It is not uncommon for groups of Librarians to be dispatched with an army of Servitors and a number of Space Marine squads to uncover a lost artefact whose location has been recently unearthed or revealed through ritual divination. Many of these Masters are psykers who specialise in studying the ways of Chaos, so that the Blood Ravens may better fight against the heretics, and who are believed to sometimes form up battle-squads of the Chapter's Librarians to lead into battle. Those Librarians able to make some sense of the distortion reported terrible visions and nightmares, some even of the Great Unclean One Ulkair stirring in his prison in the core of old Aurelia. When Thule attacked the Tau Empire's Stronghold, and killed the Ethereal there, Shas'O Kais managed to take the Ethereal's body so he could have a proper funeral. The rest of the Chapter serves aboard the fleet of Strike Cruisers and other Battle Barges that were assigned to the Blood Ravens long ago when the Chapter was founded. The Blood Ravens overcome this difficulty by recruiting from a number of worlds, with which they have long-established relations, most of which are in the Sub-sector Aurelia of the Korianis Sector. After a few engagments between the Force Commander and the Black Legion on Typhon, Meridian, and Calderis it is revealed that someone within the Chapter has given communication access codes to Eliphas; there is a traitor among the Blood Ravens. The strikes were perfect, sweeping aside those before them, leading to the quick and bloody close of the campaign. The only similarity between the worlds is the higher volume of psykers they are home to, leading to an increased number of Librarians in the Chapter. During such missions, these independent Librariums serve as interim storage of knowledge and a valuable resource for reviewing the less-volatile lore that the Chapter maintains. All over Sub-sector Aurelia, outbreaks of mutation and other psychic phenomena were endemic. Are they worth your time if you aren’t already sitting on a pile of Marines in dark red armor with bone-colored shoulders? Scant weeks after initiating his plans, madness erupted in the sky as the Great Rift emerged and the Astronomican went out.
Its leadership is now well aware that the Blood Ravens can ill afford to lose any further members to treason or heresy. Although many men and women took part in the many actions of the action, the main focus of the Crusade revolved around a small group of Blood Ravens: The next campaign (in Chaos Rising) revolves around the mysterious Planet of Aurelia. Gabriel Angelos, ever a warrior of honour, nobility, and an uncompromising stubbornness in the face of the enemy, ordered his Blood Ravens to respond to as many worlds as possible within the region. Due to the loss of the Astronomican's beacon, carrying out such commands was much easier said than done. It may be that the decision was made for reasons lost to their history, which has been preserved for traditional reasons rather than functional ones. But this is an unfair assessment, for once the Blood Ravens take to the field, they fight with righteous fury and a zeal the equal of any other Chapter of the Adeptus Astartes. Azariah was an exceptional Psyker who was serving as Master of the Librarium during a campaign which saw both the Chapter Master and the Master of Sanctity dead, with the Chapter suffering heavy casualties. Blood Ravens Librarians can be found in the Deathwatch and the Chapter appears to also maintain unusually close relations with the Grey Knights of the Ordo Malleus. There are a number of worlds in particular that the Blood Ravens favour over others. Eventually, Vidya completed his divinations and studies, declaring that he possessed the knowledge to defeat the enemy utterly.