The Curse of the Blood - Red Moon. The combination of a curse and a blood - red moon is very ominous. A curse implies something bad is going to happen and the red moon is often seen as a sign of impending doom in horror lore.
A good title of horror story often creates a sense of mystery and unease. For example, titles that imply something lurking in the shadows or an unknown danger are effective. Words like 'haunted', 'cursed', or 'forbidden' can be very powerful in a horror story title.
The Haunting Shadows. It gives a sense of something menacing and unseen lurking in the darkness, which is a classic horror element. Shadows can move on their own, reach out, and instill fear in the characters and the readers alike.
A good horror story title should be mysterious and create a sense of dread. Something like 'The Haunting of Midnight' or 'The Shadows of Fear' works well.
The Shadow Man. A simple yet effective title. It makes you think of a figure made of shadow that haunts people. It could be that the shadow man can enter people's dreams or appear out of nowhere when they are alone in the dark.