Supernatural Horror Story with Demons

I'm looking for a compelling supernatural horror story centered around demons. The tone should be mysterious and eerie, gradually building suspense and intrigue.

Ideal Skills and Experience:
- Proficient in crafting supernatural horror narratives.
- Experience with character and plot development in eerie and suspenseful contexts.
- A keen understanding of creating tension and unease in writing.
- Strong command of English, with excellent grammar and punctuation skills.

Please provide samples of similar work.