ghost (the soul or spirit of a being, which remains for some reason or other in the Realm of Time and Consequence; ghosts unlike phantoms are thinking entities and run the spectrum of helpful to malevolent; some ghosts are rovers, others are attached to a spot, person or object, while some remain in their corpses and can animate them, particularly if disturbed; many types exist)
malevolent spirit/entity ('shadow people' are an example; evil apparitions and killer spirits, etc; malevolent entities are often very difficult to explain, and usually require exorcism to drive away or destroy; most are attracted by some act of violence, evil, malevolence but that is no sure reason and others appear inexplicably; poltergeists are actually a type of malevolent incorporeal entity but are near the least-harmful end of the spectrum; other entities are absolutely deadly; unlike ghosts - even the malicious ones - malevolent spirits are independent entities, not the souls or spirits of those who have died; malevolent entities can be rovers, attached to an object or place, or animate an object or corpse; many types exist)
mummy (the ancient dead; among the most powerful of the undead, the most potent mummies are a match for even the greatest of foes and are often extraordinarily difficult to destroy; mummies often retain all their former intellect, and those who weave magic can be a great force of destruction; warrior mummies retain all of their former prowess, gaining supernatural strength and endurance in undeath - they too become engines of annihilation)
phantom (can easily fool a person into thinking it is a ghost or malevolent entity, though the phantom is not the soul or spirit of a person, animal or creature, but rather something that remains and is often triggered by the actions of the living; for example, the panting of a beloved pet is heard when someone picks up his old ball, etc - unless a phantom induces, by accident, panic that results in injury, it is harmless)
poltergeist (nasty, invisible little malevolent entity that can make life miserable but is not deadly or, after all is said and done, particularly destructive; often attach to a person who is undergoing strong emotional turmoil; poltergeists can be exorcized, will leave when the person's emotions return to a normal state or when they become "bored")
revenant (ghost or animated corpse that returns from the grave to terrorize the living - often to stalk, terrorize and even kill one who wronged the deceased; some return to harass their former families, clan, etc.)
skeleton (usually an animated form of undead - can be from any creature's skeleton - some are revenants who return to torment or even kill; these are far more powerful on average; an example of a skeletal revenant is the boy who returned from death after being abused by his parents; he appeared every night in skeletal form, playing a horn, until he drove them to utter insanity)
vampire (vampires take many forms, in general their body's "normal" form is that of the former person; some decay to a point and become utterly horrible; others retain an ageless - if cold - beauty; many can change shape, some of the eldest become immune to the killing ability of sunlight though they always attempt to avoid it if possible; killing a vampire, particularly one immune to the sunlight, can be achieved by staking its heart which keeps it in place and completely removing its head from its body)
wraith (arrach; vengeful, often hateful malevolent entity; incorporeal; usual form is a figure shrouded in a hooded robe, with often incredibly long fingers and claws protruding from the sleeves; wraiths can have a target, basically ignoring everyone else, or simply attempt to slay anyone they encounter; wraiths can feed on the living by drawing off their life energy and this can eventually result in sickness and death depending on how long / often the wraith feeds; they can also rend a victim with supernatural strength - often from within the victim's body - or inflict pestilence; some wraiths can inflict a hideous wasting on a victim, in some cases resulting in rapid decay even before death; wraiths are some of the most feared and powerful of malevolent entities and seem driven only by vengeance or malice)
zombie (reanimated corpse; often slow, easy to avoid and in some cases destroy through decapitation, in a group zombies can become almost unstoppable and relentlessly pursue and attack their prey)
