Razputin: So this is it... the mental world.A Mental World is any world that exists inside a person's mind (or heart, soul, whatever, but not their physical body). Similar to Dream Land and Cyberspace, a Mental World does not follow the regular laws of physics, and may ignore or respond badly to characters trying to use logic or force. This world is usually entered by some type of telepathy, either magical or technological; if the character whose mind contains the Mental World is sleeping or unconscious, then their individual dreamworld may be physically attached to a larger Dream Land or collective unconscious, which makes it enterable by other dreaming or meditating people. Symbolism is king here, sympathetic magic may be in operation, and puns, metaphors, and metamorphoses may be common. Because this world is based on an individual's (possibly incorrect) beliefs, it may contain multiple Evil Twin versions of both the owner's personality and that of anyone else (s)he knows, especially the people exploring the world. Sometimes this works in the other direction, and changes made inside the Mental World may change the beliefs of the individual who is the source of the world in question. In other cases, this Mental World is more like a magical pocket dimension where the controlling mage can wage battles, imprison others, hide themselves from enemies, or even take a friend for a vacation. In this case the world does not necessarily exist strictly inside the character's mind, but still behaves as if it does because it is woven out of that person's magic and actively connected to that person's mind (and still generally representative of their "self"). Oftentimes the world is surreal and barren and may be a space-like void with stars, multiple suns, and small chunks of floating rock or debris that may be used to get about, like stair-steps. See also Journey to the Center of the Mind, Vision Quest. Tends to be a Wackyland, especially when exploring one's personal mind. For certain specific locations within Mental World, see Happy Place and its opposite, the Black Bug Room. Not to be confused with Womb Level.
Elton: It looks like a dentist's office.
Razputin: A mental dentist's office!
Elton: It looks like a dentist's office.
Razputin: A mental dentist's office!
open/close all folders
Anime & Manga
- Paprika, based on Yasutaka Tsutsui's 1993 novel of the same name, involves people's Mental Worlds — or rather, their dream worlds — leaking out into reality.
- In the memorypunk universe of Kaiba a relatively common device is utilized which allows one to literally step into the mind of another person or simply click through their memories like a slideshow.
- In Rozen Maiden, everyone's dream worlds are connected through the World Tree. Somewhere inside any given person's dream world is a tree that represents that person's mental and emotional well-being.
- Soul Eater has several examples.
- When the Weapons are transformed, they seem to exist (naked, usually) in a black, infinite empty space, which can sometimes be seen from outside as uncanny reflections on their metallic surfaces. Liz and Patti seem able to actually move around (Patti on one occasion turning up on Liz's “side.”)
- Soul's soul is depicted as a red and black decorated room with a piano in it. This may or may not be down to his having been infected with the black blood (we see it only after the Italy episode, but he has a longer history with the piano and what it seems to represent for him).
- Tsubaki's soul changes between a dark world filled with long, looming shadows and a clear blue sky over water, depending on whether or not her brother is involved and how it's being used.
- Crona's soul is depicted firstly as an empty desert in which Crona is sitting in circle, where their insane/sad side is shown as a shadow. When Maka enters her soul and convinces Crona (both represented as young children) to leave the circle, the desert is replaced by an island with a blue sea surrounding it. The anime later uses this imagery when Crona runs out of Death City into an actual desert and somehow ends up in a big hole.
- In Bleach, all shinigami have an inner world where they commune with their zanpakutou spirit. However, only Ichigo's has been detailed to the readers. His consists of a city of skyscrapers and gravity is at right-angles to normal, meaning he fights his mental battles on the sides of buildings rather than the roofs. When he starts turning into a Hollow in the Shattered Shaft, however, gravity rights itself and the buildings begin to dissolve. Underneath the ground is a flooded world which represents despair. When his world floods, it means he's either in, or sinking towards, a Heroic B.S.O.D..
- In Naruto, the main character oftentimes finds himself inside of his own mind, face-to-face with the Kyuubi for which his body serves as the container.
- Also, one of the abilities of the Mangekyou Sharingan is the ability to trap an enemy's mind in a mental landscape complete with crosses and a weird red moon, in which time is altered so that days pass over the course of seconds.
