Board Thread:Warhammer 40k General Discussion/@comment-25618639-20150112024430/@comment-26859246-20150903144542

Yea the cult that was good at fortelling the future a power that the librarians of the Ravens are also adept at. Plus the insignia used by the cult was a ravens head as well.

Although there were very few loyalist marines within the Thousand Sons its not impossible and i don't think that the whole legion would follow their primarch to chaos without having their own opinions.

But this is so far just speculation and there were hundreds of chapters that know nothing of their founding or the legion that they are descended from