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Bone devil.JPG
Type Devil

An osyluth, or "bone devil," is a type of devil in the Dungeons & Dragons roleplaying game.

Publication history[edit]

The bone devil (lesser devil) first appeared under the "devil" heading in the original first edition Monster Manual (1977).[1]

The osyluth lesser baatezu appear in second edition in the Monstrous Compendium Volume Outer Planes Appendix (1991) under the "baatezu" heading,[2] and are also detailed under the "baatezu" heading in the first Planescape Monstrous Compendium Appendix (1994).[3]

The osyluth appears under the "devil" heading in the third edition Monster Manual (2000),[4] and as the bone devil (osyluth) in the revised 3.5 edition Monster Manual (2003).



Osyluths are native to the Nine Hells of Baator.

Typical physical characteristics[edit]

An osyluth looks like a tall, emaciated being with dried skin stretched so tight as to outline and emphasize every bone. It has a skull-like head and a bony tail like a scorpion's, and exude a stench of decay. An osyluth stands about 9 feet tall and weighs roughly 500 pounds.


Osyluths are Lawful Evil.


Osyluths often serve as the informers and police of the Nine Hells, monitoring and reporting on the activities of other devils.

Other publishers[edit]

The osyluth appeared under the "devil" heading in Paizo Publishing's book Pathfinder Roleplaying Game Bestiary (2009), on page 74.[5]


  1. ^ Gygax, Gary. Monster Manual (TSR, 1977)
  2. ^ LaFountain, J. Paul. Monstrous Compendium Volume Outer Planes Appendix. (TSR, 1991)
  3. ^ Varney, Allen, ed. Planescape Monstrous Compendium Appendix (TSR, 1994)
  4. ^ Cook, Monte, Jonathan Tweet, and Skip Williams. Monster Manual (Wizards of the Coast, 2000)
  5. ^ Bulmahn, Jason (lead designer). Pathfinder Roleplaying Game Bestiary (Paizo Publishing, 2009)

External links[edit]