They pinpoint what you most deeply desire, then withhold it or give it to someone else

Those higher on the spectrum of narcissism and closer to psychopathy find great delight in manipulating others and causing them pain. The most covert and sadistic of narcissists enjoy finding out what you want and pretending they can give it to you. Then, when you least suspect it, they’ll withhold whatever they promised and give it to someone else (and you get a front-row seat to the horror show).

https://thoughtcatalog.com/shahida-arabi/2018/05/5-seriously-fucked-up-ways-covert-narcissists-and-sociopaths-destroy-you