Editing Gene-seed (section)

==== Emperor's Children (III Legion) ====
{{Main|Emperor's Children}}
* Implicitly defective and/or enhanced Lyman's Ear, and possibly Occulobe and Neuroglottis.
** An accident (non Chaos or other enemy action related) during the early days of the raising the Legions resulted in only two hundred Space Marines of the III Legion by the time the Emperor found [[Fulgrim]] and Chemos, forcing the Emperor's Children to work alongside the [[Black Legion|Luna Wolves]] for the early decades of the [[Great Crusade]]; due to Fulgrim's high standards of perfection being passed on the Legion's [[Apothecary|apothecaries]], Emperor's Children Aspirants had to be nothing less than physically perfect, resulting a largely stable gene-seed, including forbidding psykers to join the ranks. By the 41st millennium, however, the Emperor's Children's gene-seed is fucked up beyond all reason. Millennia of drugs from both inside and outside the Warp have damaged it greatly. While the relatively few sane [[tech-priests]] left and [[Dark Mechanicus]] working with them can and do make new Marines (thus proving their Marines can and do make new gene-seed), the chemical and other material abuse render each generation even crazier. Even before the Heresy, they were more sensitive to external stimuli, like sound, implying a defective Lyman's Ear with reduced ability to filter out sounds the Marine doesn't want to hear, and potentially similarly defective Occulobe and Neuroglottis.
*Initial batches of gene-seed were defective, carrying an infectious a super-cancer/progeria creatively called "The Blight" it also caused the entire legion's gene-seed stock on Terra to rot into useless sludge. Thankfully after Fulgrim's return the rotten batches were discontinued and replaced with fresh clean gene-seed preventing it from becoming a permanent feature of the legion. The Blight may be more of a [[Nurgle|spiritual]] infection because even after dying and having his soul swapped into new bodies Fabius Bile still suffers from all the symptoms.