prototypes |
| Alignment | Lawful Evil |
| Advancement | — |
Aura of Inertia (Su)
A non-devil beginning its turn within 30 feet of Belphegor must succeed on a DC 43 Will save or become lethargic for 1 round.
The affected creature moves at half speed, cannot make attacks of opportunity, and takes a -4 penalty on attack rolls, Reflex saves and Dexterity-based skill checks.
A creature that succeeds on the save is immune to Belphegor’s Aura of Inertia for 24 hours. The save DC is Charisma-based and includes Ability Focus.
Ingenious Temptation (Su)
Whenever a creature within 60 feet that can hear Belphegor fails an attack roll, saving throw, ability check or skill check, Belphegor may offer a supernatural shortcut as an immediate action.
The creature may refuse.
If it accepts, it rerolls the failed roll with a +5 profane bonus and must accept the new result.
For the next 24 hours, Belphegor knows the creature’s direction while both remain on the same plane, and the creature takes a -4 penalty on saving throws against Belphegor’s enchantment and mind-affecting abilities.
This agreement creates infernal leverage but is not, by itself, a contract for the creature’s soul.
Impossible Prototype (Su)
Three times per day, Belphegor can activate a compact infernal engine as a standard action. The device affects a point within 120 feet and produces one of the following effects:
- Collapse: creatures in a 30-foot radius take 20d8 force damage, Reflex DC 41 half.
- Inertia: creatures in a 30-foot radius must make a DC 41 Will save or be slowed for 1d4+1 rounds.
- Whisper: creatures in a 30-foot radius that can hear Belphegor must make a DC 41 Will save or be affected as suggestion for 1 hour.
The save DCs are Charisma-based.
Spell-Like Abilities
Caster level 30th. Save DCs are Charisma-based.
- Always active — tongues , true seeing
- At will — greater dispel magic , greater teleport , major image , suggestion , telekinesis
- 3/day — chain lightning , dominate monster , finger of death , limited wish
- 1/day — trap the soul
Summon Devils (Sp)
Once per day, Belphegor can automatically summon either two ice devils or four bone devils .
Infernal Rejuvenation (Su)
If Belphegor is destroyed outside Hell, his essence returns to Cania and reforms within the Black Workshop in 1d10 days unless prevented by an appropriate supernatural effect.
Regeneration (Ex)
Belphegor takes normal damage from good-aligned silver weapons and from spells or effects with the good descriptor.
SpiralWorlds Canon
The Devil Who Makes Things Easy
Belphegor understands a weakness more subtle than simple laziness. Most ambitious people do not want to do nothing. They want the reward while avoiding the cost required to deserve it.
That distinction defines him.
A merchant need not abandon business; Belphegor teaches a scheme that creates enormous profit while discarding inconvenient restraints.
An artificer need not cease inventing; Belphegor supplies the missing design that eliminates years of experimentation.
A general need not become cowardly; Belphegor provides the weapon that promises victory without a costly campaign.
A scholar need not reject learning; Belphegor simply offers the answer before the scholar has developed the judgement needed to understand its consequences.
Mammon sells wealth. Mephistopheles seeks knowledge. Belphegor sells effortless success.
Sloth
Belphegor’s sloth is not merely sleep or physical idleness. It is the desire to escape necessary effort, difficult learning, uncomfortable responsibility and the discipline required to complete worthwhile work correctly.
Invention
His designs can be genuinely brilliant. That makes them more dangerous than obvious frauds. Infernal ingenuity removes immediate problems while introducing dependencies, hidden obligations and consequences the recipient has not yet imagined.
Wealth
Belphegor uses riches primarily as proof that his method works. A first bargain may leave its beneficiary wealthier, safer and more respected than before, making the second agreement considerably easier.
The Opening
Within SpiralWorlds, Lord of the Opening is Belphegor’s infernal epithet. An opening is the path nobody else noticed: the concealed entrance, the missing theorem, the weakness in a contract or the shortcut through a problem believed impossible.
