There are several feats & abilties a shapechanger can take that would significantly help them take the place of a person.
( Monster, Mosters Handbook & Eberon Books )
Perfect Reflection [Changeling]
You are particularly skilled at mimicking the forms and mannerisms of others. The better you know a specific
individual, the more able you are to look and act just like that person. Some changelings attribute this ability to a
trace of their doppelganger ancestors' ability to peer into the minds of others.
Prerequisite: Changeling, Cha 15, Wis 13.
Benefit: When using your minor shapechange ability to disguise yourself, you get a competence bonus on your
Disguise check and on Bluff checks made to impersonate that person. The bonus is based on how well you know the
person you are imitating. While these categories are simitar to the categories that determine a character's bonus on Spot
checks to see through a disguise, the amount of the bonus is not the same.
Familiarity Bluff/Disguise Bonus
Recognize on sight +2
Friend or associate +4
Individual is present +6
Close friend +8
Intimate +10
PERSONA IMMERSION [RACIAL]
Your assumption of another’s physical identity grants you defenses against mental intrusion.
Prerequisite: Changeling.
Benefit: While under the effect of your minor change shape ability, if you make a successful save
against a divination spell or telepathic psionic power of 3rd level or lower, you can generate a misleading
result. Though you don’t learn the precise spell or power being used against you, you know what type of
information is sought and can respond accordingly. For example, a character with this feat who successfully
saves against detect thoughts knows that his surface thoughts are being probed, and can thus supply any
specifi c thoughts that he wishes to be detected by the caster.
RACIAL EMULATION [RACIAL]
You can emulate a humanoid more closely with your minor change shape ability.
Prerequisite: Changeling.
Benefit: When you use your minor change shape ability to assume the form of a humanoid
creature, you can also emulate any of that humanoid’s subtypes.
Though you do not gain any of the humanoid’s traits, you are considered to be a member of that
race for all other purposes (allowing you to use magic items or spells keyed to race, for example).
You can also ignore the normal penalty on Disguise checks when disguising yourself as a different race
(see the Disguise skill description, page 72 of the Player’s Handbook).
You can only emulate one race at a time, and you always retain the shapechanger subtype.
Imprint Target (General)
By carefully studying a particular person, you learn his mannerisms, motions & modes of speach. If you later use
your shapechanging ability to duplicate him, you are dificult to spot as an imposter.
Prerequisite: Shapechanger
Benefit: For each day you spend studying a person, you gain a cumulative +2 circumstance bonus to Disguise checks
you make after using your shapchanging abilities to copy his appearance. You may gain a maximum bonus of +10
with this feat
Defensive Shapshifting (General)
By timing your shapechanging, you can cause your opponent to misjudge your position & miss their attacks.
Prerequisite: Shapechanger, Rapid Transformation, Shifters Dodge
Benefit: You may hold your action to change shape in response to an opponents attack. On that attack, you
change shape & cause your opponent to suffer a 50% miss chance against you. Just as your opponent lines up his
attack, you change forms& leave him aiming at air.
Rapid Transformation (General)
You have learned to take on a new form with incredible speed. While other shapechangers must
concentrate on their transformations, you shift with barely a thought.
Prerequisite: Shapchanger
Benefit: When using your shapchanging abilties, whether special abiltites or by spell, you
may change your shape as a free action. However you may change your form only once per round.
Alien Intellect (EX): The shapechangers ability to assume new forms extends to its personality & psyche.
The creature has a wholly alien way of viewing the world, making it immune to all mind-influencing effects.
Magic designed to alter a creatures thought process is useless against their bizarre personalities,
which mingle human, animal & alien patterns.
Relative cost: NA; Absolute Cost: 25 CP points. Prerequistes: Shapchanger
Malleable Alignment (SU) Not only can some shapchangers alter their physical forms,
but also have the magiccal ability to modify their magical & psychic signature. When
changing forms, shapechangers with this ability may opt to alter their effective alignment for
purposes of all divinations. When targeted by a spell such as detect evil , the creature is allowed
a WILL save against the spell. Determine the save DC as normal (10+spell level + ability modifier)
Relative Cost: NA; Absolute Cost: 15 CP; Prerequisite: Shapchanger