He believes himself to be omniscient, other people trust him to be omniscient, or both. In either case, the results can be catastrophic.
Maybe he's just a wannabe, a Small Name, Big Ego or Know-Nothing Know-It-All who talked his way into some undeserved credibility. Or maybe he used to be omniscient, but lost his touch - a dethroned Chessmaster who is no longer on top of the Gambit Pileup, a God who surrendered part of his divinity to be able to live among mortals as one of them, or something.
This is the standard way to dethrone an Omniscient Hero so he becomes more interesting, and a common way for protagonists to get to have a chance against something that looked like an undefeatable Invincible Villain.
This turning point is likely to be a retroactive Moral Event Horizon, as it turns out that all the sacrifices were for nothing. If the character has any insight, then such an event is likely to be a My God, What Have I Done? Heel Realization.
Not So Omniscient After All is a great way to Deconstruct certain Aesops and Moral Dilemmas: Make them fall apart by showing how complex the world can be and how hard it is to overview a situation without overlooking a lot of stuff that can prove relevant later on.
Compare What If God Was One of Us?
- At the end of Puella Magi Madoka Magica, Madoka pulls an Abstract Apotheosis and becomes The Omniscient by existing in all points of space and time. Later in Puella Magi Madoka Magica the Movie: Rebellion, Kyubey creates a space that is isolated from all forms of external influence, preventing Madoka from entering it and blocking out her omniscience. However, the show doesn't explicitly say this, and expects the viewers to figure it out on their own. In fact, Madoka does enter the isolated space...but she has to take the form of a human to do so, causing her to lose her omniscience via losing her omnipresence. Even when the isolated space is broken, this gap in omniscient enabled a shocking event to take her by surprise.
- In Dragon Ball Z, Goku is surprised that King Kai with his antennae can observe events of significance in the Milky Way, and telepathically contact anyone in that range; doesn't know where the new homeworld of the Namekians even is, much less be bothered to keep tabs on them, because he assumed that he "knew everything". He was also somewhat alarmed by him knowing nothing of the Cell situation on Earth. King Kai basically retorted that he has a lot of "important godly things" that occupy his time. Goku found him napping in a lawnchair when he met him again.
- In Watchmen, Dr. Manhattan is an omniscient Non-Linear Character. During the storyline, something happens that make him unable to see past a certain point in the future, and he speculates that it could be the fallout and EMP from a large nuclear exchange mucking with his extra-temporal senses. It turns out to be Ozymandias bombarding him with Phlebotinum so that he won't catch on to Ozy's plans too soon.
- Hercules from The Incredible Hercules temporarily became omniscient during the Chaos War crossover. Despite this, he was tricked repeatedly and had to be guided to victory by others. Omniscience is useless if one either ignores it or does not bother to use it.
- Invoked when, for one brief moment, Destiny had his omniscience foiled, according to Lucifer. As Lucifer destroys a page in the book of destiny to Destiny's total surprise. In fact it's the first time he shows any emotion. However the ash falls to spell "Yggdrasil" both answering Lucifer's previous question leaving him with no choice about what to do next, as Destiny had predicted.
- In a different story Destiny gets rid of his book after the interference of people Immune to Fate render it useless.
- This bites Thanos in the ass hard in The Infinity Gauntlet. Even when the gauntlet grants him complete mastery over every conceivable domain of existence —including the mind— he still writes off Nebula as being a mindless, husk of an organism he just keeps around to torture. Even after he usurps Eternity's position of being the omniscient, omnipresent force of the entire Universe... he's still shocked when it turns out Nebula had at least enough mental faculties to simply take the Gauntlet for herself, take his position for her own, and serve as the Big Bad for the remainder of the miniseries.
- Oh, God!:
- Invoked with this dialogue:
Jerry: ...I thought you could tell the future.
God: Absolutely I can tell the future — the minute it becomes the past.
- Once this rule is established, though (and even a bit before) He's shown to be omniscient in every other aspect.
- Invoked with this dialogue:
- In Mortal Kombat, Liu Kang asks Raiden (god of lightning) in the end if he knew all along what would happen. It's hard to tell whether his response is serious or sarcastic. He follows the comment with his trademark laugh.
Raiden: I had no clue. You humans are so unpredictable.
- In Star Wars, the Force can give its practitioners, both Light and Dark side, visions of the past, present, and future. Canonically, the future is "always in motion" and difficult to predict with any kind of accuracy. Still, Emperor Palpatine loves to crow about how "everything has proceeded according to my design," right up until his right-hand man throws him down a shaft to his death, which he presumably did not foresee.
- In Hercules, the Fates brag early on that they know everything... but at the end, are caught off-guard when Hercules gains immortality just as they were about to cut his thread of life.
- Child of the Storm has the canonical example of Albus Dumbledore, while the likes of Loki and Nick Fury can also make an excellent stab at it.
- Doctor Strange, however, outshines them all, to the point where pretty much everyone thinks that he actually is omniscient (a belief he has implied is carefully cultivated). As it is, he's implied to be a combination of Seer and time traveller with the ability to see possible futures. His reputation mostly comes from his habit of knowing what's going on, always being where he needs to be and dropping cryptic hints about what people should do next - which inevitably means that they end up doing what he wants them to do, whether they know it or not, or want to or not. While this doesn't usually seem to do much, since he's planning on a multi-millennia scale, the finale of Book I reveals what it looks like when he gets all of his ducks in a row.
- And chapter 8 through 15 of the sequel, Ghosts of the Past, show what it looks like when he's flying blind... it's not pretty.
- This is the plot twist in William Shakespeare's Macbeth. Macbeth uses the advice three oracles give him to conquer a nation. He was given a warning that "No man born of woman" will be able to kill him. He is later killed by Mac Duff, who "was untimely ripped" from his mother's womb.
- Vetinari of Discworld fame definitely fits the bill, if rarely. See Thud!! and his reaction to what A.E. Pessimal did during the riot.
- In Flatland, the King of Pointland (a dot) knows exactly nothing and sees exactly nothing. The result is that the King has nothing to compare with, and thus considers itself omniscient. The main character ("A Square", a character who is two-dimensional both metaphorically and literally) sees right through the King's delusion, but is unable to make it understand that its knowledge is limited.
- Many characters in the Harry Potter universe hold the view that Dumbledore always knows what's going on and what he's doing. Dumbledore himself, however, is perfectly aware that he can make mistakes.
- In The Lord of the Rings, Sauron can see anything in the world, but can't see everything at once. Much like a person, he has to focus on one particular thing at a time. Therefore while he can see anywhere in the world, this doesn't help him if he doesn't know where to look. The heroes use this to their advantage by distracting his attention from Mordor, allowing Frodo and Sam to pass through unnoticed. There are also a few creatures in Middle Earth who are capable of blocking his site from certain areas, but in such cases he knows he is being blocked. He's also capable of misinterpreting what he sees.
- In Mistborn, the Lord Ruler thought himself to be completely invincible with absolute knowledge of everything in his empire due to his Inquisitors and Kandra spies. He also thought that since he knew every metal (he didn't) and every other character was ignorant of the true number of metals he would be unbeatable. He did not expect to be defeated by Vin wielding Malatium, who was able to figure out his true identity and his weakness; his reliance on the metalminds he wore.
- The Dresden Files:
- The power of intellectus is the ability to know the answer to a question just by asking it without going through the usual channels of learning it. At first confused with omniscience. The difference is with omniscience one knows everything all the time. Intellectus only lets you know something when you ask the question. Both limited in you have to ask the right questions and so far the only beings who have it have it in a limited form.
- Intellectus also doesn't tell you why. For example, using it to find out how to hurt Harry Dresden will tell you to go after his friends and daughter. It will not tell you that this is because he loves them or that he will respond by grabbing as many weapons as he needs to end you.
- It is also limited to the domain of the entity holding it. For an ancient island containing intellectus, the island will know everything that happens on its lands and shores but not about the region beyond or even a person standing on a dock connected to the land. Angels, ancient gods, demons, and Mothers Summer and Winter likely have a wider range of knowledge.
- The Belgariad:
- The Prophecy normally knows everything except for the outcomes of key meetings between the Child of Light and the Child of Dark. It usually sets things up far in advance, but in the fourth book, when Olban tries to kill Garion the Prophecy warns Garion at the last second, suggesting it didn't see this one coming.
- In the prequels, Belgarath and the Alorn kings' theft of the Orb of Aldur from under the god Torak's nose was intended to be a foregone conclusion, as it wasn't an EVENT (the Prophecy of Light won the last one)...but neither Prophecy anticipated that Torak would refuse the Dark Prophecy's orders by attempting to reclaim the orb personally. After a moment of panic and hasty negotiation, both prophecies agree to allow the orb to be used against him.
- Merlin Athrawes has access to uber-high tech spying devices which give him near-omniscient spying capability. Especially considering that his enemies are all using renaissance-level tech. However he can't keep up with everything at once, and things occasionally slip past him; resulting in much guilt on his part over things that happened that he feels he should have been able to prevent.
- Also a critical problem for him is that he can't send his gear too close to the Church's headquarters for fear of tripping still functioning high-tech sensors. This results in critical knowledge gaps if the plans being developed are kept sufficiently quiet: the terrorist attacks such as those in the fifth book, How Firm a Foundation, are an example in that Merlin had no idea they were coming.
- There's a brief moment in Blood Meridian where Judge Holden, the hyperintelligent, demonic something-or-other who, before and after, never seems to fail at anything, loses track of a member of the Glanton gang... and genuinely can't account for him. Even fellow gang member Toadvine is surprised and thought the judge knew where he went. The judge seemingly makes a point of never mentioning it again, although later in the book, he makes it his stated purpose to know and understand everything in the world and so take control of his destiny, or words to that effect.
- The Cosmere: Hoid is a centuries-old worldhopper with access to most of the overpowered magic systems. He spends most of his time in the shadows, offering cryptic clues to main characters to steer them in the right direction. Part of this is due to a magical ability to sense when and where important events are happening, so he knows just where to push to make things go the way he wants. He still has limits, however. In Mistborn: The Original Trilogy, he was looking for the Well of Ascension, but spent most of book 2 wandering in the Terris Dominance since the Lord Ruler had shifted the land to mask the location of the Well. There are also more minor examples; in The Stormlight Archive, Hoid is happily surprised to find that the Ryshadium are near-sentient horses of great strength. He privately notes that he's glad he can still be surprised after so long.
Kaladin: What do you know?
Hoid: Almost everything. That almost part can be a real kick in the teeth sometimes.
- Stargate SG-1:
- Evil versions occur with the Goa'uld and the Ori. The best, and therefore most recurring, way to convince the Goa'uld's or Ori's followers that their gods are false gods? Show they're not omniscient, usually by figuring out a way to kill the former or kill the Priors of the latter.
- The beginning of Teal'c's defection (or just the end of his faith in the Goa'uld) came when he decided to disobey orders, allowing a prisoner to escape, then lied to his "God" about having carried out the order to kill. Apophis believes him and you can see the look in Teal'c's eyes confirm everything he had feared.
- An episode involves android duplicates of SG-1 getting captured by Cronus. Robot!Daniel is about to be executed by a staff weapon blast to the face. The blast results in his head flying off, showing everyone that he's not human. The look of utter shock on Cronus' face convinces a large number of the locals that he cannot possibly be a god.
- Happens on and off with the First Evil in Season 7 of Buffy the Vampire Slayer. There are plenty of instances that show the First Evil is both omniscient and omnipresent, as it seems to be constantly lurking in the background watching the protagonists (even multiple places at once), and knows exactly how to mess with each character with great success. Yet at other times, the protagonists seem to surprise it with their plans, such as Andrew wearing a wire to reveal the First Evil's plans, and the Slayers and Potentials opening up the Hellmouth to lead an offense. Really, whether or not the First Evil is omniscient is entirely up the writer and seems to be turned on and off like a switch depending upon the needs of the plot.
- Doctor Who:
- The Doctor can often be perceived as omniscient; he's one of the most intelligent beings in all of the universe, with an excellent knowledge of culture, science, history and language, and manipulative enough to initiate many a plan. To many, he appears like a God figure, with titles such as 'The Lonely God' and 'the Oncoming Storm' (or if you're a Dalek, the Destroyer of Worlds). But he can make mistakes, and he makes them hard.
- In the episode "Midnight", he is constantly expected by the human characters to know exactly what is going on, but as he insistently tells him time and time again, the entity they encounter is something he literally knows nothing about.
- The episode "The Satan Pit" demonstrates that even some of the Doctor's assumptions about the fundamental nature of the universe can be entirely wrong when he encounters something that makes an excellent play at being Satan, which uses script so old that even the TARDIS can't translate it.
- Star Trek: Deep Space Nine: Enabran Tain. Even in retirement The Spymaster stays on top of everything, right down to knowing when people have made impulsive, last minute decisions to visit him and what their favorite drinks are. In the end, he comes out of retirement to head a joined Obsidian Order/Tal Shiar task force intent on destroying the Dominion. It does not end well. Unfortunately, he doesn't realize that his second-in-command (the Tal Shiar leader) is actually a disguised Founder who had instigated the entire task force with the intention of wiping out both organizations as a prelude to invasion. When Tain realizes what's happened, it's too late, and he observes to Garak that he's clearly lost his touch because he'd never have been deceived prior to his retirement.
- Despite being able to see the future and being established as both a Manipulative Bastard and The Chessmaster, Rumpelstiltskin from Once Upon a Time is continually blindsided by various foreign-factors that continue to catch him by surprise, including falling in love with Cora and Belle (and the various hurdles and complications that come from it), meeting Zelena, the prophecies boy that is his undoing being his own grandson, etc. Justified, considering the Seer that granted him his prophetic abilities explained that he sees multiple probable futures and is forced to cherry pick the most likely of them to make any sense of it.
- Destroy the Godmodder: The godmodder. Omniscience was supposedly one of his abilities. He lost. He got the stuffing beaten out of him, and generally didn't do very well. He still hasn't figured out that he doesn't know everything though...
- Here in our very own Avatar Arena, the Worker of Secrets gets hit with it, courtesy of Trolldoka.
- Psionics: The Next Stage in Human Evolution: Scryers can do amazing things, but there are limits to their powers.
- The Psychometry talent can give you a perfect understanding of an event that happened in the past as thought the you were an omniscient, neutral observer, but you're more likely to get random thoughts or glimpses of what was witnessed by people who were there. It gets more likely that you'll get the omniscient perspective as you gain levels in scrying, but you're never guaranteed to get the best result.
- Precognition can give you prophetic dreams, but (if you fail a secret will check the GM makes and they feel like jerking you around a bit) sometimes it will give you dream with false information instead.
- You need to have telepathically communicated with someone in the past to use Mind Scan to locate them and it doesn't work outside of your clairsentience range.
- The Fatal Flaw of the Sidereal faction is to get into large groups, predict the future, and then make horrible, horrible decisions. One time they did this, right before the Usurpation, led to the temporary annihilation of the Solars, mass deaths among the Terrestrials, and genocide against the Solar's allied races, in order to establish a lesser but safer and more stable response to the Golden Age. So many beings in Exalted have Screw Destiny as a passive power, though, that this eventually led to the deaths of nine tenths of the human population of Creation.
- The Maidens of Destiny (most particularly Jupiter, Maiden of Secrets) are, between the five of them, virtually omniscient, able to use their powers (and authority in the Celestial Bureaucracy) to know virtually anything. They do have certain limits; there are some things that are not in any of their domains, their fellow Incarnae tend to escape their vision (the Unconquered Sun is big enough that prophecy kind of warps around him, and Luna is extremely unpredictable), and there are some things (like the creation of the Exalted) that they just don't see coming (although it's vague if this is because the source of their visions doesn't know it either, or if it simply withholds the information from them).
- In Devil Survivor your constant screwage of destiny causes the future-predicting Laplace Mail system to start barfing out errors and eventually shut down.
- Moebius spends most of the Legacy of Kain series being an excellent Chess Master who manipulates everyone else into doing exactly what he wants, but he slips up towards the end of Defiance when he gloats over Kain's death, only to realise Kain is alive and standing right behind him:
Moebius: It is a small price to pay for Kain's demise.
Kain: You're a bit premature...
Kain: Is there a crack in your omniscience after all, Moebius?
- BlazBlue had the supercomputer Takamagahara which was omniscient by virtue of being able to observe every single variation in the time-space continuum at once. However, when Big Bad Hazama / Terumi pitted Ragna The Bloodedge and Kusanagi: Sword of the Godslayer against each other, all three minds got so occupied with observing the possibilities of the battle that it lost track of one possibility for 1/470000th of a second. That lapse in attention, it turns out, was all Hazama/Terumi needed to infiltrate Takamagahara and expose it to a magical supervirus, thus putting it out of commission.
- In Dragonfable:
Vaal: How can I be omniscient when people do not tell me what they are doing?!
- In Kingdoms of Amalur: Reckoning, people who rely on Fateweavers to know how things turn out are always caught off guard when the Fateless One gets involved.
- Messiah mentions that the Earth government has discovered ways to keep some secrets unknown even to God; hence why God dispatches Bob the angel to Earth, to gather intel.
- A good half of the plot in Command & Conquer 3: Tiberium Wars: Kane's Wrath, is juggling threads behind the scenes so that the eponymous Magnificent Bastard can pull off his usual schtick in the main storyline. From Rio to Sarajevo to Egypt, Kane is always one step ahead, but only through considerable effort on behalf of his top-secret special forces. And Alexa Kovacs's scheming and betrayal of Killian and Kane himself comes as an outright shock even to the master manipulator.
- In Kid Radd, The Seer, who else? has one of these moments when he takes over Crystal's body, taking away his omniscience and causing him to miss two vital things that let Radd win: the Lucky Penny and the health power-up inside Bogey (or perhaps just Bogey's presence inside Chimera). Doubles as a Villainous Breakdown.
- Doc Scratch in of Homestuck is functionally omniscient. He still has gaps in his knowledge. Though due to his enormous intellect he's often able to fill those gaps in with near-perfect deductions, so he doesn't mind so much... usually. His gaps are mostly caused by the Power of the Void and Alternate Timelines. He also has some trouble with Spades Slick and the author.
Doc: How were you able to contact me? Oh, never mind, I figured it out instantly.
- 8-Bit Theater:
- Sarda is shown to be completely omniscient until Red Mage finds one place he can't get into - his a-hole. That is, where the Light Warriors end up when Red Mage puts them between two portable holes (the a-hole and the b-hole) and drops them into each other.
- Despite making several comments about his non-linear view of time letting him see all of history before it happens, Sarda is still susceptible to the Rule of Funny. Bikke manages to surprise him by throwing an orb of power at him. Sarda is so impressed that he lets Bikke live.
- Dubious Company's heroes ask Phred, why he can't just kill Kreedor. Phred gives 3 reasons: Kreedor is the better fighter, the other gods don't trust Phred, and manipulating the odds of success is just wrong.
- In Dan and Mab's Furry Adventures, the scariest thing a Phoenix Oracle can say to a person is "I don't know."
- Psionic Minmax in Goblins is a Clock King who can use his genius-level intellect coupled with his knowledge of the Maze of Many's reset mechanics to accurately predict how each of the parties travelling through the maze will behave... until Kin decides to take a course of action that he could have absolutely no way of predicting. As a result, at one point he confidently makes a prediction that he has at least 8 minutes to finalise his plans before any of the other parties have a chance to finish the maze, only to emerge from his hideout to find Kin and Forgath standing by the maze exit, thanks to a Dungeon Bypass.
- Dominic Deegan, as the series progressed and he got more powerful, would occasionally slip into this. Sometimes, it was due to overconfidence due to his belief in his own plans causing him to overlook small details, or from things and creatures serving an Outside-Context Problem that his second sight couldn't get a bead on.
- Avatar: The Last Airbender
- In the Avatar: The Last Airbender universe, people trust the Avatar to be the world's intelligent, skillful, omniscient and pretty much perfect savior. Too bad Aang's just a kid who was trapped in an iceberg for a hundred years. He's still wise for his age when he takes things seriously, but he's also much more gullible and ruled by his emotions than an older, more experienced man would be.
- It's not much better in The Legend of Korra. The Avatar this time around is a teenage girl who was raised in an isolated compound for most of her life and thus has no idea how to handle real life matters like politics, romance, laws, or even buying food. She's skilled at bending, with the exception of Airbending, but not much else. The people of Republic City still trust her to be the perfect hero that will solve all of their problems. The look into the past explaining the Avatar's origins reveals that the Avatar was never a perfect savior. Both halves of the original Avatar, the spirit and the human, were well-intentioned but flawed people who caused almost as many problems as they solved. It's also made clear that every Avatar was just an ordinary person trying their best to bring peace to the world and just as prone to making mistakes as anyone else.
- From the Futurama episode "Godfellas," when Bender meets a being who may or may not be God (it isn't sure itself):
Bender: So do you know I'm going to do something before I do it?
God Entity: Yes.
Bender: What if I do something different?
God Entity: Then I don't know that.