Anguineum Ophiduan1
This horrific creature appears to be a great serpent with vaguely humanoid features, a split tail, and two clawed arms.

Anguineum Ophiduan (CR 7; XP 3,200)

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CE Medium monstrous humanoid
Init +5; Senses darkvision 60 ft., scent; Perception +15
Defense
AC 22, touch 11, flat-footed 21
(+5 armor, +1 Dex, +6 natural)
hp 85 (9d10+36)
Fort +7, Ref +7, Will +9
Immune poison; SR 18
Offense
Speed 30 ft.
Melee mwk spiked chain +14/+9 (2d4+6), bite +9 (1d6+2 plus poison)
Ranged mwk longbow +11/+6 (1d8/x3) or spit +11 touch (blind and poison)
Special Attacks ophidiophobia (W-DC 20)
Spell-Like Abilities* (CL 7th; concentration +11/+15)
At will—deep slumber (W-DC 17), entangle (R-DC 15), hypnotism (W-DC 15)
3/day—charm monster (W-DC 18), deeper darkness, freedom of movement
Statistics
Str 19, Dex 13, Con 18, Int 17, Wis 17, Cha 18
Base Atk +9; CMB +13; CMD 24 (can’t be tripped)
Feats Ability Focus (ophidiophobia), Combat Casting, Diehard, Endurance, Improved Initiative
Skills Intimidate +16, Knowledge (history) +12, Knowledge (religion) +12, Perception +15, Spellcraft +12, Stealth +9, Survival +15; ACP -4
Language Common, Undercommon, plus 1 other; speak with serpents
Ecology
Environment jungle, underground
Organization solitary, pair, clutch (3–5), nest (2–5 hominis, 2–13 semiferum, and 2–4 anguineum), or brood (10–80 hominis, 20–160 semiferum, and 10–40 anguineum)
Treasure double (longbow, spiked chain, ophiduan scale, other treasure)
Special Abilities
Blind (Ex) The spit of an anguineum ophiduan may blind an opponent for 4 rounds if they fail a Reflex save DC 18. The save DC is Constitution-based.
Ophidiophobia (Su) As the hominis ophiduan.
Poison (Ex) Bite—injury or Spit—contact, save DC 18; frequency 1/round for 6 rounds; effect 1d3 Constitution; save 2 consecutive saves. The save DC is Constitution-based.

The oldest of the ophiduan castes, the anguineum are the true progenitors of the race, and the creators of the other ophiduan. The anguineum are an ancient race, older than humanity and even, according to their own myth, older than elves. They are merciless, predatory, and despise the fact that mammals are currently the dominant civilized species.

For most of their recorded history, the anguineum ruled the ophiduan, but they were eventually overthrown by their own creation, the hominis caste. While any given anguineum is more powerful than a hominis, the hominis’ greater intelligence, and their aptitude for clerical magic, allowed them to prevail. While some anguineum still resent their reduced position in society, most now accept it as the will of their unnamed god. Should his will ever dictate that the anguineum rise again, then circumstances will permit them to do so.

As with the other ophiduan, anguineum are covered in snake-like scales, though theirs are thicker than those of their brethren. Anguineum ophiduan are actually long enough that they should seem to qualify as large creatures. Due to their distribution of weight, however, and the fact that much of that length is in the tail, they mechanically qualify as medium. They average around 400 pounds. Anguineum are able to wield spiked chains as one-handed weapons due to their unique shape.