Shade
A shade is an undead creature that is spawned by the remnants of corrupted memory or emotion. It is most often associated with a haunting, and a shade almost always is encountered while it possesses a target. A shade is very territorial, and it will use its host to assault the living when threatened.
Haunting Dweller. A shade typically possesses a haunted area which is normally dormant. When a shade is angered or threatened, its haunted environment will awaken and become hostile. A shade will always have control over a spiritwell or as many spiritfonts it can control in its abode. It may also be the source of a spiritwell.
Creature of Spirit. A shade can’t be polymorphed against its will.
Undead Nature. A shade doesn’t require air, food, drink, or sleep.