Shassyndolossil

Female Four-Headed Yuan-Ti Abomination (Human Arms)
Large Monstrous Humanoid (7 ft., 8 in. tall)

Hit Dice 17d8+119 (195 hit points)
Initiative: +5 (+1 Dex, +4 Improved initiative)
Speed 30 ft.
AC 21 (+1 Dex, -1 Size, +11 Natural)
Attacks Masterwork Falchion (x2) +21/+16 melee or Bite (x2) +20 melee
Damage: Masterwork Falchion 2d4+4 or Bite 2d6+6 and poison
Special Attacks: Spell-Like Abilities, Psionics, Improved Grab, Constrict 1d6+6, Poison, Superior Two Weapon Fighting
Special Qualities: SR 16, Heat Sense, Darkvision 90 ft.
Saves: Fort +12, Ref +11, Will +14
Abilities: Str 19, Dex 13, Con 25, Int 18, Wis 18, Cha 16.
Skills: Concentration +14, Craft (Alchemy) +12, Craft (Pottery) +12, Hide +12*, Listen +25, Spot +25, Search +12
Feats: Alertness, Blind-fight, Combat Reflexes, Dodge, Expertise, Improved initiative, Virulent Poison, Deadly Poison

Climate/Terrain: Warm forest and underground
Challenge Rating 11
Alignment: Chaotic Evil
Possessions: Double Standard

 Shassyndolossil is an extremely rare abomination; born with four heads, she is a mistake of nature among a race of such mistakes.  She loves jewelry and art, and enjoys dabbling in chemistry.  She makes pottery for a hobby, and serves her nest by making the horrible white resin that the Yuan-Ti use on its slaves.  She longs to take up the path of the psion, but so far the leaders of her nest have not allowed her to do so, afraid of her potential power.

Spell-like Abilities: 2/day - Animal Trance, Cause Fear, Deeper Darkness, Entangle, Neutralize poison, Suggestion, Polymorph Other. (8th Level Sorcerer DC15+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 17) 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 17 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 19); initial 1d6 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+6 points of damage with a successful grapple check (using the bite attack bonus if snake-headed) against Large or smaller creatures.

Heat Sense (Ex): Shassyndolossil 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.