Editing Gene-seed (section)

==== Alpha Legion (XX Legion) ====
{{Main|Alpha Legion}}
<s>No such Legion exists, therefore no such gene-seed exists.</s>
*Were you really expecting ''known'' mutations, or anything else, from this Legion???

In all seriousness; like much of the Alpha Legion, we don't know all that much about their gene-seed. Whatever idiosyncrasies or flaws they have are kept under very tight lock and key. And with their nature of running as individual operatives in and out of the [[Eye of Terror]], to what degree their gene-seed is tainted by the Warp or other means varies from Marine to Marine. Though their knack for secrecy, paranoia, and tendency to subvert the enemy instead of direct combat is probably a notable trait. Outside of occasional Warp-corruption, we ''assume'' it's possibly one of the most stable gene-seeds, probably as much as the Imperial Fists or Night Lords. Something of note; they often use any mutations that they have as a scare tactic, hiding them and then revealing them on the battlefield in order to shock the opponent.
They also use hypnosis and deep-indoctrination more than other chapters, so they may have an altered sus-an and/or catelapsean.
Sometimes it's implied they all look alike (like Alpharius) but sometimes this is said to be due to ''surgical'' alterations, but it could be that the gene-seed does more to alter their appearance than normal, like the Sons of Horus and this is further supplemented by surgery. It's also said that some Alpha Legionnaires tended to be noticeably taller than most Space Marines, large enough to pose as either [[Alpharius]] or [[Omegon]]. This, combined with their unusually short Primarchs and their tendency to look alike, seems to suggest that this was intentional, either by the Legion themselves picking only notably large aspirants or by the Emperor fully leaning into the Legion's whole "smoke and mirrors" theme.