Sealed Vial of Poison

Dalaran Quests

Sealed Vial of Poison https://wowpedia.fandom.com/wiki/Sealed_Vial_of_Poison

Upon completion of the quest Jewel Of The Sewers, this quest was included in the reward

and all I had to do, was to delivere the vial to Alchemist Cinesra https://wowpedia.fandom.com/wiki/Alchemist_Cinesra

located in the Underbelly, at the Black Market (Dalaran) https://wowpedia.fandom.com/wiki/Black_Market_(Dalaran)