Well, it could be the atmosphere described in the story. If it creates a really dark and eerie feeling, that would make it scary.
Perhaps the unknown elements in 'the spot scary story'. When there are things that are not fully explained, like a strange mark or a sound coming from the spot without any obvious source, it can be terrifying. It plays on people's fear of the unknown.
The unknown nature of it. We don't know what the red spot really is, whether it's a sign of something evil or a portal to a bad place.
The mystery around the red spot. Not knowing what it is or what it represents can be really scary.
The unknown elements in 'the spot scary stories' make them scary. For example, in many stories, there are things that happen without any clear explanation. It could be a sudden noise in an empty room or a strange figure that appears and disappears. This lack of understanding makes our minds create the worst - case scenarios, which is terrifying.
In the 'Scary Sally Story', it could be the sense of isolation that Sally feels that makes it so scary. If she is alone in a place where she can't get help easily, such as in an old mansion in the middle of nowhere. And if there are things that seem to be out of place or not normal, like objects moving by themselves or strange voices whispering in her ear. The combination of being alone and these abnormal occurrences can be truly terrifying. It also might be that Sally herself is a relatable character, so readers or listeners can put themselves in her shoes and feel the fear more intensely.
The mystery surrounding Gengar adds to the fear factor. We don't really know where it comes from or what its true motives are in a scary story. It could be lurking anywhere, waiting to play a cruel trick on an unsuspecting victim. It might be hiding in the corner of a spooky attic or in the bushes outside a lonely house, and this sense of the unknown makes it extremely scary.
The atmosphere. If it's set in a dark, isolated place, it can be really frightening.
His actions might make him scary. For instance, if he stalks people in the story or does something really cruel to his victims. Also, the mystery surrounding him. If no one knows where he came from or what his motives are, that adds to the scariness.
The setting of the story might make it scary too. If the bear is in a place where people feel they should be safe, like a backyard or a small town. And if the characters in the story are helpless against the bear, like they don't have any proper weapons or means of protection. The idea that the bear can overpower them easily makes the 'the scary bear story' a truly scary one.
It could be the setting. If the story takes place in a spooky location like an old cemetery or a haunted house, that would make it scary.
Perhaps the way the thumb is described in the story. If it's described as being pale, with long and sharp nails, or if it has some sort of oozing substance on it, that would make it quite scary. Also, if the thumb is associated with some sort of dark magic or a curse. For instance, in the story, whenever the thumb is present, bad things start to happen to the people around it. It could be that people start having nightmares, or they see strange apparitions, all related to the presence of this thumb. And it keeps getting closer and closer to the main characters, creating a sense of impending doom.