Originally, Flame Dragons inhabited a planet abound with active volcanos. The severe natural environment there forced Flame Dragons to evolve scales that are nearly unbreakable and fireproof. In addition, to avoid volcanic eruptions that spew molten rocks hundreds of meters in the air, Flame Dragons learned to fly. They are skillful and fly in a very unique way by harnessing hot airflows. What needs special attention is their ruthless nature. The Saluk preserved that nature when mechanizing the dragons so that they can be more effective in combats. As a result, only the most experienced officers in the Flame Dragon Cavalry can harness them.