Prototype Neural Needler

Source
The Prototype Neural Needler is a torturing device developed by the Kirin Tor and sold by Initiate Mehrtens for free. It is used to persuade the Imprisoned Beryl Sorcerer within the tower on Amber Ledge to talk about the plans of the Blue dragonflight for the quest The Art of Persuasion, should the Neural Needler have been destroyed.