An Abyssal Staff is a Necron weapon used only by Cryptek Psychomancers. Indeed, it can be considered their signature weapon and symbol of office. Taking on the appearance of a simple staff, its ornate head is as dark as onyx and decorated with arcane symbols designed to prey on the subconscious fears of mortals.
An Abyssal Staff is capable of summoning gouts of shadow that are emitted in a similar way to how flames may be emitted from an Imperial Flamer. However, to succumb to the swirling ebon mists and shroud of despair called by an Abyssal Staff is to be swallowed in impenetrable madness, for it is designed to strike at the sanity of the foe and sap their willpower to live, thus causing enemies to be turned into gibbering wrecks of their former selves if they are not slain outright by the experience.
- Codex: Necrons (5th Edition), pg. 84
- Deathwatch: The Outer Reach (RPG), pg. 122