Does a narcissist ever get their comeuppance/karma for the vile things they've done? Such as cheating, smear campaign, etc.

I strongly recommend reading these articles on Quora:

10 Toxic Relationship Behaviours to Watch Out For

Being away from him has at least given me room to observe and call him out though this does no good as he is a pathological liar. He can't keep a girlfriend or any friend for that matter. Meanwhile, I am still trying to heal while in this war. It seems every time I think it's settling he throws more dirt and dust at me to keep me clouded. I think I am getting better. The divorce is final. I've moved on into a new relationship, but I could tell some stories, my lovies. To all who can relate to my pain and the pain of others described on this thread, you're not alone in this. Even when it feels like it. People will eventually see the narc for what they are and you will be redeemed.

Virtual model of a Venusian pancake dome shows it likely formed due to elastic lithosphere and dense lava - Phys.org

Uncover 7 Key Differences Between Narcissists and Sociopaths

7 Demonic Doors Opened in YOUR Life Through Narcissists

10 Toxic Behaviors of Female Covert Narcissists

Why do atheists not love a G-d that does not stop punishing them harder and harder in this world and the next until they surrender to Him?

Boy, could I write a book on the ways and how much I wish they did. Reading through these stories, I find myself amongst my brethren. It seems we all have a person in our lives who just fixated on us. Perhaps we should be flattered that our supply was just “so, damn, good”. But I don't feel like that at all. My ex narc is using our 6-year-old to torment me now, and he is so manipulative that he has our son lie to me so I can't protect him when he hurts him.

7 Ways Narcissists Discard You

7 Reasons Why Narcissists Won't Change

Will my 9 year old face more difficulties than most girls her age if she’s an early bloomer? My daughter already needs regular B cup bras. The doctor says that my daughter will be even more developed by 11-12 years of age.

Every time I have to drop him off I worry about my son's safety both physical as well as mental. My ex narc will spin a story around so fast it'll make your head spin. I used to have to write our conversations down so he couldn't twist my words and even then he did it. By the time he left I was a jumbled up mess who didn't know which way was up.

10 Actions That Terrify Narcissists to Their Core

Avoid Making These Big Mistakes With A Narcissist

Rocket Report: SpaceX’s 500th Falcon launch; why did UK’s Reaction Engines fail? - Ars Technica

10 Reasons Codependents Fall For Narcissists