This creature appears to be a human skull with pointed teeth engulfed in flames.
Hatethrall Demon CR 6
Speed fly 60 ft. (perfect)
Melee bite +9 (1d4-1)
Ranged ray of fire +15 touch (3d6 fire)
Space 2-1/2 ft.; Reach 0 ft.
Spell-like Abilities (CL 8th)
Str 9, Dex 21, Con 19, Int 11, Wis 16, Cha 18
Base Atk +8; CMB +11; CMD 20 (cannot be tripped)
Feats Hover, Improved Initiative, Skill Focus (Bluff), Vital Strike
Skills Bluff +18, Diplomacy +15, Knowledge (local) +11, Knowledge (planes) +11, Fly +33, Sense Motive +14; Racial Modifiers +5 Fly
Languages Abyssal, Celestial, Common, Draconic; telepathy 100 ft
The flames engulfing a hatethrall can be concentrated and shot as a ray at any creature within 100 ft. A hatethrall can do this as a standard action once every 2 rounds.
Environment any (Abyss)
Organization solitary, pair, or flight (5-10)
Whenever a creature makes a deal with a demon, the hatethrall acts as an advisor. It serves its new client whom the greater demons sees as a potential asset. The hatethrall seldom takes action itself. Instead, this demon prefers to whisper to its client, suggesting whom to kill or what territory to overtake. While the creature may see itself as the one in command, the hatethrall is actually the one with the power. Should the creature choose to ignore a hatethrall’s suggestion, the demon will charm the creature and order it to do its bidding.
Several warlords and would-be dictators in the River Nations have a hatethrall lurking in the shadows. A few are even aware that the previous warlord of the land they now rule was advised by the very same hatethrall. These warlords know that the same could happen to them on a whim of hatethrall and eagerly strive to keep it pleased. When a hatethrall is forced to fight, it prefers to use its ray of fire attack as its main weapon alternated with darkness and doom to keep other creatures at bay. If the fight looks bad, it will summon in another hatethrall or a shadow demons to aid it. When the hatethrall loses more than half its hit points it will use either teleport or planeshift to remove itself from the fight.
A hatethrall is about 1 ft. tall, weights about 10 pounds, and appears like a human skull engulfed in flames.