History Main / KeeperOfForbiddenKnowledge

* ''WesternAnimation/AvatarTheLastAirbender'' brings us Wan Shi Tong, He Who Knows Ten-Thousand Things, a spirit in the form of a giant owl who seeks to collect all information in the universe. He once had it all in display in a library for all to see, but eventually realised how [[HumansAreBastards humans used this information to hurt and kill others]], and decided ''all'' knowledge should be forbidden.

* ''LightNovel/ACertainMagicalIndex'': The eponymous Index is a girl with [[PhotographicMemory perfect memory]] who memorized 103,000 [[TomeOfEldritchLore grimoires]] and therefore has an almost complete knowledge of all magic, including the forbidden stuff. She has some kind of immunity to the usual [[ThingsManWasNotMeantToKnow mind destroying effects]] reading those grimoires has, which is why the organization she belongs to had her read them: easy access to all the knowledge they wanted. Unusually for the trope, she's a 14 year old girl rather than some ancient creature.

* ''Toys/{{BIONICLE}}'': Tren Krom was a kind of artificial [[BlobMonster gelatinous]] EldritchAbomination that temporarily [[WetwareCPU controlled the Matoran Universe]] (actually a space-faring HumongousMecha named Mata Nui) before Mata Nui's consciousness was activated. He kept the forces of nature in check and was banished to a faraway island for his services, being one of the few inhabitants to know the Matoran Universe's secret and purpose. [[BigBad Makuta Teridax]]'s EvilPlan hinged on sending his brother Mutran to find Tren Krom and essentially allow himself to get {{mind rape}}d. Mutran [[GoMadFromTheRevelation lost his sanity in the process]] but became the universe's most knowledgeable MadScientist. Teridax used the info Mutran got from Tren Krom to facilitate his takeover of the universe, and also learned tricks like controlling natural forces via MindOverMatter.

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%%* ''Toys/{{BIONICLE}}'': Tren Krom.
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[[folder:Roleplay]]
* ''Roleplay/DestroyTheGodmodder'': Several players have claimed to be or actually are this. The_Serpent is/was the only player with knowledge of the psi-godmodder artifacts.

* In ''Franchise/TheElderScrolls'' series, this is within the sphere of Hermaeus Mora, the [[OurGodsAreDifferent Daedric Prince]] of Knowledge. Mora specializes in ''[[TheseAreThingsManWasNotMeantToKnow forbidden]]'' knowledge, and is the only Daedric Prince who doesn't bother [[AFormYouAreComfortableWith a humanoid form when dealing with mortals]], instead preferring a truly EldritchAbomination form of a mass of eyes, tentacles, and claws. Mora himself claims to be one of the [[TheOlderImmortal oldest Daedric Princes]], a TimeAbyss class of deities, forming out of detritus concepts ejected from reality. Mora's preferred method of seducing mortal servants is to bribe them with gifts of power and knowledge. He also tends to give them absolute freedom, trusting that the lure of the gifts he offers will keep them in his service. His realm, Apocrypha, an [[GreatBigLibraryOfEverything endless library]] containing all knowledge in the form of tomes and very much an EldritchLocation. The sky is an illuminating green in color and it is covered by a sea of roiling acidic waters. Some areas of Apocrypha are consumed by a darkness which kills any mortal who tries to enter it. The realm is haunted by the ghosts of mortals forever searching for knowledge, while it is maintained by Mora's servants, the Seekers and Lurkers. Mora's most famous associated artifact is the Oghma Infinium, a GreatBigBookOfEverything bound in GenuineHumanHide. Those who read it gain immense knowledge and power from it, but it tends to disappear before the reader can read ''[[GoMadFromTheRevelation too much]]''.

* //Literature/DoctorWhoNewAdventures'': The Library of St John the Beheaded collects and stores forbidden texts (both in the sense of banned-by-the-mundane-authorities and in the sense of Knowledge For Which TheWorldIsNotReady). It's definitely got the isolated or hazardous location part of the trope down pat; on Earth, it was hidden away in TheCityNarrows, and in TheFuture it will be located on an asteroid as part of the Braxiatel Collection, which stores texts for which many worlds are not ready. In principle, it's an aversion of the usual some-things-man-should-not-know corollary: the founder believed that all knowledge is useful if handled carefully, and potential researchers are vetted very carefully before being offered access to the collection. (The Doctor, of course, holds the first ticket the Library ever issued.) In practice, though, pretty much every time it's appeared in a story it's because somebody's found a way to use information from the Library to cause trouble.

** The Brotherhood of Steel ''thinks'' they're this. It's more justified in ''VideoGame/Fallout1'', where they keep the secrets of advanced pre-War tech out of the hands of people who might misuse them, like [[UtopiaJustifiestheMeans Unity]]. In ''VideoGame/Fallout2'' it's less justified, as their status has diminished somewhat in the wake of the NCR's rise to power, where we see more of their tendency to raid towns, steal any tech more advanced then a lightbulb and kill anyone who resists, all in the name of "keeping advanced technology out of the wrong hands". By ''VideoGame/FalloutNewVegas'' they're basically glorified raiders in power armor, and their zealous adherence to their antiquated dogmas and methods is slowly killing them.