The Incarnate is a truly evil being of unknown origin. In its natural state, it appears to be a figureless mass of energy. The Incarnate possesses another creature's body, and is most frequently encountered as a host creature. A possessed host has its soul driven from its body, but retains all of its natural abilities. Incarnates start by taking over lowly life forms and gradually progress to more and more powerful creatures. There are stories that even heroes have fallen victim to Incarnates.
After an Incarnate leaves its host by a successful transfer, the former host dies instantly as its soul has already left its body. If a still-possessed host body is killed, the Incarnate is freed and returns to its natural form, revealing its true nature.