Bone Devil (Osyluth)
Large immortal humanoid (devil)
Level 17 Controller (Leader) XP 1600

Initiative +12        Senses Perception +15; Darkvision
Aura of Fear (Fear) aura 5; enemies in the aura take a -2 penalty to attack rolls
Aura of Obedience (Charm, Healing) aura 5; bone devils are immune; any bloodied devil in the aura at the start of its turn takes 10 damage but gains a +4 bonus to attack rolls and deals an extra 5 damage on melee attacks until the start of its next turn. If a devil is slain by this aura, the bone devil regains 10 hit
HP 165; Bloodied 82
AC 31; Fortitude 29, Reflex 26, Will 27
Resist 20 fire
Speed 8, teleport 8

Claw (standard, at-will)

Reach 2; +22 vs AC; 1d6+7 damage.

Poison Sting (standard, at-will) Poison

Reach 2; +20 vs Fortitude; 1d6+7 damage, and the target takes ongoing 10 poison damage and takes a -4 penalty to its Will defense (save ends both).

Double Attack (standard, at-will)

The bone devil makes two claw attacks. If both claw attacks hit the same target, the bone devil can make a secondary attack using poison sting against the target

Fiendish Focus (minor, at-will)

Range 5; +18 vs Will; the target takes a -5 penalty to all defenses until the end of the bone devil’s next turn.

Alignment Evil        Languages Supernal
Skills Insight +15, Intimidate +18
Str 25 (+15)      Dex 18 (+12)      Wis 15 (+10)
Con 21 (+13)      Int 11 (+8)      Cha 20 (+13)

Description: Bone devils are ruthless taskmasters, vigilantly watching over lesser creatures to ensure their obedience. In the Nine Hells, they fill a mid-ranking class of overseers and monitors who report on lesser devils, but they can sometimes be found in the service of powerful mortal tyrants, watching the ranks for the smallest signs of disloyalty or incompetence.

Published in Monster Manual, page(s) 62.