Appearance
Belphegor normally manifests as a towering horned devil with the bearing of a ruler, scholar and master craftsman rather than a raging beast.
His dark armour is worked through with exposed mechanisms, engraved circles, mathematical patterns, moving gears and components whose purpose is not obvious even to accomplished artificers.
Tools can move around him without visible support. Metal components rotate slowly in the air. Geometric figures crystallise across nearby ice. Half-finished mechanisms dismantle and rebuild themselves while he watches.
Belphegor is capable of astonishing physical violence, but even violence is approached as an engineering problem: identify the obstruction, calculate the least expensive solution, and remove it.
Behaviour and Personality
Belphegor is patient, cultivated and often unnervingly reasonable.
He listens before speaking. He identifies which burden his target most resents, then offers to remove it.
He is particularly interested in talented people. A fool may waste a brilliant idea. A gifted engineer, alchemist, physician, magician, merchant or statesman can transform one whispered principle into something capable of changing a kingdom.
Belphegor therefore does not hate competence.
He corrupts it.
His greatest successes are people who eventually stop asking whether something should be done and begin asking only whether there is an easier way to do it.
How Belphegor Tempts Mortals
His influence usually develops slowly.
1. The Small Improvement
Belphegor supplies a harmless-looking insight: a stronger hinge, a faster calculation, a cheaper alloy, a better accounting method or a more efficient ritual procedure.
2. The Impossible Success
The next idea produces a result the recipient could never have achieved so quickly alone. Suspicion becomes gratitude.
3. Dependence
The beneficiary begins facing problems by wondering what Belphegor would suggest rather than developing the patience, knowledge or discipline needed to solve them independently.
4. The Price
Only after Belphegor has become useful does he request service, access, secrecy, political influence, a particular object, an infernal favour or a formal contract.
A bargain with Belphegor can eventually establish a recognised infernal claim, but temptation alone does not automatically deliver a soul to Hell.
Contracts, allegiance, binding and other supernatural circumstances determine whether infernal authority possesses an enforceable claim.
The Eighth Perdition
Belphegor in Cania
Belphegor resides in Cania , the glacial Eighth Perdition, beneath the territorial authority of Mephistopheles .
He is neither Lord of Cania nor an alternative sovereign. His importance comes from specialised knowledge, infernal inventions, political connections and possession of a fortress capable of producing devices valuable to the Court of the Eighth.
The Black Workshop
Belphegor’s principal stronghold rises from blackened ice and dark metal within the moving wastes of Cania.
From outside it resembles an immense fortified manufactory embedded inside a glacier. Towers lean at calculated angles. Great gears turn beneath transparent ice. Steam escapes through narrow vents. Mechanical bridges unfold only when required.
The interior contains experimental halls rather than one continuous factory.
- Prototype weapons wait inside sealed vaults.
- Half-finished constructs repeat the same incomplete action for centuries.
- Captured magical devices are dismantled and reconstructed according to infernal principles.
- Frozen laboratories preserve failed experiments considered too valuable to destroy.
- Blueprint archives contain solutions to problems that have not yet occurred.
- Some corridors move because the fortress continually redesigns itself.
- Great halls contain mechanisms so large that their function cannot be understood from any single vantage point.
Heat exists where engineering requires it, but the fortress remains unmistakably Canian. Fire is a controlled industrial resource inside an overwhelmingly glacial environment, not Belphegor’s defining supernatural element.
Belphegor and Mephistopheles
Belphegor’s abilities make him extremely useful to Mephistopheles and ensure that he is watched.
Mephistopheles values knowledge because knowledge can be converted into power. Belphegor specialises in shortening the distance between knowledge and practical result.
A theory becomes a machine. A captured magical principle becomes a weapon. A weakness discovered in another plane becomes an exploitable device.
Neither devil mistakes usefulness for friendship.
