These include recorded witness accounts of the writer finding, learning, and practicing the formulaes, rituals, and ceremonies that are often found along with the portion of complete works. They are most often a duplicate or the original of recorded experimentation done in the hand of the writer it is ascribed to.
No one knows how these replicate (it is a suspicious feature), though they are thought to be inspired writing by the actual Practicioners and enactors of powers found in the collected works.
Diabolic Inks: The works of Rastillions Diabolique try dark and thematic elements bordering on madness and the grotesque; All provide occult or divine insights to those who are willing to push the limits of the unknown and their understanding of what is reality. Many of the works, at least the partial ones, are inscribed with Skelosian Ink or something akin to it. These accounts are mostly copies and written in this ink or something that has the same effect.