Mysteries of the Ninth Grade Weapon Chapter 406

Dragon scale fire is not real fire, but a kind of firework.

To be precise, it is a signal smoke.

This thing is made of special materials and is rare in the world. Once it is ignited, people within a radius of twenty miles can see the bright flames in the air and hear the sharp and piercing sound it makes.

Whether it is night or day, its light is not diminished and its sound is not damaged.

The name "Dragon Scale" indicates that it is not an ordinary thing and is not something that ordinary people can use.