Malignant narcissism is a psychological disorder that's an extreme mix of narcissism, antisocial behavior, aggressiveness, and sadism.
It has all of the characteristics of narcissism - but it takes them to the extreme.
I suffered at the hands of a malignant narcissist for seven years.
I was emotionally tortured by his nasty, venomous words, his hateful behavior towards me and his sadistic enjoyment of anything that upset me.
For years I was under his con.