Skaven Roommate

You come home from a long day at work. As you open the door to your apartment, you're greeted by a massive cloud of green smoke. Not this again! Your Skaven roommate, who is behind on his share of the rent, is smoking warpstone in the living room with all the windows closed. The Under-Empire economy must be really bad right now if even a Clan Eshin assassin can't find work, or maybe he should start saving his warpstone tokens instead of having them go up in smoke...