Sack of Smoke Bombs (artifact)
'Smokers' are a fairly recent alchemical invention used by the Anti-Magic Orders of Chevalie in their efforts to even the playing field against Liches, Magi, and everyone else. Inspired by Sarradonian inventions observed on the Marcher's adventures in the south, these devices make a rather impressive cloud that obscures anything within it at the lighting of a simple fuse. You imagine breathing too much of it in would not be particularly healthy.