Changeling

Changelings are a mythical species with the ability to morph their shape into the appearance of other small or medium humanoids. In some cultures, they are considered a type of Nuxrid and Rubenians consider them a type of Cyanhemian

Show spoiler

Changelings are real and used among the very rich and powerful as assassins, spies and extorters. They are not born changelings, but becomes one through ancient, powerful magical artifacts held by a secret order. They are taken as children and molded into what the order wants them to be. Some have escaped the order, going freelance or attempting to live a normal life.