Board Thread:Warhammer 40k General Discussion/@comment-4264245-20130314155327/@comment-67.49.19.28-20130404055239

Yes. The original piece of fluff is very very old as in, pre-3rd edition, I don't remember if it was from 2nd or Rogue Trader but it was certainly before the IA article. The thing about Angron killing the Librarians as he became a Daemon Prince is from the ADB novel Betrayer that just came out a few months ago.