Fan Casting Codex in Earth-27 fancast (rewrite)

Originally a body backup of Brainiac called "Brainiac 5" was a Coluan body outfitted with cybernetics, but shelved and never activated due to having a difficulty to suppress identity... until 2017 when the US Government revealed they had obtained him and renamed him 'Codex' and fitted him into the roster of the Advena Legion.