C193 Subterranean sound

The situation now was too strange. Lightning flashed outside one after another, as if it was the end of the world, as if it wanted to tear the already gloomy sky into two.

Those streaks of lightning caused the clouds in the surroundings to turn a dull red, sinister and terrifying.

I felt that even in this cloud, there seemed to be a demonic power looking down from above, observing everything