Dark Arcanos
From the White Wolf Wiki, the most complete White Wolf reference
A Dark Arcanos is a specialized Arcanos fueled by Angst and Oblivion. These abilities are primarily used by Spectres to serve Oblivion and torment both the wraiths and the Quick. It is possible for a regular wraith to learn and use these abilities, but it generally results in them becoming destroyed or joining the ranks of the Spectres much faster. Of the few wraiths who attempt to use the Dark Arcanos, the most common are Doomslayers and Helldivers; these two groups spend much of their time in the Tempest and Labyrinth, and find the abilities useful for disguise and turning the tools and weapons of Spectres against them.
There are seven known Dark Arcanoi:
