"The most severe cases are those of 'malignant narcissism'-severe deterioration of the Super-ego, anti-social behavior, paranoid features, etc. and the 'psychopathic personality' with a total destruction of the super-ego. "
A Study in Evil: Voldemort, the Malignant Narcissist by Maria Hsia Chang
"The term “malignant narcissism” probably was first coined by psychiatrist Erich Fromm in his 1964 book, The Heart of Man. In it, Fromm identified the malignant narcissist as an individual for whom the outside world “has ceased to be real” because he has made himself the substitute for reality by making himself his own “god and the world.” The malignant narcissist is “crudely solipsistic” because he is great not for something he has achieved, but for some presumed quality he has. Consequently, he does “not need to be related to anybody or anything.” Doing so, however, removes him even more from reality: the individual becomes more and more isolated in a fantasy realm of grandiosity and “narcissistic splendor.”"
Malignant Self-Love by Sam Vaknin
"The narcissist is an actor in a monodrama, yet he is forced to remain behind the scenes. The scenes take centre stage, instead. The Narcissist does not cater at all to his own needs. Contrary to his reputation, the Narcissist does not "love" himself in any true sense of this loaded word. The narcissist feeds off other people who hurl back at him an image that he projects to them. This is their sole function in his world : to reflect his False Self, to admire him, to applaud his actions, even to detest and fear him - in a word, to assure him that he exists by giving him constant attention. Otherwise, the narcissist feels that they have no right to tax his time, energy, or emotions.
In the essay, I survey the main body of research about Narcissism. The Frequently Asked Questions deal with various aspects of narcissistic (often abusive) behavior, traits, personality, and style - and there is much more in the journal entries and in the hundreds of excerpts from the Narcissistic Abuse Study List."
Traits of Malignant Narcissism by Tami Port
"Most of us have narcissistic traits, and a certain degree of self-interest is healthy. But at what point does self-absorption become pathological narcissism?"