- Negi of Mahou Sensei Negima! was once trapped in his own Mental World represented by the Elaborate University High he teaches at with his Sink-or-Swim Mentor Evangeline slaughtering him for days in a world he can't completely die in. This was required to unlock his Deadly Upgrade. A bit of physical Blood from the Mouth was in order.
- Mad Scientist Dr. Kanzaki from Black Cat has the tao power of "Warp World", which creates one of these. He has total control over the contents and the senses of the people within.
- Yu-Gi-Oh! features this in the Millenium Puzzle, where the mind of Yugi is separated into two worlds, one which is like a toyroom to symbolize Yugi's naivete and innocence as well as his love for games and the other of which is a mishmash twist of traps, mazes, and planes that defy the laws of physics to symbolize the depths of Atem's soul. To note though, if you fall to one of Atem's traps in the area, even if he did not want to kill you, you can still end up brain dead.
- One issue of the manga also showed Anzu's mental world, which was filled with things that emphasized her dreams of becoming a dancer.
- There are a few of these in Chrono Crusade, mostly shown when Rosette "dives" into a person's soul. Azmaria's world looks like a graveyard in pouring rain (although it's possible this was influenced by the demon possessing her at the time). Chrono's looks like the grave he was sleeping in when Rosette found him. It's also possible that Rosette's is a train, but given what was happening when we see her there, it's quite likely that was just her world's version of Purgatory.
- In Psyren, Lovable Coward Kabuto's powers are derived from a mental world, where a subconscious creature named Yoyo resides.
- Similarly to the Black Cat example, Road Kamelot in D.Gray-Man can draw people's minds into a world where she has total control. The one time we've seen her use it, she Mind Raped Lavi by confronting him with his Becoming the Mask.
- Code Geass has the World Of C, the world that is the link between Human Consciousness (including the memories of the dead) and the waking world which has a link to Geass... that no one ever explains, or possibly even knows about.
- Also, there's the White World, a mental world that C.C. and Lelouch appear in once, butt naked, while their minds are linked or something...
- And finally, C.C.'s World of Memories. When C.C. locks away her own code, she buries herself in a world filled with paintings that represent her memories... with some sort of caretaker C.C. walking around. Which, again, never explained, though I suppose the concept is common enough for people to understand.
- His Coool Seha Girls: The final episode reveals that everything that happened in the series took place in the minds of the creative geniuses at Sega, and graduation meant each girl would venture forth into the real world as a video game console.
- Shinji from Neon Genesis Evangelion frequently lapses into a hallucination of himself sitting in a commuter train at sunset. He's usually accompanied by a child version of himself sitting in front of the sun though at later points he sees Rei instead; sometimes he sees both at the same time with Rei standing to his left. The topic of conversation is always piloting. In End of Evangelion, he gets both Rei and Asuka at the same time: Rei sitting in her usual seat and Asuka standing right in front of him, one leg propped up onto his seat.
- While he's swallowed up in his Eva, he gets a radically different and very vivid hallucination implied to have been caused by Yui.
- And of course there is the original depiction of Instrumentality: the subject of the hallucination sitting in a chair, surrounded by various people while they mercilessly dissect his/her personality.
- In the TV series of Record of Lodoss War, Neese has to fight the spirit of Naneel within her own mind, over control over their shared body.
- The Witch's Labyrinths from Puella Magi Madoka Magica act as Mental Worlds that reflect the Witches that reside in them. Humans who stumble into a labyrinth usually do not leave alive, and a Magical Girl takes her life into her hands every time she enters one in order to fight a Witch.
- Spider-Girl has ventured both into her own mind and that of her father. The first is a typical Journey to the Center of the Mind, but the latter is much more up-front, as May struggles to free her dad from being mentally enslaved by the Green Goblin.
- The 1990s Marvel Comics character Sleepwalker became banished from the Mindscape and trapped in the mind of human college student Rick Sheridan, and could emerge into the human world whenever Rick slept. When Rick was awake, Sleepwalker was forced to stay in Rick's mind and often interacted with different parts of Rick's personality and memories.
