Board Thread:Warhammer 40k General Discussion/@comment-58.178.141.62-20140405080514/@comment-3416287-20140407180947

There are several things that imply the Blood Ravens are made up of Thousand Sons.

Both have an above average amount of Librarians.

You had the cult of the Thousand Sons whose symbol was a raven.

There is the one Thousand Son who had blood red armour with a raven on it.

They both crave knowledge.

I don't remeber completely, but some Eldar thought a group of Blood Ravens were Thousand Sons whom they earlier tasked with guarding a relic or something.