Okay then, in that case we don't have to have the "magical" flamethrower, because it's your setting.
EDIT: I hope that you allow the stitchpunks though...
And it would add depth because there would be two levels of the story going on, the humans trying to survive the environment, and the stitchpunks trying to survive the wild animals (which, in their opinion, includes the humans).
See? Depth!