- Elsewhere in Carla Speed McNeil's Finder is one of these, though outsiders can visit Magri's brain via technological means.
- X-23's inner world (as we see in her eponymous series) is barren and hellish, filled with the skeletons of everyone she knows and populated by only ravens and white wolves. (And Satan, but it's unclear whether that being was really demonic or just a manifestation of her self-hatred.) Given that she's a suicidal, badly traumatized Tykebomb, this is very fitting.
- Alan Moore is really into the concept of a "London of the mind" made out of the shared history, memory and thoughts of its residents. He explores the concept in From Hell, where Jack the Ripper's goals have their roots in this concept. He also explores them more specifically in his spoken-word album The Moon and Serpent Grand Egyptian Theatre of Marvels.
- In Poet Anderson: The Dream Walker, Jonas assumes this of Genesis when he first sets foot in the Dream World, but Alan explains it's actually created by the subconscious dreams of humanity.
- In Human Of The Other Side, the character Raim Hanta's mind has reproduced several location of Japan he has visited. However, inside of it, sometimes a weird crossbreed between The Heartless and light doses of Psychological Horror, appear in order to kill him and/or screw his mind. The laws of physics there are fairly normal, but then he figures out he can walk over the surface of buildings. Oh, and there's a bridge which spirals up to the heavens. Damn his mind is messed up.
- Toy Hammer has the 'mindscapes' which seem to be a Mental World mixed in with Forge Mode of Halo; characters can create and use weapons, buildings and whatever they wish to create and fight in this manner. Used to its full extent with weapons being thrown away in favor of creating new ones, buildings being used in miniature Colony Drops and a literal wall of Gatling guns for... crowd control.
- A recurring subplot in Queen of All Oni is the looks inside Jade's mindscape, and the struggle for control of her mind between the Aspects of her personality, primarily Hero (representing her inherent goodness) and The Queen (Jade's Superpowered Evil Side). The mindscape itself is a sea of clouds (literally, they act like water) containing islands whose landscapes are made up of and represent Jade's memories and interpretations of things in her life.
- In The Mind of the Doctor, one is briefly created from the Doctor's mind when the War-Feeder and evil side of him try to gain physical form.
- A Protector's Pride takes the Bleach concept of manifesting a Zanpakutou a step further: it's theoretically possible to manifest a Shinigami's entire inner world.
- Intercom: Well, it is based off of Inside Out. Only this time, Riley's going to be visiting it! And talking to her emotions!!
Films — Animation
- Inside Out takes place primarily in an eleven-year-old girl's Mental World, with her anthropomorphized emotions, who are in charge of the decisions she makes, serving as the main characters. Most other mental concepts are depicted as places, such as the Halls of Long-Term Memory, Imagination Land, and the Train of Thought. It is shown through brief asides into other characters' heads that everyone's mind works this way.
- Elephant's Dream takes place inside a giant machine which, according to Word of God, is a representation of an idea that only the main character, Proog, believes in or understands, which is why the deutoragonist, Emo, doesn't seem to notice many of the things going on around him.
- My Little Pony: Equestria Girls – Legend of Everfree: When Sunset Shimmer gives a try at reading Pinkie Pie's mind, we get an utterly Mind Screw scene with Pinkie strolling among anthropomorphic sweets (from which she eats some parts in passing) and other wacky characters in a complete Sugar Bowl environment. The novelization makes it even wilder, with multiple Pinkies diving into a giant swimming pool filled with fudge, and a giant jelly bean handling her a marshmallow towel (which she eats).
Sunset Shimmer: [visibly disturbed] That... explains so much...
Pinkie Pie: Yep!
Films — Live-Action
- Being John Malkovich features a climactic chase scene through the titular character's unconscious mind.
- As does Eternal Sunshine of the Spotless Mind, also written by Charlie Kaufman.
- In Jim Henson's Labyrinth the eponymous labyrinth seems to be a magical extension of the mind of Jareth the Goblin King, and the crystal balls he uses each contain an illusionary world in which he can appear.
- The Cell is about a psychiatrist entering a now comatose serial killer's Mental World to find the whereabouts of his last captive before it's too late.
