Demons are believed to be the hidden cause of all of humankind's problems, including physical and mental illness, bad luck, pain, and suffering. They are much more powerful than human spirits and have abilities that humans don't possess, whether alive or in spirit form. These abilities include telepathy and telekinesis.

Demons use these supernatural abilities to weaken and torment their victims. Telepathy allows them to uncover a victim's fear or worry and use this knowledge against them. Telekinesis combined with demons' evil and violent tendencies allow them to move larger objects and even scratch, push, or hit victims.

In whatever form a demon takes, its intentions are always the same. They aim to break down their victim's free will, and weaken them so that they can possess and control them. As well as possessing humans, demons can also attach themselves to objects, most commonly dolls and children's toys.

Demonic hauntings, which can spontaneously...