A poltergeist is an angry spirit that forms from the soul of a creature that, for whatever reason, becomes unable to leave the site of its death. Sometimes, this might be due to an unfinished task- other times, it might be due to a powerful necromantic effect. Desecrating a grave site by building a structure over the body below is the most common method of accidentally creating a poltergeist. The poltergeist experiences great trauma over its condition; this trauma twists its psyche to evil and fosters an overall hatred of the living expressed in outbursts of rage. A poltergeist is bound to a specific place, usually a building, room, or recognizable area (a section of a cemetery, a stretch of lonely road, and so on). This place typically corresponds to its place of death or the resting place of its mortal remains.