- The 1984 movie Dreamscape, in which certain people can go into the mindscape of dreamers, only the dreamer may not survive the encounter. Cue Dennis Quaid trying to save people from a psychopath who has learned how to enter dreams and then control them.
- Terry Gilliam's entire catalogue is this trope; he may have finally gotten it out of his system with The Imaginarium of Doctor Parnassus, in which an old man has a magic show in which he transports people into their own minds. Then he and the Devil present them with a choice to pursue beauty/truth/imagination or selfish id-fulfillment.
- Most of Inception takes place in a dream within a dream within a dream. But what really takes the cake is Limbo, where a dreamer can construct their own entire world, completely from scratch.
- In Sucker Punch the brothel and fantasy worlds take place in Baby Doll's mind.
- Pat Cadigan's virtual reality novels and short stories, especially Mind Players, feature characters exploring their own or others' minds, often for therapeutic purposes.
- Melissa Scott's Silence Leigh trilogy (aka Roads of Heaven) has one character doing telepathic therapeutic work inside another's mind.
- C. S. Lewis' The Shoddy Lands explores a drab and self-centered landscape inside the head of a young woman.
- Similarly, Hell in The Great Divorce is a place where the damned can make their thoughts quasi-real. Since they aren't actually real, their functions are a bit impaired—houses don't keep out the rain, for instance. Really real things are the province of Heaven, and aren't subject to the whims of mere human thoughts.
- In Young Wizards book A Wizard Alone, the protagonists enter the mind of an autistic wizard several times.
- In the Discworld books, Samuel Vimes's mindscape is the city of Ankh-Morpork, empty at night, and it is always raining. The half-demonic entity trying to take him over in Thud! finds itself completely lost in this dark, unwelcoming city for a while before it's eventually kicked out. Remember, Sam Vimes loves dark and rainy nights.
- 1970s short-lived modern pulp series "Weird Heroes" had Doc Pheonix, a shrink who could enter patient's minds to fix them from the inside. One story had him treating a girl whose mental landscape was a nightmare version of Oz, with a demonic Raggedy Man standing in for her abusive father.
- Storm Constantine's novel Burying the Shadow involves a realm called the soulscape, which connects all people on a subconscious level. An individual's soulscape reflects their mental and spiritual health.
- In Kieshara, falcon shapeshifters who surrender to The Corruption fall into the ecl, a comatose, depressive state where they are trapped in their own Mental World. It's possible to escape ecl, but it requires an insane amount of Heroic Willpower and, often, the assistance of a person outside in the real world. But only falcons have the telepathic magic necessary to contact someone in the ecl, and doing so would risk that they themselves fall into the ecl, so people hardly ever escape from it. Hai's mental landscape is chaotic, constantly warps the laws of physics and has a lot of snake and falcon imagery, no matter what form it takes. The latter is a hint as to her hybrid parentage. The series' usage of this trope actually has a lot of clinical depression subtext, if you interpret it symbolically. In particular, the dialogue between Nicias and Hai while he is trying to save her from the ecl is very reminiscent of that between a therapist and his patient.
Hai: You can't help me.
- Farscape. Since the implantation of Harvey, neural clone of Scorpius, Crichton had a shipload of mental world scenes- some based on places taken directly from his memory, others completely fantastical. But the most memorable was the Road Runner parody cartoon.
- One episode also allows a neural clone of Crichton to enter Scorpius' mind, depicted mostly as a dark shadowy landscape obscured by thick clouds of fog.
- Happens quite a bit in the Battlestar Galactica finale, as it's shared by several characters. What makes it interesting is that becomes a waking hallucination for everybody involved.
- In The Outer Limits (1995) episode "Mind Over Matter", a computer technician can use a specialized mainframe to enter the mental world of people trapped in comas. He uses this to try to save his love interest. Unfortunately, the protagonist forgot A.I. Is a Crapshoot with unusual results.
- The series finale of St. Elsewhere reveals that the entire show was a product of an autistic child's mind.
- The Attic in Dollhouse is revealed to be a long chain of nightmarish Mental World scenarios chained together to be a giant super computer.
