Just really curious if it possible for some modern Alpha Legionnaire to work for Imperium of Man openly without resistance. Maybe lone Chaos Space Marine who looks like Alpharius with bald head and creen eyes and without any kind of physical corruption for example the Faceless Marines from Mike Brooks books about Alpha Legion could give very important top secret information about Chaos forces or sabotage Traitors within only to be after that officially redeemed by some parts of imperial central governemennt of Terra by High Lords.
It must be very important information that can influence whole planetary systems and bring victory to Imperium of Man.