You could end it with a sudden plot twist like the villain turning out to be the hero's long-forgotten twin, or the haunted place being a portal to another dimension.
One way is to introduce a completely unexpected character at the end who changes everything. Maybe it's someone the main character thought was dead or a long-lost relative with a dark secret.
One way is to have a seemingly happy ending, but then show a creepy detail that suggests it's not over. Maybe a shadow in the background or a strange noise. This leaves the reader with a sense of unease.
Well, you could introduce a new element or character in the final moments that turns the story on its head. Or, you might choose to resolve the main conflict in a way that no one saw coming. The key is to surprise and engage the readers till the very last page.
One way is to have a character who was thought to be good turn out to be bad. Or maybe have a seemingly solved problem come back in an unexpected way. The key is to surprise the audience.
One way is to have the protagonist make a decision that goes against what was expected. Explain how this sudden change adds a twist. Also, leaving a cliffhanger can make the ending more intriguing.
Well, one way to end is to have the characters reflect on the impact of the plot twist and make choices that lead to a conclusive ending. You could also introduce new elements that build on the twist but don't overcomplicate things.
You could write about a man who inherits an antique mirror from his deceased grandmother. When he hangs it in his bedroom, he notices that there are strange reflections in it at night. The reflection shows a different version of his room, with dark, shadowy figures moving around. As he stares into the mirror more often, he starts to feel a presence trying to reach out from the other side, and he realizes that the mirror might be a portal to a haunted dimension.
The end twist is so unexpected. It involves a character's true identity being revealed, which has huge implications for the story's outcome.
You could have a sudden twist or reveal that leaves the reader shocked. Like, showing that the monster was actually a misunderstood creature all along.
You might end it with the protagonist about to make a crucial decision that could have life or death consequences, but we don't know what they'll choose.
A scary twist could be that Cinderella's fairy godmother was actually an evil spirit. She gave Cinderella the beautiful dress and carriage not out of kindness but to use her as a sacrifice. When Cinderella arrived at the ball, the prince was also in on the plan. They planned to sacrifice her at midnight when the magic would wear off, and Cinderella would be at her weakest.