- Sam is stuck in one in the season 6 finale of Supernatural after Castiel destroys the mental barrier that is keeping his traumatic memories from potentially turning him into a vegetable.
- Dean and Sam also enter Bobby's nightmare world in another episode.
- In Hunter Heroici, a powerful psychokinetic has retreated into one due to his advancing age, which is causing problems in the real world, but the man is oblivious to Sam's attempts to talk to him. So Castiel ports both Sam and himself directly into the man's mind, which appears as a cartoonscape, then turns to static and technicolor bars once the guy realizes that there are people in his head and starts talking to them.
- Star Trek loves these:
- When Captain Picard is almost fatally injured in The Next Generation, he meets Q in a featureless white space and is told he is dead. While Q gives him a chance to change his past and prevent his death that way, his body is shown to still be in sickbay, so most of the episode purely takes place in his mind. Q really only wanted him to understand why he is the man he is now. Unless It Was All A Dream.
- The holodeck is variously used to represent the subconscious of Data and the of Enterprise itself. The holodeck allows the crew to see their inner workings through metaphor and symbolism (with Counselor Troi helpfully pointing out their meanings). Justified in that both are essentially computers, so they can be interfaced with the holodeck.
- The Prophets in Deep Space Nine usually communicate with people within their minds, appearing as people the person knows well in a place familiar to them. (Which also saves a lot of money for special effects.)
- Though it seems to swallow up a persons body, the Nexus in the movie Generations has all the aspects of a Mental World.
- In Red Dwarf the crew encounter a "psi-moon", a physical planet that warps itself into the representation of someone's Mental World. Unfortunately it chooses Rimmer, leading to them being attacked by little black-cloaked figures that represent his self-loathing.
- Used as a premise for Into The Universe With Stephen Hawking, in which all scenes where Benedict Cumberbatch takes over the narration from Hawking are presumed to be thought-experiments playing out within the master physicist's mind.
- Kamen Rider Wizard. Here they're called the Underworlds, and are the spiritual landscapes of Gates, people with magic potential and where Phantoms are "born". In order to defeat them before they can kill the Gate and wreck havoc in the real world, Wizard has to embark on a Journey to the Center of the Mind.
- Warhammer 40,000's Warp is a collective Mental World of the dreams and emotions of every sentient creature in the galaxy. It's also the only afterlife and home to 4 Chaos Gods (plus a few more) and an arbitrarily large number of demons. That's mainly because most sentient creatures in the galaxy don't have very much love or friendship. The Chaos Gods actually represent both positive and negative emotions, just taken to the extreme. Since they gain power from the emotions, they want their followers to feel as strong emotions as possible. So the daemons of the god of love rape you to death. Also home to the Ork gods Gork and Mork, the psychic manifestation of the Ork race. Given that the Orks' vast numbers and simple mentality (endlessly enthusiastic and no real concept of defeat or despair), Gork and Mork appear to be invulnerable and portrayed as simply laughing off any attacks by Chaos gods. Fortunately for everyone else they seem to have no plans other than cheering on the Orks and bashing each other over the head.
- In Exalted, high essence Green Sun Princes can get something like this. It's a soul world rather than a mental world, but same basic thing.
- In New World of Darkness, both Mages and Changelings can travel into, and warp both their own dreams and the dreams of others.
- Mages can go further beyond the mere subconscious and into a person's Oneiros (one of the three Astral Planes), which is their own soulscape. It contains the Anthropomorphic Personification of their desire for self-improvement, their darker urges, their fears, and their Flaws and Derangements (if they have any). It also contains the sum total of all a person's knowledge and experience, albeit shrouded in metaphor and symbolism (or in the case of memories, the subjectivity of the experience). It's possible to travel even deeper into the Tenemos, which is the collective unconscious of humanity.
- Archmasters can make internal sanctuaries called chantries by finding a location they identify closely with and forming a physical reflection of it within their souls. Though not as mutable once they're made, they are manifestations of the mage, who is as aware of the chantry as of their own body.
- American McGee's Alice has Alice fighting in Wonderland - a world that represents her mind. Given that at the time Alice is in an asylum, Wonderland is virtually a nightmare, twisted by her insanity and depression.
