Ding Dong, the Witch is Dead. Now What?

A relationship with a narcissist is all about death. Their death (they killed themselves a long time ago), your death (the narcissist must "kill you" to separate and individuate), the "dead mother (that caused all this in the first place), the death of your identity and agency, and the death of everything around them. So when they are gone, why is there still a problem? And what can we do to get past it!