say your standing around many burning kilns and fires ovens and stuff (10-20) in close proximity, and you'v been standing there awhile (30 or so mins)
you'll see a pair of smoke hand wraped around neck and every 30 mins you stand there you take asphyxiation damage (low amounts) it wont do much but could add a lil bit to lighting and standing around many fires
mabye also while lighting fire theres a small chance to take very small amounts of asphyxiation damage
i love posting ideas mabye too much lol