Changes

The Blood Ravens do not know of their founding because all records were lost early on in their history the call their unknown founder the 'Unknown Primarch'. It has been spreculated that the founding chapter is [[Thousand Sons]] which explains why Blood Raven guard their dark secrets with extreme zeal, and have presumedly even destroyed information of their funding and past. [[Thousand Sons]] founding chapter would also explain great use of Librarians and psychic powers.