You can curse the shit out of a narcissist but it isn’t going to change their nature. They won’t stop being a narcissist because something bad happens to them. They also won’t be scared off a victim of their bullshit by it in particular if they don’t know that the threat comes from them. You can hope they lose interest which generally happens when they find someone or something else to distract them or you can stop reacting to their bullshit which is super hard I know but they literally thrive on attention. Positive and negative so if you give them neither eventually they lose interest. Also give them as little access to you and your life as possible. Third option I generally don’t condone unless absolutely necessary. Fuck trying to curse them and punch them square in the jaw.