Serpent Sibyl: Female half-fiend yuan-ti abomination
Ftr5/Sor6; CR 20; Large outsider (evil); HD 9d8+45 (half-fiend) plus 5d10+25
(Ftr) plus 6d4+30 (Sor); hp 182; Init +9; Spd 30 ft., climb 20 ft., swim
20 ft., fly 30 ft. (average); AC 28 (touch 14, flat-footed 23); Atk +24
melee (1d8+8, bite), +19 melee (1d6+4, 4 claws); or +27/+22/+17+12 melee
(2d6+16 plus 1d6 fire/19-20, Huge +2 flaming spiked chain); or +23/+18/+13/+8
ranged (2d6+8/x3, Huge +1 mighty (+6) composite longbow with +1 arrows);
Reach 10 ft. (20 ft. with chain); SA improved grab, constrict (1d6+10),
psionics, spell-like abilities; SQ acid, cold, electricity, and fire resistance
20, poison immunity, outsider traits; SR 16; AL NE; SV Fort +17, Ref +14,
Will +18; Str 26, Dex 20, Con 21, Int 20, Wis 22, Cha 24.
and Feats: Bluff +17, Climb +16, Concentration +20, Diplomacy +19,
Hide +13, Intimidate +19, Knowledge (arcana) +20, Knowledge (local) +12,
Knowledge (planes) +14, Knowledge (religion) +12, Listen +17, Move Silently
+12, Search +12, Spellcraft +11, Spot +17; Alertness, Blind-Fight, Dodge,
Exotic Weapon Proficiency (spiked chain), Expertise, Improved Critical
(spiked chain), Improved Initiative, Power Attack, Weapon Focus (spiked
chain), Weapon Specialization (spiked chain).
Grab (Ex): To use this ability, the Serpent Sibyl must hit with her
bite attack. If she gets a hold, she can constrict.
(Ex): The Serpent Sibyl crushes the opponent, dealing 1d6+7 points
of bludgeoning damage, after making a successful grapple check.
(Sp): Detect poison, alternate form (Tiny to Large viper, as
shapechange), chameleon power (+8 to hide), produce
acid (1d6 damage by touch), aversion (DC 29 Will save or avoid
snakes for 10 minutes).
Abilities (Sp): 3/day -- darkness, poison; 1/day -- animal
trance, cause fear, deeper darkness, desecrate, entangle, neutralize poison,
suggestion, polymorph other, and unholy blight. These abilities
are as the spell cast by a 9th-level sorcerer (save DC = 19 + spell level).
Traits: Darkvision 60 ft.; cannot be raised or resurrected (though
a wish or miracle spell can restore life).
Spells Known: (6/8/7/5; base DC = 19 + spell level): 0 -- arcane
mark, detect magic, flare, light, ray of frost, read magic, resistance;
1st -- cause fear, mage armor, magic missile, true strike;
2nd -- alter self, Melf's acid arrow; 3rd -- lightning bolt.
Huge +2 flaming spiked chain, Huge +1 mighty (+6) composite
longbow, 20 +1 arrows, +3 bracers of armor.
of a yuan-ti abomination and a marilith demon, the creature known as the
Serpent Sibyl is a thing of terror. She looks like a large serpent, about
14 feet long, with thick black scales and glowing red eyes. Four humanoid
arms, also covered in scales, protrude from her body below her neck. She
uses two for spellcasting, while two wield her massive spiked chain. Two
great wings, like the wings of a pterodactyl, stretch from her back near
Sibyl believes herself to be a reincarnation of Sseth, the avatar of Set
who ruled Serpentes a thousand years ago. Her followers believe so, too.
She is coldly arrogant, cruel, and despotic, but she has the ability to
inspire her followers -- stirring them with visions of the grandeur of
their ancient empires, spurring them on to regain that lost glory. She
herself believes wholeheartedly in that vision, and imagines herself ruling
a new, grander yuan-ti empire for centuries, just as Sseth did.
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