Pyromaniac

The need to destroy and kill monster was needed on the vast world they found themselves in. A modern world, where magic was found within humans, and guns adapted to tear rough skin.
A mysterious man, carrying only a flamethrower, showed one day, around 7 years ago. He quickly rose through the ranks, and no one ever found out anything about him. Never spoke a word, finished his jobs and would reappear only when there was more. A mysterious and menacing legend.