Uncommon N Medium Humanoid
Senses Perception +7; darkvision
Languages Common, two other languages
Skills Deception +11, Diplomacy +11, Society +8, Stealth +8
Str +3, Dex +3, Con +0, Int +1, Wis +2, Cha +4
AC 18; Fort +5, Ref +10, Will +11
End the Charade (attack); Trigger The doppelganger is transformed with Change Shape and another creature moves adjacent to it or takes a hostile action against it.; Effect The doppelganger reverts to its natural form and can make a Strike against the triggering creature. If the creature was unaware the doppelganger was in disguise, that creature is flat-footed against this attack.
Speed 25 feet
Melee claw +10 (agile), Damage 2d6+5 slashing
Arcane Innate Spells DC 21; 3rd mind reading (at will)
Change Shape (arcane, concentrate, polymorph, transmutation) The doppelganger takes on the specific appearance of any Small or Medium humanoid who it has seen and whose appearance it remembers. This doesn't change the doppelganger's Speed or its attack and damage bonuses with its Strikes but might change the damage type its Strikes deal (typically to bludgeoning).
In their natural forms, doppelgangers are humanoid creatures with flesh of indeterminate color and features that lack fine details, as if unfinished. As masters of mimicry, they use their abilities to impersonate others in devious ways, often infiltrating settlements and residing within them for years without being detected.
Doppelgangers are incredibly secretive, with some nearing outright paranoia. They choose their targets carefully and go to great lengths not to reveal their intentions before their plans come to fruition. Doppelgangers usually infiltrate communities in order to gain some manner of wealth or power, and assume the guises of other (usually influential) persons to allow the creatures they're impersonating to take the fall for any negative consequences that may result from their actions.
Though most are not evil, doppelgangers are manipulative and self-serving. As they don't have their own society and aren't monolithic in their motivations, an individual doppelganger has its own unique interests and impulses, though many are over-indulgent. Some doppelgangers enjoy the thrill of subtlety, while others favor grander schemes, such as manipulating a nation's political infrastructure. Others seek to exploit merchant guilds to gain immense wealth, while others use their shape-changing ability to destroy relationships between close friends or families.
Doppelgangers are careful and patient creatures. They are willing to slowly construct elaborate schemes that may require extended periods of time—even decades—to yield results.
Doppelgangers often work alone, as they don't trust potential cohorts not to ruin their plans. There are rare times when doppelgangers might reveal secrets to high-ranking individuals to ensure a successful infiltration.
When they do work with others, it's because they've taken the shape of a target group's leader, unbeknownst to the organization's members.
Doppelgangers can grow in power by learning skills and abilities, and often make excellent rogues, spellcasters, or fighters. A doppelganger that has class abilities can often effectively infiltrate and plague an adventuring group as a powerful antagonist—but using a doppelganger like this in your game should be handled with care (see the Infiltrating a Party sidebar above for more information).