Caste Necrosis

The Caste Necrosis exists as a hidden chancre within the
Hippocrasian Sect, their experimentation having taken them
far into areas the Lathe-Covenant has ruled heretical. Those
who know of the heretical cult believe it is either the direct
work of Magos Vathek, or at the least, inspired through his
dark experimentations into the re-animation of dead tissues.
Some even believe that the arch-mutant Archimedes Noxt
created the Caste, secretly funding and guiding their efforts
in order for him to better control his own unstable flesh.
The clique of Tech-Priests who began the Caste know that
their work would sentence them to Servitude or worse, but are
confident that their experiments and the knowledge they gain
are worth any penalty. They mask their work using secured
mortuaria halls stricken from the station’s records, or even on
other nearby orbitals. In these lairs, flesh is grown, treated,
destroyed, and rebuilt, all to better fathom its limits, and then
venture beyond them. They originally built scores of flesh
gholams merely as a ready supply of living beings which could
be studied as they perished under controlled conditions, but
soon the gholams themselves became their main line of study.
Developing new flesh for their constructs led to experiments
in flesh modification using forbidden extracts and heretical
techniques, creating new gholams for further new experimental
avenues. As their creations grew more resilient, the Tech-Priests
began implanting flesh harvested from particularly successful
gholams into their own forms, even replacing their own
cybernetic upgrades with these horrid tissues. Some within the
Caste have taken their intense study of decay into the darkest
of areas, and surely have attracted the attention of the Ruinous Powers, in particular Father Nurgle.