- The entire premise of Psychonauts is based around entering the mental worlds of others and fighting their Freudian Excuses. Some examples: An army-obsessed drill sergeant wannabe's mind is a Remilitarized Zone obstacle course (Starting, as the page quote alludes, in a recruiting office). A Stoic's mind is a perfect, flat cube. A fun-loving lady's mind is a dance club with a perennial party going on. A paranoid schizophrenic's mind is a twisted neighborhood where everyone and everything are disguised agents of a malevolent conspiracy, etc., etc. They put a great deal of thought into each available mind's quirks, to say the least.
- EarthBound has Magicant, Ness's Mental World which he is forced to travel into in order to confront his inner demons.
- EarthBound Beginnings also has Magicant expect it's Maria's Mental World.
- The dungeons in Persona 4 are created from the subconscious of people who are kidnapped and thrown into the TV World. The ending reveals that the TV World itself is a reflection of humanity's collective unconsciousness.
- Similarly, the Palaces in Persona 5 are created from the distorted views of the world of the people the Phantom Thieves targets (the Jerkass gym teacher who abuses his students sees the school as a castle where everyone else is his slave, the art mentor who steals his students artwork and passes it off as his own sees the shack he keeps his students in as an art gallery where the students are nothing more than exhibitions to be shown off, the greedy Mafia boss who blackmails high school students sees Shibuya as a giant bank and everyone is an ATM that he can drain of money, etc.) Like in 4, the alternate world the Palaces are located in, the Metaverse, is itself formed by humanity's collective will.
- In Shadow Hearts I and II, Yuri's Mental World is a graveyard, where monsters embodying his flaws and fears roam, waiting for him to fuse with their souls. It has an actual influence on the real world, as it finally digests Alice's soul.
- One key aspect of Silent Hill is the blurring between the physical world and the Mental World of a powerful psychic. Also many of the monsters that appear in the town take shapes directly related to the personal fears and troubles of the protagonists and in the case of Maria, can only be explained as creations of the protagonists mind. In Silent Hill 4, the main character is jumping across a number of an undead serial killer's memories.
- With Alma being almost a copy of Alessa of Silent Hill, the last fight in FEAR 2 takes place in a Mental World, which is a bleak and chaotic as one would expect.
- Following in Silent Hill's footsteps somewhat, Alan Wake has The Dark Place.
- Yume Nikki centers on exploring the very unsettling dream world of an (apparently) very disturbed little girl.
- Ar tonelico series has the Cosmospheres which exists within every Reyvateil's mind, and the hero will do an activity called Diving inside the Reyvateil's Cosmosphere, which consists of entering these worlds to solve their inner problems and find the feelings they can use to craft more powerful song magic.
- The Cosmospheres are divided into nine levels, with even stronger songs could be crafted by diving further down the level. However, Diving into the deeper levels of the Cosmosphere (from Level 5 and beyond) would unveil the Reyvateil's true selves hidden deep in their subconsciousness. As their desires that are expressed there are unrestrained by morality which they had as their conscious selves, diving into the deeper levels poses a significant risk to the Diver.
- The second game has the Infelsphere, a dream world which can be accessed by using Soope as the pillow where one of the heroines can contact the other after the latter was absorbed into the faulty continent Gaea during the Phase II. It was later revealed that the Infelsphere's main purpose is to nurture the bonds between the two Maidens in order to be able to successfully sing Metafalica, with the Hymn Crystal for the second part of the Metafalica as the clear reward.
- The prequel series Surge Concerto also features a type of mental world called Genometrics, which exist in every single living being. Unlike the Cosmosphere, the Dive Level is an access delimiter rather than a linear progression stage. Additionally, the heroines can chain their Genometrics as the game progresses, allowing the Diver to access new worlds they can obtain a new song or Genometric Crystals from.
- In City of Villains, there are a few missions where a power psychic will send you into his mind so you can defeat his various paranoias and fears.
- Sirush's sidequest in The Reconstruction takes place in one... maybe. It could just be an example of Bad Dreams.
- The sequences from Batman: Arkham Asylum where Batman has to battle through the nightmares in his psyche created and ruled by Scarecrow.
