Kingsport - Forgotten Realms
A Drow Wight with deadly questions.
Xaphael was the Drow Wight in the abandoned barracks in the Fang. He craved knowledge of the outside world and when awoken asked the party to tell him of important or auspicious events since he was last aware.
Failing to tell him something he deemed important resulted in the unlucky party member spontaneously throwing up (and taking necrotic damage).
The party just about managed to tell him enough of relevance that he was placated and returned to sleep.
He had sword that looked kinda neat and the party contemplated stealing or taking it but enough people had thrown up through their noses that they just wanted to be done with the place.