Horror Story -

Keep your monster or threat partially hidden. Letting the reader's imagination fill in the blanks is often more terrifying than a full description.

No hallway, no furniture, no Elias. Just a flat, silver void. Then, a face pressed against the inside of the glass. It was his own face, distorted by a scream, palms slamming against the surface of the mirror from the other side. Horror Story

In the mirror, the reflection screamed, but no sound came out. In the real world, Elias felt a cold, wet breath against his ear. "Found you," a voice rasped, sounding exactly like his own. Keep your monster or threat partially hidden