Editing Geist: The Sin-Eaters (section)

=== Necromancers ===
Krewes and Sin Eaters can perform ceremonies to both interact with and help the dead, but so can a great many of normal people as it's mostly just words, gestures, scripture and the occasional salt circle. In spite of much of that shit being secret, Many of the normies that accidentally do these rituals are encouraged for their work by Sin Eaters, who correctly recognize their work as exceptionally helpful.

Necromancers on the other hand, know these rituals to openly fuck things up and they don't care how they go about doing things to the dead. They steal power from the Underworld; Plasm, whole ghosts, even Reapers in some circumstances, and they will use them however they see fit. They use the Rituals of the Sin-Eater for evil means, they steal Mementos and begin to collect them obsessively in order to harness the power of the dead, and of course...summon even more terrifying undead. Some might genuinely have no clue what they're doing is actually anything bad, but those who do are bad news and need to be stopped quickly, because the powers of the dead are not to be fucked around with.

Oh and they form cults of like-minded maniacs wielding the dead like clubs against life. Have fun with that!