Editing Ghost (section)

=General Biology and Weakness in various depiction=
Spiritualists theorized that ghosts were made out of a spiritual substance called '''Ectoplasm''' (In greek Ecto means "outside", and plasma means "something formed or molded"). This idea was never accept by science, but is widespread in pop culture.

Ghost are generally unharmed by any physical means (arrow, swords, bullets). In certain depiction they can be harmed by flame. To truly able to damage them, any kinds of magical enchanted weapon is needed. In a more modern science fiction setting, [[Psionics|psychic power]] from a person can harm them with their power.

To combat ghost without magic or psychic power, there are scientists in some modern setting that combats them with some sort of electrical devices that shoots lightning. Most notably in '''Ghostbusters''', a nuclear powered device called '''particle accelerator system''' (or Proton Pack) is used to create a charged particle beam that can restrain ghosts (also known as negatively charged ectoplasmic entities in the movie setting).

Ghost often roam in the wild at night, and will have to avoid burnt to a crisp by hiding in abandon houses or caves when the sun comes up. Some ghost prefer to stay beside their dead body and were unable to passed on into the afterlife (unless the Grim Reaper (aka the personification of death) would come and manually claim their souls).