- Implied to be the case in Twisted Metal: Black, given the impossibility of such things as No-Face and Dollface being unable to consume any food in their current states. Minion's story mode specifically says that it's all taking place inside Needles Kane's head, if you translate his Cypher Language.
- The setting of The Company of Myself exists entirely in Jack's mind, representing his murder of Kathryn. The Prequel, Fixation, zigzags it a bit; sometimes you're in a real world with a few aspects reflecting Kathryn's problems, and sometimes your in a world entirely based on Kathryn's mental state - although other characters seem to be able to interact with it as well. But the lasers don't affect them, because they're Kathryn's problems. And Jack's duplication ability - which in Company of Myself was definitely a metaphor for self-reliance - turns out to be something he can actually do.
- In the Nasuverse, this is used as a powerful rare ability called a "Reality Marble", where the user can temporarily overwrite the surrounding reality with a landscape representative of their soul/meaning. The term "Reality Marble" ("Innate Bounded Field" in Japanese) comes from a metaphor. In a bag of a hundred marbles, 99 are black and one is white. "Marble Phantasm" is the ability of spirits or elementals to work with reality such that they will always draw the white one, no matter what; "Reality Marble" is the unnatural ability to turn all the marbles white.
- Fate/stay night has this as a major plot point, as the only thing that Archer (and Shirou, by extension) truly gained in his lifetime was his Reality Marble: Unlimited Blade Works, an endless, barren landscape littered with swords. It's the basis behind all of his techniques - all of the weapons he recreates come from this world of his, which is representative of his lifelong conflict between ideal and reality.
- In Fate/Zero, Iskander, a.k.a. Alexander the Great, possesses the "shared" Reality Marble Ionioi Hetairoi ("Army of the King"), which recreates the battlefields of his past and resurrects his army, many members of which have become Epic Spirits themselves, but come at his call even after death. It is this display of kingship that finally forces Gilgamesh to recognize him as a Worthy Opponent.
- In Tsukihime, canon has it that in Yumizuka Satsuki's (nonexistent-but-eventually-will-exist) route she has her own Reality Marble representative of her continuous loss-without-gain called Depletion Garden, which sucks all the mana in the surrounding area dry (of course, it doesn't really benefit her directly).
- Other Reality Marbles include Gransurg Blackmore's Nevermore, Fina-blood Svelten's Parade, Zepia Eltnam Oberon's Night of the Blood Liar, The Forest of Einnashe, White Len's Summer Snow, Michael Roa Valdamjong's Overload, Nrvnqsr Chaos' Lair of the Beast King, Nero's Aestus Domus Aurea, Jeanne D'Arc's La Pucelle, and Nursery Rhyme's Nameless Forest.
- Also, Kagetsu Tohya for a non-Reality Marble example. That would be spoilered, considering it's part of The Reveal midstory... but it's kind of obvious.
- Zimmy from Gunnerkrigg Court has a mental world that resembles a very dark version of the city where she grew up, and is inhabited by various... things. For an extra dose of Blessed with Suck, she has little control of when she enters or leaves, whether or not she pulls other people in with her, and whether or not those things hitch a ride back out.
- Orion from Beyond Reality is in his own in the current story arc, and it looks like it may be leading to a Battle in the Center of the Mind.
- Dominic Deegan does this occasionally to confront his enemies. He has no combat experience or knows any offensive magic, but within their minds even powerful mages have few chances to beat him.
- Nenshe from Rumors of War goes on a Journey to the Center of the Mind in the fifth Story Arc, which adds a heavy dose of Mind Screw to the story. He seems locked in a "Groundhog Day" Loop (Madness Mantra?) that returns him to the same sequence of thoughts until the voices in his head (represented by his teammates) help him break free.
- 9th Elsewhere: Virtually the entire comic takes place in this type of setting, called elsewhere in-universe.
- In Shifters Ferrah ends up in her own one of these while hypnotized or dominated by a vampire's mental power. She also shows up there Naked on Arrival
- In Homestuck the Dream Bubbles are these maintained by the dead or sleeping individual whose memory it is. They can manipulate it at will, once they become aware that it is a memory. Witches and Sylphs of Space that have reached God Tier can travel to others' dream bubbles at will.
- In Three Jaguars, since the comic is about three facets of the writer/artist's personality, and their interactions it's all taking place in a mental world.
- In Ava's Demon, she gets drawn into one when she makes the pact.
- In Charby the Vampirate alps can enter them, and Kavonn likes to make his more literal than it needs to be.
- In Hero Oh Hero, Noah ends up in a few in his first chapter and later discovers his power is the ability to enter them. A representation of the person the mind belongs to retains their normal opinion of him (assuming they recognise him), but other entities match their own perceptions (e.g. in Detlef's mind, he was friendly to Noah, but his memories of Empire soldiers were demonic creatures speaking gibberish).
- In the third "Hive" story of the Whateley Universe, Hive/Samantha has one. Carmilla takes it over as a psychiatrist-slash-talk show host.
- Comedity sometimes showed the various sides of Garth's personality sitting around a conference table discussing what he should do next. It got particularly interesting when Karen fell through a plot hole *into* this mental world.
- Dept Heaven Apocrypha featured one of these during its infamous phantasmagoria event, wherein a Magic Misfire by Nessiah accidentally trapped several other students in a mental world created from his most horrific memories. Currently, Fia may have locked herself into one, but we're not sure yet.
- This is where the start of Phaeton series 3 will occur.
- The Fairly OddParents!:
- Timmy's imaginary friend Gary gets trapped in his mind when he stops believing in him. Gary seeks revenge for being unjustly imprisoned, and uses the power of Timmy's mind dimension to imprison Timmy in his old nightmares. Timmy is able to defeat Gary when he realizes that since it is his mind, he can warp reality better than Gary can, and turns the closet monster he was afraid of when he was 5 into what it really was: a green sweater. He had since learned of real things to be afraid of, and counters Gary's attacks by conjuring an image of Vicky.
- In a previous episode he travels inside Vicky and sees little people in her brain controlling her actions.
- Played with on SpongeBob SquarePants. When Squidward hypnotizes Spongebob to make him a better waiter, we see the inside of his mind looks like a newspaper office. All the employees are mini versions of Spongebob, with a green visored "editor" telling the workers that he "just got an order from the boss." Then this happens:
Editor: Hurry up! What d'you think I'm paying you for?
Worker: You don't pay me. We don't even exist. We're just a clever visual metaphor used to personify the abstract concept of thought.
Editor: One more crack like that and you're outta here!
Worker: [begging on his knees] NO, PLEASE! I HAVE THREE KIDS!
- On Pepper Ann, everyone's mind is full of robots that look and act like them. For example, Nikky's mind is organized like an enormous library card catalog. When Pepper Ann tries to cram for a trivia competition, they all go a little crazy. One gets frozen from all the iced coffee she drinks to stay awake. At the end, one of them finally gets so frustrated that it screams, "That's it, I quit!"
- American Dad!: Roger's mind consists of animals made out of TVs, tall Oreo mountains and Chocodiles that turn into party balloons.
- An early episode of Teen Titans had Beast Boy and Cyborg fall through a magic mirror of Raven's and wind up in a bizarre otherworldly landscape, which turns out to be Raven's own mind. They encounter spooky hazards and the personifications of Raven's suppressed emotions, including a depiction of her father full of foreshadowing for later seasons.
- In Danny Phantom, Danny can use his powers to enter dreams.
- The Simpsons: Homer's dreamscape includes Moe's Taverns on every street corner, skyscrapers made of Duff cans, bowling pins and food and a Homer-themed rollercoaster.
- Seen in the 90s X-Men episode "Xavier Remembers" when The Professor enters his own mind and fights the villainous Shadow King, winner-take-all—the prize is control of Charles' body. The astral plane is of the "giant space void with tiny asteroids of sanity" variety.
- Beetlejuice: Lydia enters Beetlejuice's mental world in one episode. It's very wacky!
- Lucid Dreaming could be considered a type of mental world in that the dreamer has the power to control everything like a god, without having to abide by any laws of logic because of their level of self awareness, making it less of a Dream Land, and more of a seemingly real (but completely controlled) fantasy.