Mines of Paldemar
Doppelgangers are humanoids that are capable of shapeshifting into other humanoids.
The group has encountered at least one Doppelganger in their adventures so far. An agent of the Black Spider, he transformed into Psy’Cho and created much confusion.
The Doppelganger the group fought was able to even match his targets clothing. It is currently unknown whether this is a universal trait or a skill possessed by that particular person.
The Doppelganger was able to cast spells as though her were Psy’Cho. The details of this area also unknown.
Is is known however that they can read thoughts.