Outsider (Baatezu, Evil, Lawful) · SM +1 Bone Devil (Osyluth) [Monster Manual, page 52]
Attributes
ST17
DX13
IQ11
HT12
HP17
Will12
Per12
FP12
Basic Speed6.25
Basic Move7
Dodge10
DR3
Melee attacks
| Usage | Level | Damage | Reach |
|---|---|---|---|
| Sharp ClawsSharp Claws (16): thrust 1d+1 cutting (KYOS: 2d+1 cutting), Reach C-1. | 16 | thrust 1d+1 cutting (KYOS: 2d+1 cutting) | C-1 |
| Sharp TeethSharp Teeth (16): thrust 1d+1 cutting (KYOS: 2d+1 cutting), Reach C. | 16 | thrust 1d+1 cutting (KYOS: 2d+1 cutting) | C |
| StingerStinger (16): thrust 2d-1 impaling (KYOS: 3d impaling) + follow-up 1d-1 toxic (3 1-hour cycles; Resisted with HT-3; Symptoms – -3 to ST after losing 1/3 HP. -4 to ST after losing 2/3 HP), Reach C. Poison: Toxic Attack 1d-1 (Cyclic, 1 hour, 3 cycles, Resistible, +20%; Follow-Up, Stinger, +0%; Resistible, HT-3, -15%; Symptoms, 1/3 HP, -3 ST, +45%; Symptoms, 2/3 HP, -4 ST, +20%) Resolve as stated by the construction; the source gives no separate resolution text. | 16 | thrust 2d-1 impaling (KYOS: 3d impaling) + follow-up 1d-1 toxic (3 1-hour cycles; Resisted with HT-3; Symptoms – -3 to ST after losing 1/3 HP. -4 to ST after losing 2/3 HP) | C |
| Fear AuraThe osyluth can take a Ready maneuver to project an aura of fear. Everyone within 10 yards of the osyluth must roll an immediate Fright Check (p. B360). If a victim succeeds at his Fright Check, he will be unaffected by this osyluth’s Fear Aura for one hour. | — | — | — |
Traits (17)
- Appearance (Monstrous)
- Axiomatic Touch
- Combat Reflexes
- Dark Vision
- Doesn’t Eat or Drink
- Immunity to Noxious Fire Effects
- Immunity to Poison
- Magic Resistance 2 (Improved)
- Sadism (12)
- Skinny
- Social Stigma (Monster)
- Telesend (Magical; Universal)
- Temperature Tolerance 6
- Unaging
- Unholy Touch
- Vulnerability (Holy Weapons, x2)
- Vulnerability (Silver, x2)
Skills (4)
- 16Brawling
- 16Innate Attack (Gaze)
- 14Observation
- 14Thaumatology
Notes
- GCS ancestry draft: gcs/bone-devil-osyluth.gct
- Source template total: 459 points.
- Library-rebuilt template total: 459 points.
- CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
- Review attacks, special abilities, encounter frequency, treasure, grappling, and GCS modifiers before approval.
Encounter rating
CER47
Offense28
Protection19
Threat tierstandard
Appearing2
Wandering3
Tags
- srd-3-5
- outsider
- baatezu
- evil
- lawful
GCS v5 downloads
Where this one came from
- Source record
- Bone Devil (Osyluth) [Monster Manual, page 52]
- Source system
- gurps_4e_fan_conversion / author_permission
- Released under
- cc_by_4_0
- Conversion
- 0.2.0-reviewed
- Review status
- approved
- Credit
- Original GURPS conversion by Enraged Eggplant, from Monsters (May 11, 2024); adapted and republished with permission.
- GCS ancestry draft: gcs/bone-devil-osyluth.gct
- Source template total: 459 points.
- Library-rebuilt template total: 459 points.
- CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
- Issue #5: 2 special ability construction(s) restored (Fear Aura, Poison). 1 save-or-disable construction(s) are scored through the affliction term at the source's stated point cost, or at Binding ST where the source builds the ability as a Binding.
- CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 28, PR 19, CER 47, threat tier standard.
- Conversion baseline reported OR 21, PR 19, CER 40 (tier standard). The reviewed values come from the consumer CER implementation, which rounds damage once after the damage-type multiplier and credits ranged accuracy; the conversion baseline ceilinged the damage base first and ignored range.
- Encounter metadata derived (default): average number appearing 2, wandering weight 3. Encounter metadata derived for 0.2.0 from the reviewed threat tier and creature class (appearing: minor 4 / standard 2 / major 1 / severe 1, forced to 1 for solitary classes — including swarms, which are a single multi-body creature — and raised to 6 for gregarious minor creatures; wandering weight: minor 4 / standard 3 / major 2 / severe 1). The fan-conversion source states no appearing-in-numbers or wandering values, so these are derived, not source mechanics.
- Lair, treasure, and grappling remain unpopulated in 0.2.0 by package policy: the authorized fan-conversion source states no lair, treasure, or grappling values, and review declines to invent them. See review/policy/0.2.0-empty-field-policy.md.
- Review approved by automated-mechanical-review on 2026-07-26 (batch ee-2026-07-26-b4-special-mechanics); GCS fidelity check passed, DOA playability check passed.
- Special-mechanics record. Mechanics the CER path cannot price are named per record in review/reports/cer-audit.md rather than folded into the number, and encounter counts are capped where a save-or-disable attack is present.
Enraged Eggplant GURPS monster conversions; used, adapted, and republished with unrestricted permission from the author. Portrait and tokens are AI-generated original art. Sources and credits.