The Smoke Assassins [Inktober Prompt #22 Ghost]

Introduction:

The only ones who know of the real existence of the Smoke Assassins are the kings and Queens of Lahar. To everyone else, the Myth is just that a story that can't possibly be true.
The assassins are known for their prowess is stealth and silence. They use the concealment of thick smoke to cover their presence as they quickly and decisively take out their targets, never to be seen or heard from again.
The assassins train high in the mountains with the choking clouds of soot ever being in the presence of the assassin. Training in thick soot and smoke has allowed them to adapt to their environment, making them deadly killers when inside of their smoke.