Drider Vampire (CR 9)

Large Undead
Alignment: Always chaotic evil
Initiative: +8 (Dex); Senses: darkvision 60 ft., Listen +23, and Spot +23

AC: 25 (-1 size, +4 Dex, +12 natural), touch 13, flat-footed 21
Hit Dice: 6d12 (39 hp); DR: 10/magic
Fort +2, Ref +8, Will +9
Speed: 30 ft., climb 15 ft.
Space: 10 ft./5 ft.
Base Attack +4; Grapple +10
Attack: Claw +7 melee or bite +7 melee
Full Attack: 2 claws +7 melee and bite +5 melee
Damage: Claw 1d8+5 plus energy drain, bite 1d6+2
Special Attacks/Actions: Attach, blood drain, energy drain, spell-like abilities, spells, spider mastery
Abilities: Str 21, Dex 19, Con -, Int 17, Wis 18, Cha 20
Special Qualities: Alternate form, cold resistance 20, electricity resistance 20, fast healing 5, gaseous form, SR 19, turn resistance +4
Feats: Alertness; Combat Reflexes; Dodge; Improved Initiative; Lightning Reflexes; Mobility; Multiattack; Two-Weapon Fighting
Skills: Bluff +22, Climb +13, Concentration +14, Hide +17, Listen +23, Move Silently +21, Search +11, Sense Motive +12, Spellcraft +12, and Spot +23
Advancement: By character class
Climate/Terrain: Underground
Organization: Solitary
Treasure: Double standard

Source: City of the Spider Queen

These undead abominations are creatures of pure hatred and malice, filled with loathing for everything that lives. Though a drider vampire drinks blood and has other abilities that resemble those of a common humanoid vampire, the two are actually quite different creatures.

A drider vampire looks much as it did in life, with the head and torso of a drow and the lower body of a drider. Its hands are wickedly clawed, and from its mouth protrude huge fangs like those of a venomous spider.