Board Thread:Questions and Answers/@comment-34325755-20180122230355/@comment-34367562-20180207055754

I agree with you on them being a favourite! However, IDK if the Custodians would be acceptable... as you said they recently came out with a new Codex-Section on them. But as I have just finished reading Wikia and other forum post pages about the Custodians, I think they have 5 main groupings that they are divided into. And since only the Emperor (not even the High Lords) can alter any aspect of their existence, I doubt much more in the way of creation or adaptation (outside of military field doctrines) would come to pass!

But maybe the community has more info that I'm, as yet, unaware of.