Dextrocite is what produces alkabellum. A special team of geologists, physicists, doctors and chemists were assembled to fully study the ore 'dextrocite' and the element it released. Once examined by the geologist is was found that the ore 'dextrocite' was similar to coal, but only in how it was made. Coal is made from once living organisms that have been preserved, compressed and heated to form the end result that is coal itself.
Dextrocite is formed in the same way but under different circumstances. The main difference between dextrocite and coal is that dextrocite is composed of much larger, much more complex organisms than coal is. Organisms like humans often make good agents to form dextrocite.
Tainted are humans, elphins and kitlings that have been struck by a sort of dextrocite poisoning. There are no known Ngafr who are afflicted by the taint, and it rarely affects animals. This is more due to Ngafr and animals not coming into contact with unrefined dextrocite rather than an immunity to the taint.