Belphegor knows that the Lord of the Eighth tolerates powerful subordinates while their usefulness exceeds their danger. Mephistopheles knows that any creature devoted to discovering shortcuts may eventually search for a shortcut to greater political power.
Servants of the Black Workshop
Belphegor relies mainly upon established devilkind rather than surrounding himself with an invented species of personal minions.
- Ice Devils — Gelugons guard important approaches and transport valuable material across the glaciers.
- Bone Devils — Osyluths supervise prisoners, secure laboratories and investigate sabotage.
- Pit Fiends may arrive as senior representatives, military authorities or agents of greater infernal powers rather than ordinary servants.
- Claimed souls and prisoners possessing engineering, magical, alchemical or scholarly expertise may be forced to assist particular projects.
For the Dungeon Master
Using Belphegor in a Campaign
Belphegor works best when the temptation is genuinely useful.
If every gift is obviously defective, no intelligent character has a reason to accept one, and the heart of the encounter disappears.
Allow the first solution to solve a real problem.
The Engineer’s Dream
A siege engineer receives plans for a weapon decades ahead of contemporary design. The machine works, but one essential component can only be produced through a process taught by Belphegor.
The Empty Treasury
A ruler facing bankruptcy receives a financial scheme capable of restoring the treasury within months. The scheme is efficient, legal under a narrow reading of existing law, and ruinous for people without political influence.
The Impossible Ritual
A magician discovers that one exhausting stage of an important ritual can be omitted entirely. Nobody can explain why the shortened version still works.
The Perfect Weapon
An infernal prototype falls into mortal hands. It appears capable of destroying an enemy no conventional weapon can defeat, but activating it will reveal its location to Belphegor.
The Rival Inventor
A respected craftsperson begins producing astonishing discoveries at impossible speed. Their rivals suspect plagiarism. The truth is considerably worse.
The Missing Blueprint
Agents of Mephistopheles and Belphegor are searching for the same stolen design. Neither side wants the mortals carrying it to discover what the device actually does.
Negotiating with Belphegor
Belphegor should sound reasonable.
He does not need to demand a soul during the first conversation.
He can ask for permission to inspect an artefact, access to a library, delivery of a sealed object, silence about a discovery, an introduction to an influential person or a favour whose importance is not immediately apparent.
The central question is not whether the characters know Belphegor is dangerous.
The question is whether what he offers solves a problem they cannot otherwise solve in time.
Historical & Mythological Context
Belphegor in Demonology and Literature
Baal-Peor and Belphegor
Later demonological tradition associated Belphegor with Baal-Peor, a cult title connected with Peor in ancient Moab.
The older description of Belphegor as straightforwardly Assyrian is therefore not used here.
SpiralWorlds retains Lord of the Opening as Belphegor’s established fantasy epithet without presenting it as a certain literal translation of an ancient name.
Discovery, Wealth and Invention
Later European occult and demonological traditions describe Belphegor as a spirit connected with discoveries, ingenious inventions and the granting of wealth.
Those traditions provide the historical foundation for the SpiralWorlds interpretation of Belphegor as the infernal master of the shortcut.
Sloth
Belphegor also became strongly associated with sloth in later demonological classifications.
SpiralWorlds expands that concept beyond physical laziness: Belphegor represents the temptation to escape necessary effort, discipline, responsibility and mastery.
Machiavelli’s Belfagor
The famous story in which Belfagor enters mortal society and investigates marriage belongs to later Renaissance literature, especially Niccolò Machiavelli’s Belfagor arcidiavolo.
The work belongs to the sixteenth century, after the default 1454 SpiralWorlds present. It is therefore treated as later literary reception rather than an event in Belphegor’s in-world biography.
Historical artwork: Louis Le Breton’s 1863 Belphegor . A public-domain English edition of Machiavelli’s tale is preserved by Internet Archive .
Further Viewing
Belphegor in Demonological Tradition
This external video examines Belphegor’s traditional association with sloth and later demonological lore. It is included as historical inspiration, not as a definition of SpiralWorlds planar canon.
