Note: I had this dream 2 years ago when I was a lukewarm Christian, prior to reading the Book of Revelation.

In this dream, I saw the sky red. There were no mountains or structures, and the earth was flat.
People were hiding in caves and I was given a flaming sword in a cave.
In this cave, I was with someone I knew in real-life and had the feeling I needed to use the flaming sword to destroy demons (didn’t see demons in my dream, just knew what I had to do).

The dream ends and I wake up.