This creature looks like a beautiful human woman from the waist up, but below is the body and tail of an immense snake.
Lamia Matriarch (CR 8)
CE Large Monstrous Humanoid (Reptilian)
Init +4; Senses Darkvision 60 ft., low-light vision, scent; Perception +3
AC 22, touch 14; flat-footed 17 (+4 dex, +1 dodge, +8 natural, -1 size)
hp 102 (12d10+36)
Fort +7, Ref +12, Will +11
Immune Mind-affecting effects
Speed 40 ft., Climb 40 ft., Swim 40 ft.
Melee +1 Scimitars +14/+14/+9/+9/+4 (1d6+6/15-20 plus 1 wisdom drain on first hit each round), or Touch +16 (1d4 Wisdom drain)
Space 10 ft.; Reach 10 ft.
Special Attacks Entice, Wisdom Drain
Spells Known (FC CL 12th, Concentration +17)
At will (DC 15) – Charm, Disguise Self
1st (DC 16) – Cure, Mage Armor, Sleep
2nd (DC 17) – Blur, Cure II, Minor Image
3rd (DC 18) – Cura, Cure III, Dispel, Haste, Major Image, Sleepga
4th (DC 19) – Esuna, Shadow Step, Vanish
5th (DC 20) – Curaga
Str 20, Dex 19, Con 17, Int 16, Wis 16, Cha 21
Base Atk +12; CMB +18; CMD 32 (can’t be tripped)
Feats Dodge, Double Slice, Improved Critical (scimitar), Improved Two-Weapon Fighting, Two-Weapon Fighting, Weapon Focus (scimitar)
Skills Acrobatics +8 (+12 jump), Bluff +21, Climb +13, Diplomacy +11, Disguise +11, Intimidate +20, Knowledge (any one) +15, Knowledge (arcana) +15, Spellcraft +15, Swim +13, Use Magic Device +21; Racial Modifiers +4 Acrobatics, +4 Bluff, +4 Use Magic Device
Language Abyssal, Common, Draconic
SQ Change Shape (fixed Medium humanoid form, alter self), Undersized Weapons
Gear 2 +1 Scimitars, 5th-lvl illusionist or white mage scroll
Undersized Weapons (Ex)
Although a lamia matriarch is Large, its upper torso is the same size as that of a Medium humanoid. As a result, lamia matriarchs wield weapons as if they were one size category smaller than their actual size (Medium for most lamias).
A lamia matriarch blows a kiss towards her target as pink hearts are being thrown from her lips towards him. The target must make a Will save (DC 20) or be affected as if by a Charm spell for a duration of 1 minute. The charm effect on this ability is harder to overcome unlike other charm spells and has its DC increase by 1. Blue mages may learn this ability as a 4th level spell (Knowledge: Local DC 23).
Wisdom Drain (Su)
A lamia matriarch drains 1d4 points of Wisdom each time it hits with its melee touch attack. (Unlike with other kinds of ability drain attacks, a lamia matriarch does not heal any damage when it uses its Wisdom drain.) Lamia matriarchs try to use this power early in an encounter to make foes more susceptible to charm.