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Bone devils, also called osyluths, are lesser devils found in the Nine Hells.

Description[]

Bone devils are somewhat humanoid in shape, with spiny protrusions on their large skeletal forms. They have long, scorpion-like tails that loom over them as they walk. Pulled taut over that frame is their ash-white skin.[5] They have insectoid wings jutting from their shoulderblades, and their hands have claws.[6] Their faces have bony chins; when they speak, their jaws seem to unhinge and grow longer, and their long tongues extend out and writhe from their lipless mouths.[7] Beneath their skin, their sinews and muscle are dark bluish-purple,[8] but their blood is a dark crimson.[9]

Abilities[]

The following is taken from the Monster Manual, 5th Edition, page 71, but some abilities have been demonstrated in-game:

  • Saving throw proficiencies: INT, WIS, CHA
  • Damage resistances: cold, bludgeoning/piercing/slashing from nonmagical weapons that aren't silvered
  • Damage immunities: fire, poison
  • Condition immunity: poisoned
  • Devil's Sight: Magical darkness doesn't impede the bone devil's darkvision.
  • Magic Resistance: The bone devil has advantage on saving throws against spells and other magical effects.
  • Actions
    • Claw: Reach 10 ft., deals slashing damage
    • Sting: Reach 10 ft., deals piercing and poison damage, and the target must succeed on a Constitution saving throw or be poisoned for up to 1 minute or until it succeeds on a saving throw at the end of its turns
    • Multiattack: Two claw attacks and one sting

History[]

In the Age of Arcanum, the Betrayer Gods each created a weapon incorporating the life force of a fiend. Tiamat, the Scaled Tyrant, forged a war pick called the Will of the Talon using the soul of a short-tempered bone devil named Ashtyrlon. The sentient weapon has higher mental ability stats than a typical bone devil, and it can understand and telepathically communicate in Draconic and Common in addition to the Infernal bone devils usually know.[10]

Campaign One: Vox Machina[]

Vox Machina saw bone devils traveling in small groups of two to four in the streets of the City of Brass in the Elemental Plane of Fire.[11]

When Vox Machina arrived in the City of Dis in the Nine Hells, one of the first things they saw in the streets was a group of lemures being whipped by a pair of bone devils.[12] They soon encountered another bone devil who had chained up three lemures on the outside of a building;[13] they noticed it talking to another bone devil not long afterward.[14]

When Ipkesh hired Vox Machina to assassinate Utugash, he noted that the pit fiend had a bone devil or two among his guards.[15] Indeed, when they attacked Utugash, a bone devil quickly entered the fray.[16] When Utugash and his minions were slain, Vox Machina and their new ally Tova allowed themselves to be arrested so that they could enter Mentiri, the prison beneath the City of Dis, and two of the creatures that took them into custody were bone devils wearing special sashes; Keyleth transformed herself into a bone devil for the occasion, but the arresting devils saw through her deception.[17]

Later, after the party had escaped their cell and were traversing the prison in the form of bats, they encountered another bone devil accompanied by three spined devils. The spined devils caught up with them, and when the bone devil entered the fight it nearly killed Keyleth, which would have pretty well ended their campaign, as she was the only member of the party who could cast Plane Shift to get them out.[18]

Explorer's Guide to Wildemount[]

Gorthux, the hobgoblin leader of the Lords of Strife, a cult dedicated to the Strife Emperor, has the ability to transform into a bone devil once per day.[19]

Trivia[]

  • Sam Riegel devised an ad read for D&D Beyond touting the ability to create your own monsters. One of his absurd twists on an existing creature was a "bone dirt devil".[20]

References[]

  1. See "Vox Machina Go to Hell" (1x91) at 1:17:31.
  2. See "Vox Machina Go to Hell" (1x91) at 1:17:31.
  3. See "Bats Out of Hell" (1x93) at 0:41:15.
  4. See D&D: Monster Manual (2014), 5th ed., p. 71.
  5. See "Vox Machina Go to Hell" (1x91) at 1:17:31.
  6. See "Bats Out of Hell" (1x93) at 0:41:15.
  7. See "Vox Machina Go to Hell" (1x91) at 2:10:08.  See also 2:01:48.
  8. See "Bats Out of Hell" (1x93) at 0:47:20.
  9. See "Bats Out of Hell" (1x93) at 1:39:01.
  10. See Explorer's Guide to Wildemount, p. 279. See also p. 31.
  11. See "Where the Cards Fall" (1x75) at 20:56.
  12. See "Vox Machina Go to Hell" (1x91) at 1:17:31.
  13. See "Vox Machina Go to Hell" (1x91) from 1:59:03 through 2:02:08.
  14. See "Vox Machina Go to Hell" (1x91) at 2:10:08.
  15. See "Deals in the Dark" (1x92) at 1:36:00.
  16. See "Bats Out of Hell" (1x93) at 0:41:15.
  17. See "Bats Out of Hell" (1x93) from 2:18:32 through 2:22:55.
  18. See "Bats Out of Hell" (1x93) from 3:16:53 through 3:49:36.
  19. See Explorer's Guide to Wildemount, p. 134.
  20. See "Lost Treasures" (2x22) at 4:12.

Art:

  1. Depiction of a bone devil, by Filip Burburan from D&D: Monster Manual, 5th Edition, p. 71. This page contains unofficial Fan Content permitted under the Wizards of the Coast Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC.