"You don't need to make it all so complicated! I've just gotta give up being a Shinigami and protect her for the rest of her life, right?! Of course I'll do it! If I let the girl who saved my life die because of some stupid regrets, I'd have to laugh in my own face!"

This article, Venator Scientiae, may be used by any user so long as they possess the permission of the article's original owner(s).

This article, Venator Scientiae, is property of Somnium Fluxus.

A Venator Scientiae (ビネィトスカィエヌチァィ, Bineito Sukaienuchiai; Latin for "Hunter of Knowledge"; referred to in plural as Venatores Scientiarum) is a mysterious spiritual being born from a completed Anima Casus soul. As beings with the sole purpose of owning the largest library of knowledge possible, they are unmistakably derived from the power of Velia Agostinha Vivax's Vetula aspect.


Normally, a Venator Scientiae results from an Anima Casus regaining sufficient memories of its living existence and becoming a completed soul once more. A Bibliotheca is formed by exchanging these familiar memories, and the Anima Casus gains a new spiritual body dependent on the body it possessed in its physical life. Even so, a Venator Scientiae can possess vastly different physical features and even an opposite sex to its former body. Because a fallen Sagus may produce more than one Anima Casus, it is possible for multiple Venatores Scientiarum to belong to the same soul while diverging entirely in physical appearance to one another. As with Sagi, any sentient being, including animals, can become a Venator Scientiae. Contrasting the Sagi, who may freely transition to and from the world of the living at a whim, Venatores Scientiarum are exclusively spiritual beings.

Venatores Scientiarum created by natural means usually have no recollection of their former existence. Although their personalities are mostly dependent on the Anima Casus they evolved from, Venatores Scientiarum often share a common goal—pursuing knowledge to the best of their abilities and storing it all in their Bibliotheca. They are highly solitary beings by nature, seeing even major events as little more than opportunities to acquire more knowledge; they are, as such, a mostly unaligned race very unlikely to be spotted under normal circumstances. There have indeed been cases of Venatores Scientiarum suppressing their desire of knowledge and fighting for a certain cause, such as Glacies Fidus, but such occurrences are very rare and often far from one another. Although Venatores Scientiarum are usually independent, there are few societies of Venatores Scientiarum who liberally exchange knowledge with one another in the pursuit of a common goal.

Only few Venatores Scientiarum are fully aware of why they pursue knowledge so obsessively. In truth, it is derived from an instinctive yearning to reacquire what they had lost upon birth—their mortal memories; but it is this desire that will ultimately lead to a Venator Scientiae's fall from grace. A Bibliotheca is considered completed when it has recorded a vast majority of knowledge pertaining to its wielder's former life; upon said completion, the Bibliotheca merges all pertinent knowledge into its wielder's soul before crumbling away shortly thereafter, turning the wielder into a regular physical being without any sort of supernatural power and thus completing the Nefas cycle of reincarnation. If a Venator Scientiae fails to store any new knowledge into their Bibliotheca over a certain period of time, they will lose all memories and knowledge acquired in their life before regressing into a regular physical being, a well-known fact that greatly contributes to all Venatores Scientiarum's desperate pursuit of new knowledge. Regardless of the state of their Bibliotheca, a Venator Scientiae will normally die after exactly five-hundred years have elapsed since their creation, leaving their Bibliotheca behind.

Becoming a Venator Scientiae

There is no known method of which two parents of any race can produce a Venator Scientiae offspring—the only way they can be naturally created is by completing an Anima Casus soul. It is possible to forcibly complete an Anima Casus soul by merging it with a more simplistic Anima Casus soul via Mater sorcery, but this produces unpredictable results. It is, on the other hand, possible for any being, spiritual or not, to become a Venator Scientiae by touching a manifested Bibliotheca belonging to one. A Venator Scientiae created in this manner is also referred to as a Bibliothecarius (ビブリォテカリゥス, Latin for "Librarian"). Exactly what occurs following this is dependent on several factors which also decide whether or not the newborn Venator Scientiae will retain their memories:

  • If any Bibliotheca is touched by a Venator Scientiae with a different Bibliotheca, the knowledge of the acquired Bibliotheca will simply be assimilated into their own Biibliotheca, destroying the acquired Bibliotheca itself. It is not possible for a Venator Scientiae to possess more than one Bibliotheca under normal circumstances.
  • If the Bibliotheca of a living Venator Scientiae who has not acquired all knowledge of their former life is touched by a physical being, both the Venator Scientiae and the physical being will die; the physical being is resurrected as a Venator Scientiae with a Bibliotheca containing all knowledge held by that of the plundered Venator Scientiae. In this case, for the newly-born Venator Scientiae to complete their Bibliotheca, they must acquire all knowledge pertinent to the life of its former owner rather than their own.
  • If the Bibliotheca of a living Venator Scientiae who has not acquired all knowledge of their former life is touched by a spiritual being, only the plundered Venator Scientiae will die while the spiritual being becomes a Venator Scientiae in their place, with a Bibliotheca containing all knowledge held by that of the plundered Venator Scientiae. In this case, for the newly-born Venator Scientiae to complete their Bibliotheca, they must acquire all knowledge pertinent to the life of its former owner rather than their own.
  • If the Bibliotheca of a living Venator Scientiae is touched by a spiritual or physical being just before the Venator Scientiae loses their power as a result of having completed it, the Venator Scientiae will survive and become a regular physical being while the one who had touched their Bibliotheca either immediately becomes a Venator Scientiae or dies and is then resurrected as a Venator Scientiae, depending on whether they were a spiritual or physical being respectively. In this case, the new owner of the Bibliotheca loses all memory and knowledge pertinent to their former life and must record it into the Bibliotheca before it is considered completed once more. Most Venatores Scientiarum elect to do this as a means of immortalizing their recorded knowledge and allowing their Bibliotheca to develop further.
  • If a Bibliotheca belonging to a dead Venator Scientiae is touched by either a spiritual or physical being, they will either immediately become a Venator Scientiae or die and then be resurrected as one, depending on whether they were a spiritual or physical being respectively. Depending on whether the Bibliotheca was completed or not, the new owner will either lose their memories and knowledge pertinent to their former life and need to regain it to complete the Bibliotheca, or retain their memories and require knowledge pertinent to the Bibliotheca's former wielder to complete it.
  •  If a Venator Scientiae presents a blank page of their manifested Bibliotheca to either a spiritual or physical being, the Venator Scientiae will survive while the being they had entrusted the page to will either immediately become a Venator Scientiae or die and then be resurrected as one, depending on whether they were a spiritual or physical being respectively. In this case, both parties effectively share the same Bibliotheca and agree to work together to expand it, completing it by recording knowledge pertinent to the former life of the initial wielder. The death of either one involved has no effect on the Bibliotheca, meaning their knowledge becomes entirely linked. For whatever becomes of the Bibliotheca in the end, both parties share the same fate. Generally, a Venator Scientiae will only agree to share their Bibliotheca with those who have earned their utmost trust; it is unknown if there is a limit to how many individuals may be linked to the same Bibliotheca. A Venator Scientiae touching a blank page of a Bibliotheca belonging to another Venator Scientiae will yield no effect.
  • Finally, if a Venator Scientiae's Bibliotheca is destroyed by a sort of spell, the Venator Scientiae will die while their assailant will inherit the ability the channel the power of a Bibliotheca using their spell as a sort of medium. In other words, the spell acquires the power of knowledge along with some deviation of all of the Bibliotheca's core abilities, although exactly how this may alter the spell is dependent on its original nature. This is the only method by which an individual may obtain something resembling a Bibliotheca without becoming a Venator Scientiae.

In any case, should a Nefas touch a Venator Scientiae's Bibliotheca, they will simply die and become an Anima Casus, meaning there is no method of which a Nefas-Venator Scientiae hybrid can be created. This is likely a result of both races belonging to different aspects of Agostinha's power.

Physical Traits

Upon birth, a Venator Scientiae's physical appearance is vaguely decided by that possessed in their former life; aside from this, Venatores Scientiarum have few distinguishing traits other than a peculiar physical defect present on some part of their body. These defects can range from minor, such as a discolored eye, to far more distinguishing, such as a mutated arm. It is by drawing power from their physical defect that a Venator Scientiae summons the power of their Bibliotheca

Powers and Abilities

Innate Abilities

Superior Intelligence: As derivations of Agostinha's Vetula aspect and wielders of the Bibliotheca, Venatores Scientiarum possess intellect well exceeding that of other spiritual races on average.

Soul Element: As with Nefas, Venatores Scientiarum possess the ability to mutate a part of their soul into a certain element to use as a weapon against their opponents. Elements conjured through this method cannot be turned against the user in any way. Unlike a Nefas, a Venator Scientiae may only possess a maximum of two soul elements and can still be harmed by spiritual attacks comprised of the same element. Because Venatores Scientiarum lack Pactum Anima and possess a spiritual body, the act of manipulating their soul element in this manner is very harmful and potentially fatal if overused. While Venator Scientiae elemental sorcery can potentially surpass that of any other race in terms of power, Venatores Scientiarum cannot generate nearly as much of their related element compared to a Nefas as they do not possess Pactum Anima. Ultimately, Venatores Scientiarum rarely use their soul element due to its impracticalities.

Fides (フィヂス, Latin for "Faith"): A passive ability related to a Venator Scientiae's ownership of a Bibliothica, Fides protects the Venator Scientiae's memory and knowledge stored into their Bibliotheca, allowing it to transcend even time itself. The Bibliothica can be seen as a sacred land isolated from reality and inaccessible to anything other than its owner unless they themselves allow others to pass through it. No power other than Vox Calamitosus is capable of tampering with an unmanifested Bibliotheca unless the owner allows it, meaning that a Venator Scientiae's memory cannot be altered in any way even through the use of temporal magic, much like the memory of Agostinha Herself. Even if time were to be reversed to a point before a Venator Scientiae's creation, they would simply reacquire their recollection of future events upon becoming a Venator Scientiae again and reclaiming their Bibliothica. Because only true knowledge can be recorded into a Bibliotheca, Venatores Scientiarum effectively cannot be deceived through disinformation.


The primary and most lethal weapon possessed by any Venatores Scientiarum, a Bibliotheca serves as both a Venator Scientiae's library of knowledge and a medium with which to utilize their most devastating abilities—it is a weapon which converts knowledge into power to apply in varying methods. A Venator Scientiae's soul is eternally bound to their Bibliotheca and thus cannot survive without it. In the case a Venetor Scientiae is killed by simply taking their manifested Bibliotheca from them, it is still possible to revive them by returning their Bibliotheca within a certain amount of time. Should a Venator Scientiae perish by any means other than having their Bibliotheca destroyed or stolen, their soul will cease to exist with the fate of their Bibliotheca depending on whether or not it was manifested upon their death—should a Venator Scientiae die with a manifested Bibliotheca, the Bibliotheca will remain regardless of whether it was completed or not. In a Venator Scientiae's subconsciousness, a Bibliotheca is depicted as a world of its own unique to them, with any recorded knowledge most often written in documents scattered around said world. A Venator Scientiae may elect to teleport others into this world and share knowledge stored into the Bibliotheca with them. Because a Bibliotheca rejects the influence or presence of anyone not sealed within it by the user's will, this can effectively be used to undo all forms of possession and identical ailments by simply transporting afflicted individuals into the Bibliotheca; however, this cannot undo possession achieved with any Mater soul fusion method because the user literally becomes a part of the victim. It is not possible for a Venator Scientiae to use their Bibliotheca in any form whilst they are within any Bibliotheca, including their own. An exception to this is Bibliotheca Ω, an alternative state discovered only by Alcyonē. Any individual removed from the Bibliotheca is transported to the location they were first sealed rather than the user's location. A manifested Bibliotheca usually takes the form of a peculiar book.

Bibliotheca abilities are organized into “chapters” (capita). The number of chapters that can be used is dependent on the amount of knowledge recorded in the Bibliotheca. If the Bibliotheca is not physically manifested, it is required for the wielder to call out the chapter they are using before it takes effect, meaning it can easily be interrupted without a sufficient opening. If the Bibliotheca has been manifested, it is possible to use its chapters without calling out their names as long as the wielder is holding it; but this can be dangerous as it renders the Bibliotheca vulnerable and touchable. A physical defect located somewhere on the Venator Scientiae's body serves as a catalyst to summon the power of their Bibliotheca. If this defect is sealed or severed from the Venator Scientiae's body by any means, they can no longer summon their Bibliotheca until they have healed. All Bibliotheca chapters that directly target the opponent have a maximum range of approximately twenty metres.

The fact that all Bibliothecae will associate themselves with whomever manages to touch them, disregarding the will of their owners, has piqued the interest of Venator Scientiae researchers. It is often speculated that Bibliothecae themselves, like Zanpakutō, possess some degree of sentience independent of their wielders' and refuse to obey those they consider unworthy to access their knowledge. This possibility has raised the question of whether a Venator Scientiae is truly in command of their Bibliotheca or is merely used to satiate its hunger for knowledge until the day they die. By extension, the true nature of Bibliothecae is often questioned as well.

  • Bibliotheca Caput Unus: Facio (ビブリャテカカプテユネスフェシオ, Latin for "Library Chapter One: Construct"): The most basic Bibliotheca technique, that can, unlike proceeding chapters, be utilized without calling out its name even without manifesting the Bibliotheca, Caput Unus encompasses the ability to record knowledge into and physically manifest the Bibliotheca. To record foreign knowledge into the Bibliotheca, the related Venator Scientiae must first witness an event pertaining to a new bit of knowledge; they will only have a small window of opportunity to use this chapter successfully. Recording techniques allows a Venator Scientiae to instantly acquire all knowledge of how the technique is performed and when it was created, possibly allowing them to use the technique for themselves if it only requires that they know how it is performed; more exclusive techniques, such as Zanpakutō abilities, require the use of Caput Quinque to draw out their power. It is not necessary to use this chapter to record knowledge that the Venator Scientiae is simply told of as the Bibliotheca possesses all of its wielder's knowledge by default. Caput Unus can also be used to record locations and unique movements, an essential ability for later chapters. A successful recording is often indicated by a brief glow surrounding the Venator Scientiae's bodily mutation.
  • Bibliotheca Caput Duo: Aboleo (ビブリャテカカプテヅォァボリォ, Latin for "Library Chapter Two: Terminate"): A supplementary technique that draws upon a selected bit of knowledge from within the Bibliotheca and removes it from the recollection of a selected target. In the case of targeting a more simplistic bit of knowledge, Caput Duo has a much higher probability of producing permanent effects; for example, if one were to use Caput Duo to remove knowledge of the location of a grocery store from a particular target, it will almost certainly last until the target is either again informed of the grocery store or locates it by chance. In the case of targeting skills, which are the result of culminated knowledge, the effect is often ephemeral but can still be used to provide an opening as the opponent takes a moment to recall how the technique is performed again. In short, Caput Duo can only encompass a certain amount of knowledge at a time, which is dependent on the size of the user's Bibliotheca. Caput Duo is especially dangerous when used with a manifested Bibliothica as it allows the user to more rapidly remove bits of a target's knowledge. While there is no known method of defending against this technique, it cannot be used against other Venatores Scientiarum and cannot target more than one individual at a time.
  • Bibliotheca Caput Tres: Revocatio (ビブリャテカカプテツリスレボカチォ, Latin for "Library Chapter Three: Recall"): A supplementary technique that draws upon a selected bit of knowledge from within the Bibliotheca and stores it into the recollection of a selected target. Unlike its counterpart, Caput Tres is primarily used to aid a target; skillful usage can even provide the target with enough knowledge to perform new techniques. Caput Tres is often also used to distract opponents during battle by inserting confounding knowledge within their memory to provide an opening. Caput Tres is often preferable in sharing knowledge with any individual to transporting them into the Bibliotheca world as the process is faster and does not risk sharing unintended knowledge.
  • Bibliotheca Caput Quattuor: Gressus (ビブリャテカ カプテクァトルグレセス, Latin for "Library Chapter Four: Tread"): Instantaneously teleports the user to a selected location recorded in their Bibliotheca regardless of distance or dimension. The user may perform Caput Quattuor as many times as they please without any ill-effects but cannot use it to teleport other individuals.
  • Bibliotheca Caput Quinque: Ferio (ビブリャテカ カプテクィンクェフェレォ, Latin for "Library Chapter Five: Strike"): The most common method of using a Bibliotheca offensively, Caput Quinque encompasses all abilities related to using acquired knowledge to physically harm the opponent or strengthen the user. By synthesizing pertinent knowledge involving the use of a certain technique, the user is capable of effectively summoning the power of any technique they have seen before and use it for themselves even if they would be physically incapable of doing so otherwise; this is done by temporarily granting the user the capacity to perform the technique, which often alters their base powers as a result. The base power of the technique is dependent on its power in the hands of the individual the user had originally recorded it from. Should the user summon a technique they are already capable of performing, the recorded technique's power will be added to that of the user's. If the user is somehow physically incapable of performing a technique normally, using Caput Quinque to summon said technique will induce an amount of strain on the user's body dependent on the difficultly of performing the technique relative to the user's skill level or physiological compatibility; a user summoning Agostinha's completed Vox Calamitosus, for example, will almost certainly die afterward. Virginalis and Mater-related abilities, such as Nefas abilities in regards to the latter, are especially dangerous to summon with Caput Quinque because they are derived from different aspects of Agostinha's power. If applied to techniques revolving around spiritual energy manipulation, it is required to call out the name of the chapter along with the name of the technique to successfully summon it, whereas simple extraordinary movements need not be called out in any way. A master of Caput Quinque is even capable of freely synthesizing recorded techniques to produce unique and devastating results. If any individual is sealed into the user's Bibliotheca, Caput Quinque can be used to summon them to the user's current location (in this case, the user must call out the name of the sealed individual).
  • Bibliotheca Caput Sex: Incito (ビブリャテカ カプテセクスィンサイト, Latin for "Library Chapter Six: Quicken"): A supplementary technique that focuses solely on removing every limitation of the Bibliotheca and drawing out its full power all at once. Caput Sex allows its user to use every lesser Bibliotheca chapter without calling out its name whether the Bibliotheca is manifested or not; Caput Sex itself, however, will always require the user to call out its full name before it takes effect. By synthesizing all pertinent knowledge required to perform every single technique and movement recorded into the Bibliotheca and summoning it all at once, the user is granted an otherwise impossible amount of power. The user can instantaneously use and synthesize any technique recorded into the Bibliotheca without any deleterious effects for as long as Caput Sex is maintained. Caput Sex's effectiveness is only amplified with the presence of a manifested Bibliotheca; furthermore, any opponent who touches or directly attacks the Bibliotheca while this technique is active will simply be smitten by the full wrath of its culminated knowledge. While Caput Sex can bestow virtually omnipotent power to the user with an expansive Bibliotheca, with every great power comes an equally profound price, and even short periods of using this technique guarantees the destruction of the Bibliotheca and the death of its wielder upon canceling it. Even if the technique is not canceled, the user's soul will eventually erode from the excessive incompatible power infused within it. Wise Venatores Scientiarum often elect to use this technique for a brief instant to annihilate their opponent before immediately canceling it, but even using it in this manner causes irreparable damage to the knowledge contained within the Bibliotheca along with the user's own memories. Caput Sex is, therefore, a sacrificial technique reserved only for a Venator Scientiae so dedicated to a certain cause that they would cast aside even their knowledge and identity to fulfill its needs.
  • Bibliotheca Caput Septem: Explico (ビブリャテカ カプテセプテムエクスプリコ, Latin for "Library Chapter Seven: Unfold"): All knowledge recorded into a Bibliotheca is "written" within its pages when it is physically manifested. If one were to open a manifested Bibliotheca they, would discover that its pages are apparently blank; but in reality, the pages are simply in a dormant state, awaiting the command of their master to unravel the Bibliotheca's contents. Unlike other chapters, Caput Septem requires that the Bibliotheca be physically manifested before it can be used, meaning it is never required to call out its name. By removing a page from their manifested Bibliotheca and activating this technique, the user can inscribe upon the page all knowledge required for a chosen result, most commonly any sort of technique. An inscribed page cannot be used against its creator, meaning that simply touching it would produce no effect. The inscribed page is granted properties related to the technique it describes; for example, a page describing the nature of an Arrancar's Hierro would be granted durability relative to that of the user if they were using Hierro, hardening the page and allowing it to be used as a shield, whereas a Haien-inscribed page could likely be used as a bomb, thrown at the opponent to explode and produce similar results as the actual Kidō spell. Using recorded techniques in this manner does not yield any deleterious effects on the user. By writing the name of any nearby individual on the top of the inscribed page, the user can actually infuse them with the chosen technique for either offensive or supplementary purposes; an example of a supportive use would be to infuse the individual with a Nefas' Corpus Ubique Praesens, allowing the individual to teleport in a similar manner (at the expense of slight bodily strain) until the Bibliotheca is dismissed; an example of an offensive use would be writing an opponent's name on a Haien-infused page and possibly incinerating them instantaneously, depending on the strength of the recorded spell. Any user is capable of inscribing up to three techniques onto a single page, effectively synthesizing them to produce unique effects. Inscribed pages never dissolve until after they are used even if the Bibliotheca is dismissed, meaning the user can freely carry as many pages on their person as they desire to be used whenever they please; furthermore, a user's Bibliotheca will instantly regenerate any extracted pages, meaning no user will need to worry about accidentally destroying their Bibliotheca from a lack of content. Should the user write their own name on an inscribed page, no effect will be produced.
  • Bibliotheca Caput Octo: Exemplar:
  • Bibliotheca Caput Infinitum: Mortalis Alta Paradiso Rediti (ビブリャテカ カプテェンフィンィテムモタリスアルパラヂソタレヂチ, Latin for "Library Chapter Infinite: Exalted Mortal's Paradise of Return"): The absolute final chapter, along with Caput Ultimus, that requires true subjugation of a Bibliotheca to perform, Caput Infinitum is a legendary technique which very few Venatores Scientiarum have ever accomplished. Unlike Caput Ultimus, Caput Infinitum can, after its conditions have been met, be used regardless of how many other chapters the user can access.


Community content is available under CC-BY-SA unless otherwise noted.