Here's the third of my conversions for the avatars of Elemental Evil - which I have turned into a servitor of Ymeri in the Golarion-verse. I've tried to make the Holocaust Disciple into something of a ranged combatant, in order to keep with its role in 3.5; still, there is the fact that a simple protection from elements spell will cripple this creature's offensive - which is why it is usually accompanied by tougher bruisers. Getting a holocaust disciple and a sufficiently aged red dragon with dispel magic to work together would probably make for a really dangerous encounter.

Again, enjoy and feel free to tell me where i can do better.

HOLOCAUST DISCIPLE

Image (c) Wizards of the Coast, from Monster Manual IV, author A. Stokes

Before you stands an imposing humanoid figure whose body seems to be made of pure fire. Its face is contorted in a wrathful grimace, and it wears a plain red robe that somehow is not consumed by the blaze.

HOLOCAUST DISCIPLE       CR 15

XP 51’200

NE Large Outsider (elemental, evil, extraplanar, fire)

Init +12; Senses darkvision 60 ft., Perception +24

Aura heat (15 ft., DC 26)

DEFENSE

AC 29, touch 18, flat-footed 20 (+8 Dex, +1 dodge, +11 natural, -1 size)

hp 216 (16d10+128); fast healing 5

Fort +18, Ref +18, Will +14;

Damage Reduction 15/good; Immune elemental traits

Weakness vulnerable to cold

OFFENSE

Speed 40 ft., flying 60 ft. (good)

Melee 2 slams +23 (2d10+6 plus 2d6 fire plus burn)

Ranged flame bolt +24 touch (8d6 fire / 19-20)

Special Attacks burn (2d10, DC 26), flame bolt, flame wave, heat aura

Spell-Like Abilities (CL 16th, concentration +23)

     At will – fireball (DC 20), fire shield (warm only, DC 21)

     3/day – wall of fire

     1/day – meteor swarm (DC 26)

STATISTICS

Str 23, Dex 27, Con 26, Int 15, Wis 22, Cha 24

Base Atk +16; CMB +23; CMD 41

Feats Combat Casting (B), Dodge, Improved Critical (flame bolt), Improved Initiative, Iron Will, Mobility, Point Blank Shot, Shot On The Run, Weapon Finesse, Wind Stance

Skills Acrobatics +21, Bluff +18, Fly +21, Intimidate +24, Knowledge (arcana) +18, Knowledge (planes) +21, Perception +24, Sense Motive +18, Spellcraft +21, Survival +22

Languages Common, Draconic, Ignan

ECOLOGY

Environment any (Elemental Plane of Fire)

Organization solitary (plus followers)

Treasure standard, no flammable items

SPECIAL ABILITIES

Flame Bolt (Ex): A holocaust disciple can shoot a bolt of flames at a single target as a ranged touch attack. This attack has a maximum range of 200 feet with no range increment.

Flame Wave (Su): A holocaust disciple can generate a wave of flames rollingout from its body. Any creature within 60 feet of the holocaust disciple takes 15d6 points of fire damage and must successfully resist a bull rush maneuver or be knocked prone. A successful Reflex save (DC 26) halves the damage and negates the bull rush maneuver. The save DC is Constitution-based.

Heat Aura (Su): At the end of each of their turns, all creatures within 15 feet of a holocaust disciple must make a Fortitude save (DC 26) or become fatigued from the intense heat that surrounds the disciple. A creature that is already fatigued becomes exhausted instead. A creature must attempt this saving throw each round it is within range, whether or not it has succeeded on an earlier save. The fatigued and exhausted conditions remain until the creature remains within the disciple’s heat aura, and for 1 minute after it has left the aura. A creature that has resistance or immunity to fire is immune to this effect. The save DC is Constitution-based. 

Unnatural beings of malevolent fire, holocaust disciples serve Ymeri the Queen of the Inferno, the ruler of evil fire elementals. They often accompany powerful priests of the Queen or covens of fire giants servitors, but their thirst for destruction causes them to chafe if they remain in stable locations for long. Holocaust disciples are the smartest of the elemental avatars, but they are constantly torn between their responsibilities and their innate destructive urges. Given free rein, a holocaust disciple would like nothing more than burn their mistress’ enemies and turn everything they cherish to ashes, but their position requires them to be patient, cunning and calculating, and to make sound decisions in order to further Ymeri’s will.

An holocaust disciple enjoys combat as a way to vent its perpetual rage. They are cunning combatants, but their impressive intellects are almost exclusively bent towards destruction. Usually, a holocaust disciple hangs back and flies above the battlefield, bathing its master’s enemies in withering flames while minimizing risks to itself. It prefers to work with creatures such as fire giants or red dragons, whose immunity to heat allows them to close in melee while shrugging off the disciple’s fiery bombardment. The very air around a holocaust disciple is overheated, cutting off its enemies’ breath and draining their strength.

In what spare time they have, many holocaust disciples enjoy collecting treasures that can withstand great heat, such as gems and magic items. They also love to collect coins to melt them down and reshape them into strange art objects. Collectors who specialize in alien, planar art forms would pay good prices for such finished works.