What horror movie monster are you?

[ZenGum]

I would be a poison fog monster.

Silent, stealthy, I sneak through any gap, I kill young and old without distinction. I have no face to recognise, no slavering maw to devour you. You will know only the fear. I rust your cars, corrode your bridges. I leave dead fields and forests in my wake.

You cannot shoot me, stab me, crush me. I am immune to fire and freezing, except maybe involving liquid helium.

I am unstoppable!

Hey, you, get away from that damn fan. Bloody things should be illegal.