gasmask, a area 4 were you need a gasmask, a mini boss in the area and a new weapon#259

hi can you add a toxic area on the map were you need a gasmask to survive.
the area must be very hard but it also shold give great rewards.
ps! in the area a part there is called the bosses lair and here is a very hard mini boss with grenade launchers, rpgs and miniguns and killing the boss gives you titanium scrap boss rpg and some other high end stuff.

Please don’t put multiple suggestions in the same post, it makes it hard to classify. As all of your ideas have already been suggested or are planned, I’ll be merging it with the most relevant one.