Siiuhalsashoesh the Warrior Philosopher

Yuan-Ti Abomination (All Snake)
Large Monstrous Humanoid
12th level Fighter

Hit Dice 9d8+12d10+84 (190 hit points)
Initiative: +7 (+3 Dex, +4 Improved initiative)
Speed 30 ft. climb 20 ft., swim 20 ft.
AC 22 (+3 Dex, -1 Size, +10 Natural)
Attacks: Bite +28/+23/+18/+13 melee
Damage: Bite 2d6+12 and poison
Face/Reach: 5 ft. by 5 ft. / 10 ft.
Special Attacks: Spell-Like Abilities, Psionics, Improved Grab, Constrict 1d6+10, Poison, Tremor Sense, Heat Sense
Special Qualities: SR 16
Saves: Fort +15, Ref +13, Will +14
Abilities: Str 26, Dex 17, Con 19, Int 18, Wis 20, Cha 14.
Skills: Climb +20, Knowledge (Philosophy) +21, Knowledge (Religion) +15, Hide +15*, Listen +15, Read Lips +20, Sense Motive +13, Spot +15
Feats: Alertness, Blind-fight, Dodge, Expertise, Improved initiative, Virulent Poison, Deadly Poison, Ability Focus (Poison), Power Attack, Improved Bull Rush, Cleave, Mobility, Spring Attack, Improved Trip, Whirlwind Attack

Climate/Terrain: Warm forest and underground
Challenge Rating: 19
Alignment: Chaotic Evil
Possessions: None

 Siiuhalsashoesh is a powerful Ma-Yin, a fully snake-like abomination.  He is copper colored with red banding.  He is extremely strong for a snake, and his poison is powerful.  He supports the religious temples of the nest, and works as a bodyguard for the Shan-Pachan, the human headed abominations.  He is patient with others, and tends to speak in a mystical manner.  He knows a lot about philosophy, and enjoys learning new ones.  He is deaf, but can "hear" through vibrations transmitted through solid material, although it is hard to hear spoken words this way (DC +10 on listen checks).

Spell-like Abilities: 2/day - Animal Trance, Cause Fear, Deeper Darkness, Entangle, Neutralize poison, Suggestion, Polymorph Other. (8th Level Sorcerer DC12+Spell Level)

Psionics (Sp): All Yuan-Ti can produce the following effects at will.
            Detect Poison: As the spell cast by a 6th-level sorcerer.
            Alternate Form: The yuan-ti can assume the form of a Tiny to Large viper. This ability is similar to a shapechange spell cast by a 19th-level sorcerer but allows only viper forms. A yuan-ti in alternate form uses its most powerful poison attack if it has two.
            Chameleon Power: Yuan-ti can change their coloration to match their surroundings.
            Produce Acid: The yuan-ti can exude acid from its body, dealing 1d6 points of damage to anything it touches. The acid becomes inert when it leaves the yuan-ti's body.
            Aversion: The yuan-ti creates a compulsion effect targeting one creature within 30 feet. The subject must succeed at a Will save (DC 16) or gain an aversion to snakes for 10 minutes. Affected subjects must stay at least 20 feet from any snake or yuan-ti, alive or dead; if already within 20 feet, they move away. A subject can overcome the compulsion by succeeding at another DC 16 Will save, but still suffers deep anxiety. This caused a -4 reduction to Dex until the effect wears off or the subject is no longer within 20 feet of a snake or yuan-ti. This ability is otherwise similar to antipathy as cast by a 16th-level sorcerer.

Poison (Ex): Bite, Fortitude save (DC 21); initial 1d6 temp Con and secondary damage 2d6 temp Con.

Skills: Yuan-ti using chameleon power receive a +8 circumstance bonus to Hide checks.

Improved Grab (Ex): To use this ability, a snake-headed abomination must hit with its bite attack. If it gets a hold, it can constrict.

Constrict (Ex): An abomination deals 1d6+12 points of damage with a successful grapple check (using the bite attack bonus if snake-headed) against Large or smaller creatures.

Heat Sense (Ex): He has heat sensitive pits in his faces, allowing him to see infrared heat as well as most species see visible light.  He can see heat up to 80 feet away.  It gives him a +8 to sense motive checks.