Class Skill: Climb.
Bonus Spells: charm person (3rd), web (5th), hold person
(7th), black tentacles (9th), dominate person (11th), veil
(13th), mass hold person (15th), screen (17th) and mass hold
monster (19th)
Bonus Feats: Agile Maneuvers, Improved Grapple, Improved Initiative,
Iron Will, Skill Focus (climb), Spell Focus (enchantment), Spell Focus (illusion),
Weapon Finesse
Bloodline Arcana: Whenever you cast a spell of the Enchantment or Illusion
schools, you are treated as if being both one caster level and one Hit Die higher
than you are. Whenever you cast a spell with the Fire descriptor, you reduce
your caster level by one (which, at 1st level, makes you incapable of casting
burning hands, for instance). Additionally, your mind-affecting spells function
unimpeded on mindless spiders, but not only any other sort of mindless vermin.
Bloodline Powers: The alien traits nesting within your flesh continue
to grow as your magical talents expand, resulting in several arachnid abilities.
Ensnaring Web (Sp): Starting at 1st level, you can take a standard action
hurl a tangled mass of spider [url=http://paizo.com/pathfinderRPG/prd/monsters/universalMonsterRules.html#web]
Arachnid Physiology (Ex): At 3rd level, your body undergoes subtle changes
that are not distinctive enough to warrant attention, but combine to give you
a +2 bonus to Perception checks, +1 Natural Armor and a Climb Speed equal to
half ground move (like all creatures with a Climb speed, you gain a +8 racial
bonus to Climb checks and can always take 10 on a Climb check, even if threatened
or distracted).
Venomous Bite (Ex): At 9th level, you gain the ability to make a poisonous
bite attack that counts as an armed attack and inflicts 1d6 piercing + ½
Str bonus as a secondary weapon at -5 to hit or 1d6 P + 1.5x Str bonus as a
primary attack at your full attack bonus. Poison (Ex) Bite - injury; save Fort
DC (10 + your Cha modifier + ½ your Sorcerer level); frequency 1/round
for rounds equal to your Charisma modifier; effect 1d2 Strength damage; cure
1 save. You can make this attack Cha mod + 3 times / day. This venom cannot
be extracted for other usage, and your venom-dripping mandibles only appear
during these attack actions, otherwise melting away into your regular facial
features.
Call of the Web (Sp): At 15th level, you gain the ability to use summon
monster VII as a spell-like ability to summon a single Bebilith and to cast
summon monster V to summon 1d4+1 Giant Spiders as a spell-like ability
a number of times equal to your Charisma modifier +3. You add your Charisma
modifier to your caster level to determine the duration of these spell-like
abilities, and the creatures summoned follow your mental commands, even if you
do not share a language with them. These spell-like abilities require a Standard
action to evoke, and you only require a free action to mentally command these
creatures.
Metamorphosis (Su): A 20th level, your transformation is complete, and
while you still appear as your previous race, your solid black eyes grant you
60 ft. darkvision and low-light vision, and the change to your body and soul
confer a +2 inherent bonus to both Dexterity and Charisma. At will, as a standard
action, you can Change Shape into an Aranea (+4 Dex, +4 Con, web) or Giant Spider
(+6 Dex, +2 Con, web), and the webbing you produce in these forms does not decay
like that of your Ensnaring Webs. You become immune to spells like charm
person, dominate person and hold person, as if you were a
Monstrous Humanoid (but do not gain other benefits of that creature Type), and
you can choose to return to your own form, ending any unwanted polymorph effect,
such as from a baleful polymorph or polymorph any object spell,
upon yourself as a free action on your turn.