CHICHIMEC

Medium-Size Outsider (Air, Evil, Extraplanar)
Hit Dice: 27d8+189 (425 hp)
Initiative: +7
Speed: 5 ft., fly 200 ft. (perfect)
AC: 39 (+7 Dex, +22 natural)
Base Attack /Grapple: +27/+39
Attack:  Primary wing buffet +39 (2d6+12) melee
Full Attack:  2 primary wing buffets +39 (2d6+12) melee, 6 secondary wing buffets +37 (1d6+6) melee, tail slam +37 (1d6+6 plus Cha drain) melee
Space/Reach:  5 ft./5 ft.
Special Attacks:  Spell-like abilities, summon air elemental, Charisma drain
Special Qualities:  Abomination traits, fast healing 10, SR 33, DR 10/ good and epic, electricity immunity
Saves:  Fort +22, Ref +22, Will +17
Abilities:  Str 34, Dex 25, Con 24, Int 12, Wis 14, Cha 30
Skills:  Diplomacy +14, Hide +37, Intimidate +40, Jump -3, Knowledge (religion) +31, Knowledge (the planes) +31, Listen +34, Move Silently +37, Search +31, Sense Motive +32, Spot +34
Feats:  Alertness, Dodge, Flyby Attack, Improved Bull Rush, Mobility, Multiattack, Power Attack
Epic Feats:  Blinding Speed (x 2), Epic Toughness
Climate/Terrain:  Any
Organization:  Solitary, pair, or flock (6-9)
Challenge Rating:  21
Treasure:  None
Alignment:  Always neutral evil
Advancement:  28-38 HD (Medium-size); 39-50 HD (Large)
An chichimec's natural weapons are treated as epic and evil-aligned for the purpose of overcoming damage reduction.

Combat

Spell-Like Abilities: At will-darkness, telekinesis; 3/day-improved invisibility, control weather, call lightning, lightning bolt, chain lightning, wail of the banshee. Caster level 20th; save DC 20 + spell level. The DC is Charisma-based.
Summon Air Elemental (Sp): Three times per day a chichimec can summon an elder air elemental.
Charisma Drain (Su): This effect permanently reduces a living opponent's Charisma score by 2 points when the chichimec hits with a tail slam, or 4 points on a critical hit. The chichimec heals 10 points of damage, or 20 on a critical hit, whenever it drains Charisma, gaining any excess as temporary hit points. These temporary hit points last a maximum of 1 hour. The attack allows a Fortitude save (DC 33)-on a successful save, only 1 point of Charisma is drained and the chichimec heals 5 points of damage. The DC is Charisma-based.
Abomination Traits: Immune to polymorphing, petrification, and other form-altering attacks; not subject to energy drain, ability drain, ability damage, or death from massive damage; immune to mind-affecting effects; fire resistance 20; cold resistance 20; nondetection; true seeing at will; blindsight 500 ft.; telepathy out to 1,000 ft.