User blog comment:Supahbadmarine/Too Many Loyalists!/@comment-1932673-20110606150904/@comment-10514705-20110606163804

Okay, you have a fairly credible argument BUT...

First of all, as the current Canon on this site is 3rd to 5th edition and their are some contradictions, just because ONE source says that the traitor geneseed is held on Terra doesn't mean it is 100% correct when their seem. That is the problem with GW's fluff is that it does not remain consistent, hence why issues like this arise. Secondly, the Essceliarchy is rife with corruption and rogue elements would frequently look for anything to gain an advantage. So it is not unfathomable.

Thirdly, it is implied in Graham McNeill's Thousand Sons that the Blood Ravens are in fact the future of the Thousand Sons. This is Kallista Eris's prophecy from the novel.

'It's too late... the Wolf is at the door and it hungers for blood. Oh, Throne... no, the blood!. The Ravens, I see them too. The lost sons and a Raven of blood. They cry out for salvation and knowledge, but it is denied!. A brother betrayed, a brother murdered. The worst mistake for the noblest reason!. It cannot happen, but it must!'

And I'll credit my younger brother on informing me of this quote as he has read the book several times and knew exactly were to find it. Also, in DoW the Thousand Sons sorcerer refers to the Blood Ravens as his brothers in a sincere sense rather the usual generic 'brother space marines' way.