Doppelgangers are magical creatures with the ability to mimic the powers of any living thing they have touched. The doppelganger starts out  relatively weak, but given time and experience, they can shift into almost any form and infiltrate into almost any place.

Doppelganger motives are highly suspect, since no one really knows what they hope to gain or where they come from. Doppelgangers usually react violently when they are found out, trying to kill any and all witness to their subterfuge. If unable to recover their guise, they will attempt to flee, assuming any form they think will aid them in their escape.

To make matters worse, some doppelgangers will trap creatures and people merely to add to their mastery of know forms. And to ensure that they are not found out, they will kill the victims after they touch them. This gives them an evil reputation to say the least.