Ghosts are restless souls who cannot detach themselves from the world of the living. Ghosts are often people who have died an unnatural death. Some of them want to take revenge on those people who harmed them while they were alive, or have a general grudge against humanity and develop into vengeful spirits who, among other things, prey on innocent people.
A soul can also be held in the world of the living by a curse. Usually, these spirits are then bound to an object, such as a piece of jewelry, which must be destroyed or returned to the corpse of the afflicted person so that the troubled soul can find peace. Spirits can also be invoked for abusive purposes. Thus, through certain rituals, it is possible to summon a spirit of vengeance and bind it to a person so that he or she will be persecuted. This type of invocation is difficult to solve and requires special knowledge of necromancy.