Black Ichor

Black Ichor is a mythical substance which runs through the veins of all Diabulus.

Healing properties
Unlike golden Ichor, black Ichor can mend any wound of the flesh, including a full-body regeneration, but it has no power to mend the soul, cure poisons, or cure diseases. In addition, it would seem that the substance has to be entered into the bloodstream to take effect; whereas golden Ichor can simply be swallowed, or even touched.

Black Ichor is also significantly less "choosy" about who it is used upon; it has no noticeable ill effects on any who consume it. It is rumoured, biblically, that using black Ichor causes irreversible damage to the soul, and eventually consumes it entirely, but this has never been observed properly.

The healing process is often depicted as "sinewy strands of coagulated Ichor stretching out of capillaries and veins and forming a seemingly endless number of 'bridges' to all but instantaneously and completely cover a wound. This mesh of blood then scabs over equally quickly. This scab flakes off almost immediately, and can be saved for later use, or allowed to fade into dust."

Scabs
The scabs formed from this healing process can actually be used in their own way, as well. They can be eaten. Consumed "Black Flakes" cause a variety of effects in a person; from the psychadelic to the therapeutic, although most people report an immediate numbing of any pain they might have been experiencing, and a slight red-tint to their eyesight for a few hours. In extreme cases, people have been reported viewing nightmarish visions, which seem to have been consistent for each case. All reported the events as a "carnival funhouse from hell". Black Flakes are illegal in many areas, and have habit-forming qualities.

farming
Black Ichor can actually be farmed; all breeds of Diabulus naturally produce black Ichor as part of their circulatory system. It can be assumed that the healing substance can be distilled from enough of the lower-grade common substance, because of the apparent availability of black Ichor and the the unavailability of "pedigree" Diabulus.

relation to Diabulus
While all Diabulus possess black Ichor, it is only a very select "pedigree" that gain the healing benefits of it. These Diabulus are, with a few exceptions, all descendants of Scath.