ω ϖ—Poisons nearby enemies. Until the poison is entirely removed from the bloodstream by a knowledgeable medical professional, it will periodically immobilize a poisoned individual and any nearby allies.
It is not feasible to complete this quest on a full clear of the instance. The debuff is too cumbersome to leave uncured. Players who wish to complete the quest should form a group that agrees in advance to leave the instance immediately after encountering Mother Smolderweb.
An alternative to this is set temporarily your hearth to a spot with an FP near Blackrock, then notify your group that you wish to turn in the quest. Once you get the debuff, hearth out, run over and hand in, then head back to the instance. This is more time-consuming, but avoids having to only run a half instance.