Editing History of the Green Men (section)

===Start of the nightmare===
Although the Life Bringers never discovered this, it was Velzevul Quint who secretly brought the worrying extent of the experiments undertaken by the Genetors to the Emperor's attention. Although it may seem paradoxical that the man who was in no small part responsible for leading the geneticists of the Twelfth Legion astray would personally present evidence against them to the Emperor, this was a very shrewd and calculated move. Firstly, it further cemented the reputation of the Justicars as the Emperor's ever vigilant secret police, and secondly, and, perhaps, more importantly, it forced Vrach to defy his father's will directly. When the ruler of Mankind ordered his son to wrap up all the dubious genetic research, Johannes was finally convinced that his fears about his father's fatal short-sightedness were completely justified and that open disobedience was the only choice he was left with if he wanted to conquer disease. Although officially the questionable laboratories were closed down, in reality Vrach gave his High Genetor a carte blanche to find the ultimate cure, and Sachs had every intention to use it. Quint kindly agreed to share his expertise in covert operations, teaching the Life Bringers how to hide their forbidden research from the Emperor's prying eyes. Soon thereafter, he and his retinue finally departed from Valetudinarium to reunite with the rest of their Legion, carrying very good news for their Primarch.

Meanwhile, Wilmut Sachs plunged deeper and deeper into bioheresy in his desperate quest to find the panacea his Primarch would be satisfied with. Disillusioned with traditional methods of medicine, he made the hard decision to shed the shackles of medial ethics entirely. Soon, he and his closest adherents experimented eagerly on the kidnapped battle brothers of their own Legion, picking out those who openly stated that the Life Bringers' transformation from a military force to a glorified interstellar hospital was a disgrace to their origins. Valetudinarium became a dangerous place to speak up against the Primarch. And yet, success eluded the Genetors time and again. Constant failure made the once open-minded and curious Sachs into a bitter, callous man who would do anything necessary to bring his research to a successful conclusion. He didn't know yet what exactly was necessary, but he was most determined to find out.

Soon after the Culling of Genetory, the Life Bringers were struck by another major blow from the Emperor, this time in the form of the Council of Nikaea. The Legion's Librarians were infuriated by its outcome, none more so than Vertumnus Alraun. They certainly had a good reason for discontentment: never once have the exemplary Librarians of the Twelfth Legion overstepped the narrow limits set by the Emperor, even when the opportunity called for it. And as a reward for their impressive self-restraint they got stripped of all their powers and forced to feel ashamed of the way they were born. As he was surrendering his regalia to the Legion's Armoury, Alraun cursed both the Black Augurs and the [[Void Angels|Winged Victory]] and wished for them to perish to a man to the perils of the Warp. Since his traumatic youth on Clapet, the Chief Librarian had always considered psychic powers a great boon to Mankind that could right many wrongs that ordinary tools were powerless against, and the Emperor's harsh ruling established him as a near-sighted control freak in the eyes of Vertumnus. As he was going back to his quarters, he was suddenly stopped by High Genetor. With sparks of nascent madness dancing in his eyes, he told the former Librarian that perhaps his powers could serve Humanity at least one more time. Intrigued by Sachs' enigmatic proposal, Alraun followed him to his new secret laboratory.

Wilmut Sachs, it turned out, had carefully studied the logs of the [[Council of Nikaea]]. What really drew his attention was the evidence presented by [[Darius Cyaxares]] against the [[Black Augurs]]. It included detailed descriptions of the dark rituals the sorcerers of the Fourteenth Legion purportedly used to establish contact with powerful sentient entities inhabiting the Immaterium. One name that kept coming up was that of some Master of Disease, a godlike entity with seemingly absolute control over all sorts of plague and pestilence. Sachs was determined to contact this entity and strike a deal with it that could help him find a universal cure that his Primarch so desired. For a price, of course, but High Genetor was long past the point of caring about the price.

And so, using the notes from the protocols of the Council of Nikaea, Alraun and Sachs managed to step by step recreate the forbidden rituals of the Black Augurs and summon forth an evil spirit of the Warp, paying for this privilege in blood of several battle brothers too critical of their Primarch's new course. A bloated, repugnant creature truly worthy of the title of Plaguefather looked back at them from their amateurishly drawn pentagram. The creature introduced itself as Ku'Gath, a beloved grandchild of the Master of Disease himself. Although it was apparently delighted to be summoned by the Life Bringers, as it had a fondness for making new friends, it stated that they were unworthy to speak to his divine grandfather. That honour belonged to their Primarch, and to him alone. With these words, the entity departed the occult chamber, leaving only a repugnant smell in the air and a pool of diseased slime on the floor as sole reminders of its visitation. Although both Space Marines were most impressed by the profane spectacle they had witnessed, their opinions on it varied drastically. Wilmut Sachs was elated by long-overdue progress; finally, after years of wallowing in failures, a glimmer of hope for success shone in his eyes. Vertumnus Alraun, on the contrary, was shocked and appalled by the creature he personally had summoned. He now understood perfectly what the Black Augurs had been punished for, and he was honestly surprised that the prodigal Legion was allowed continue to exist after the revelation of its dark dealings with profane entities.