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Osyluth (Bone Devil)

Perhaps more than any other devil, osyluths—also known as bone devils— embrace the torture and sadism for which Hell is so well known. They are exemplary inquisitors with an unwavering devotion to Hell’s laws and hierarchy, and they seek out heresies among mortals and devilkind with equal vigor. These devils arise from the Styx-fed swamps of Stygia, Hell’s fifth layer, from the stagnant energy of long-dead heresies. Left to their own devices, osyluths build massive, calcified hives in Stygia’s remote corners and hunt the infernal swampland for lesser devils and petitioners.

Recall Knowledge - Fiend (Religion): DC 26

OsyluthCreature 9

Source Pathfinder #147: Tomorrow Must Burn pg. 78
Perception +17; greater darkvision
Languages Celestial, Draconic, Infernal; telepathy 100 feet
Skills Arcana +18, Deception +19, Intimidation +21, Religion +15, Stealth +20
Str +5, Dex +5, Con +4, Int +3, Wis +2, Cha +4
AC 28, Fort +21, Ref +18, Will +15; +1 status to all saves vs. magic
HP 146; Immunities fire; Resistances physical 10 (except silver), poison 10; Weaknesses good 10
Speed 35 feet, fly 30 feet
Melee Single ActionSingle Action jaws +20, Damage 2d10+11 piercingMelee Single ActionSingle Action claw +20 (agile, reach 10 feet), Damage 2d6+11 slashingMelee Single ActionSingle Action stinger +21 (reach 15 feet), Damage 1d10+11 piercing plus bone devil venomRanged Single ActionSingle Action bone shard +20 (range increment 30 feet), Damage 2d6+8 piercingDivine Innate Spells DC 25; 5th dimension door, phantom pain; 4th dimension door (at will), dimensional anchor (x2), discern lies; 2nd invisibility (at will; self only)
Divine Rituals DC 25; 1st infernal pact
Bone Devil Venom (poison) Saving Throw DC 25 Fortitude; Maximum Duration 6 rounds; Stage 1 2d6 poison damage, enfeebled 1 (1 round); Stage 2 3d6 poison damage and enfeebled 1 (1 round); Stage 3 3d6 poison damage, enfeebled 2, and the creature takes a –4 status penalty to Will saves against attempts to Coerce it (1 hour)Quick Invisibility The bone devil can cast invisibility on itself using only 1 action.Sadistic Strike A bone devil deals an extra 2d6 damage whenever it hits an creature that has the enfeebled, frightened, or prone condition with any of its Strikes.Tail Sweep Single ActionSingle Action The bone devil sweeps its tail in a 15-foot cone. Each creature in the cone must succeed at a DC 26 Reflex save or be knocked prone.

Sidebar - Additional Lore Artists of Agony

An osyluth practices the craft of torture with the passion of an artist. Their skill draws forth all manner of truths and secrets from their victims, which an osyluth can recall with immaculate precision even centuries later. Over time, osyluths amass sizable collections of information, making them particularly valuable resources to diabolists and other evil spellcasters who crave infernal knowledge. Of course, such conjurers also often employ osyluths for the devils’ cruel talents of interrogation, perpetuating the cycle of spilled blood and stolen secrets.

All Monsters in "Devil"

Barbazu (Bearded Devil)5
Cornugon (Horned Devil)16
Erinys (Fury Devil)8
Gelugon (Ice Devil)13
Osyluth (Bone Devil)9
Phistophilus (Contract Devil)10
Pit Fiend (Tyrant Devil)20


Source Bestiary pg. 86
Masters of corruption and architects of conquest, devils seek both to tempt mortal life to join in their pursuit of all things profane and to spread tyranny throughout all worlds. The temptations they offer mortals range from great powers granted by the signing of an infernal contract to twisted favors following a whispered pledge to a diabolic patron, or any number of even subtler exchanges. Those who succumb to these temptations find themselves consigned to an afterlife of endless torment in the pits of Hell, wherein the only hope of escape lies in the chance of being promoted to become a devil in the infernal ranks. Every devil has a specific role to play in the upkeep of the remorseless bureaucratic machine that is Hell, from soldiers and scholars to inquisitors, lawyers, judges, and executioners. Lowly lemures and imps perform subservient labor to more powerful and specialized devils, such as contract devils and erinyes, while the greatest pit fiends command entire infernal armies.

Sidebar - Additional Lore Archdevils

At any one time, eight archdevils rule the eight upper layers of Hell, while the deepest layer is ruled by Asmodeus. Each archdevil is a unique demigod with a dedicated role in guiding the infernal machine forward. Barbatos is the doorwarden of Hellʼs uppermost layer, while Dispater rules Hellʼs largest city. Mammon guards Hellʼs treasuries, and Belial designs new weapons for Hellʼs legions. Geryon is the oldest archdevil and keeper of many secrets, while Moloch leads Hellʼs armies. Baalzebul is a brooding archdevil who has fallen from Asmodeusʼs favor, while mighty Mephistopheles was formed from the plane of Hell itself.

Sidebar - Additional Lore Diabolic Divinities

Many unique and powerful devils hold positions of power in Hell. The most numerous of these are the infernal dukes, many of whom were promoted to this position from already impressive statures as pit fiends. The supreme ruler of Hell itself is Asmodeus, the Prince of Darkness. Between these two tiers rule the eight archdevils—see the sidebar on the facing page.

Sidebar - Locations Diabolic Locations

The nine layers of Hell are the planar home of all devils, and they much prefer its tyrannically ordered environs to anywhere else in the multiverse. Yet devils can be encountered anywhere mortals can be tempted by infernal bargains or seek diabolic aid. On Golarion, the nation of Cheliax is particularly aligned with Hell. Its government is based upon Hellʼs organization, and the state church is that of Asmodeus.

Sidebar - Additional Lore Fiendish Relations

Devils view daemonsʼ constant hunt for souls as a short-sighted waste of potential, and demonsʼ chaotic destruction of society and flesh as uncivilized and obnoxious, but they do not loathe their fiendish counterparts. Indeed, most devils are more than willing to take advantage of daemons and demons as they can to further their own machinations.

Sidebar - Related Creatures Other Devils

The devils presented on these pages are a small sampling of the torments Hell has to offer. Other devils, like the inquisition-focused bone devils, the cherub-faced and fly-bodied accuser devils, and the aquatic drowning devil are a few examples of these widespread immortal creatures.