The Fegurth believe in a special orientation of the Death-led Triumvirate cult. They find the divinity in the death, too, but other than the other Death-led and generally most of the black magical creatures in the multiverse they don't represent physical corruption, but incredible beauty. Furthermore, the Fegurth don't adore death only, but also life. So most of the Fegurth possess the ability to die and regenerate when they wish and as often as they wish.
These huge differences between them and the usual necromancers are one of the reasons why the other death-leds and the major black church run an inquisitions against the Fegurth.