The quest for perfection consumed the Emperor's Children in body as well as spirit. For some it was not enough to achieve the accolade of perfection, they thirsted to embody that perfection. For these warriors it was not enough that the Emperor had crafted their flesh, and shaped each with insight and knowledge no other could rival; their granted state was simply the beginning of an unfinished path. Evidence would emerge during the Heresy that many years before Horus' treachery was made manifest, a few amongst the Emperor's Children, most notably their Chief Apothecary Fabius, believed that they could perhaps improve on what gene-seed, human breeding and the Emperor's design had made them. They tampered with implanted gene-seed organs, analysed and modified Progenoids, and undertook surgic