West Flame Guardian (Cinderspawn)

"The guardian awaits your summons!"

Type: Undead (List)

Race: Fire Elemental (List)

Sub-race: Cinderspawn (List)

Monster Manual classification: Missing from MM: Fire Elemental

Alignment: Chaotic Evil

Boss: Orange Named - Mini boss

CR:  ♦16Normal ♥18Hard ♠21Elite

Attack: Enervation, Punch (Bludgeoning + Cold), Frostfire Smash (AoE explosion centred on cinderspawn - cold damage and stun), Slow

Special Qualities: Permanent Fire Shield (cold) spell, Immunity to cold, Undead Traits

Habitats: 

• Inferno of the Damned — Western set of torches (Inferno side) after all 4 torches have been extinguished
• Inferno of the Damned (epic)

Description: "As the last blue flame flickers out, the husk of a burnt out elemental appears and attacks."
To summon the Flame Guardian's spirit, you need to blow out the torches around the summoning symbol in the Inferno after you have beaten that same guardian in Eberron. You can either use a cold spell (e.g. from an Ice Storm wand), or you can lure an Air Mephit Warrior to blow it out with his abrasive breath.
"The first of my captors is nothing but ash. Hasten to the remaining three."