Secrets of the Dead
It was in the wake of the Green Awakening that nearly two million Avernites died from the sheer psychic shock of the event. It was a grim day for no small number of Avernite communities, to suffer so sudden a blow. Survivors, talents, warriors all alike were reaped. The day was a day of mourning, but their bodies were not burned. At least, not immediately.
Two million Avernites, who in likelihood was a nascent psyker.
Waiting to either be found by and awakened by a Witch-Finder or by Chaos Gods. Claimed by Gork and Mork.
But it was not for naught.
A full sample of blood was drawn from each of the bodies, long prior to their final destruction.
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They were taken into the Archmagus Biologis Vinceo Maximal's care.
You see, a mere decade and a half ago, the Archmagus had finished a decade-long project in an attempt to sequence the psychic genes that would indicate whether one was a psyker or not - A project that ultimately met with only partial success. It had a 90% accuracy, but had a 1000:1 false positive ratio.
Immediately prior to the Green Awakening, this translated to nearly 400 million Avernites.
Obviously, there was room for improvement.
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The initial genes used for the first genetic tests relied on about 2 million psykers voluntarily providing genetic material, plus information garnered from Niflheim, Muspelheim and Svartalfheim. To this, now, the Genetors under Vinceo added another two, slowly and methodically sequencing chromosomes for each of the dead, adding the information to their databases.
The initial dataset was a small one, though it nevertheless sufficed for a test. In time, though, when a newer, more advanced test was to be designed, it would assuredly be of far greater superiority - Statistics relied on sheer quantity to guide it's awesome predictive power.
And death would not hide the secrets of psychic power.
(AN: It's also possible to improve predictive power by considering all the false positives uncovered so far. Checking through the ~400 Million False Positives to do it, though? ..Yeah.)