Death smoke

Death smoke was a spell used by wizards in Anauroch and Zakhara, the Land of Fate.

Effects
This spell created a cloud of dark noxious gas that could not be blown or burned away. Creatures that needed to breathe suffered physical damage while they remained within the cloud. Death smoke was heavier than air so flowed down stairs and crevasses with ease.

Components
This spell required a crushed insect or arachnid and a pinch of sand to cast.