Many lords of the Adeptus Astartes visit the quiet, dusty halls of the Librarius to draw their inspiration and resolve from that ancient book in times of darkness. The Chief Librarian is the master of the Librarius and the keeper of his Chapter's lore, as well as a member of the guiding council of the Chapter's senior officers with encyclopedic knowledge of his Chapter, its enemies, and the Imperium. Subvert Machine - The psyker imposes his will upon an enemy Machine Spirit, forcing it into a state of dormancy or confusion, or even causing it to fire upon its own allies. Warhammer Community: The Librarian Consul Boils Space Marines With Warp Lightning, Even if the Emperor Says Not To (posted 13/4/2023) (last accessed 13/4/2023)

Short-Range Telepathy - A Librarian can send his thoughts into the minds of those around him for a short distance, making a generalised broadcast to every mind within a short range indiscriminately. A Vanguard Librarian is a Primaris Librarian chosen for Vanguard Space Marine service. Vanguard Librarians have mastered unique battle-disciplines that focus on obscuring the passage of their comrades and wrong-footing the opponent with illusions and hallucinations. Lightning Arc - Bolts of Warp lightning leap forth from the psyker's eyes and mouth, arcing violently among the enemy forces and leaving death in their wake. Warhammer Community: Shadowspear Focus: Vanguard Units (posted 5/3/2019) (Last accessed 4 September 2019) Chief Librarians also spend a great deal of time training their lesser codicier and lexicanium battle-brothers in the dangerous ways of the Warp.

Doing the Conversion

Veil of Time - The Librarian attempts to predict the near future, seeing the flow of events and the actions of others. While this power is in effect, the Librarian benefits from this foreknowledge. If a recruit survives the rigorous testing, he joins the Librarius as a lexicanium, rising through the ranks to become codicier, epistolary or perhaps even the Chapter's Chief Librarian. He will use his abilities to pierce the Warp and provide the means for astrotelepathic interstellar communication, as well as to identify others of his own kind. He will judge them as he was himself once judged, scrutinising potential candidates and peers for frailty of mind or spirit. A moment's weakness can unleash untold evils, and vigil must be kept against any wavering of purpose. Psychic Scourge - The psyker pits his superhuman willpower against that of an enemy sorcerer in a battle of mental fortitude, seeking to scour arcane knowledge from the foul witch's mind so that he or she cannot use it in battle. This ability can also be unleashed upon non-psykers, in which case the psyker simply seeks to destroy their minds in a blast of psychic fury. A Space Marine Librarian wearing a Psychic Hood to enhance his psychic strength and protect him from the psychic abilities of the foe.

Librarians are the battle-psykers of the Space Marines.* Those that earn the right can don the sacred Terminator armour of the first company for battle, allowing them to lend a lethal psychic edge to elite infantry spearheads, whether that is in gruelling boarding actions, ferocious urban fighting, or on the front line against overwhelming enemy numbers. Avenger - The Librarian summons up the ancestors of his Chapter and shapes them into a flaming, vengeful avatar of death. The construct then billows forward to incinerate those in its path. Elikas - Elikas was a Chief Librarian of the Dark Angels Legion during the Great Crusade. He voted in favor of keeping the Legion Librarius in existence during the Council of Nikaea. Chief Librarian Tigurius - Tigurius is the Chief Librarian of the Ultramarines, a masterful telepath rumoured to be the most powerful of all known Adeptus Astartes psykers. It is said that he touched minds with the Tyranid Hive Mind and survived - a feat previously considered impossible, as the psychic weight of the Hive Mind would overload the telepath and subsume his soul. His equipment enhances the power of his psychic abilities, doubling their maximum range.

Smite

Given the nature of some of the places into which the Deathwatch must go, such an ability is invaluable, and has saved the lives of many of Mankind's mightiest warriors. While many Deathwatch Librarians are, in effect, part of the watch commander's officer cadre and not permanently assigned to a single kill-team, in reality most come to associate themselves with one group of warriors. Such is the bond between the battle-brothers of a Kill-team that to separate them is to degrade their considerable combat effectiveness. Deathwatch Librarians are able to make a significant contribution to a Kill-team, lending their singular abilities to the eternal war against the alien horrors of the galaxy. The training within a Chapter to become a Librarian is very difficult, as new Librarians must not only be strong enough to survive the rigours of their training, but possess enough mental discipline to fend off the Daemons and entities of the Warp, as these creatures see the enhanced form and mind of a Librarian as a great prize through which they could work much evil in the physical universe. Aggressor Squad • Desolation Squad • Devastator Squad • Hellblaster Squad • Eradicator Squad • Eliminator Squad • Infernus Squad • Centurion Devastator Squad The ancient lore of a Chapter's Librarius is vast indeed, and hidden among its complement of ancient tomes and scrolls are the hard-won secrets of the Space Marine Librarians. Within a sacred few of these closely-guarded texts are techniques that allow the user to enhance his own psychic might or quell that of his foes. In battle, those trained in the Librarius discipline can batter enemies with ethereal force, strengthen their own minds and bodies with the power of the Warp, or sever the connection of other psykers. Soul Sight - The psyker shares his Warp-sight with his brethren, causing their eyes to glow with an ethereal light. So empowered, no foe can escape their omniscient gaze; the souls of their targets flare like flaming beacons in the dark.