"You don't get it. I built this place. Down here I make the rules. Down here I make the threats. Down here... I'm God."Those with this kind of power have their own little domain - a Pocket Dimension, a Mental World, a section of Cyber Space, or a ritually established area overlapping the normal world - where they have editing rights over the laws of reality. This is to give a character, possibly a protagonist, challenge they CAN'T solve with their fists, since the first rule such a Domain Holder usually implements is "Violence doesn't work here, sucker!". There seems to be trade-offs involved in this case, since often, one of the rules is that the Domain Holder is required to fully explain the Rules to his "guests". Subtrope (and most extreme form) of Home Field Advantage. Compare Field Power Effect and Place of Power. For large Pocket Dimensions, this may make the character a Dimension Lord. If the character has this power over dreams, it makes them a Dream Weaver. If the character's health is linked to that of the Pocket Dimension, they are a Fisher King. An already omnipotent being may be Even More Omnipotent in its home Domain.
— Trainman, The Matrix Revolutions
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Anime & Manga
- YuYu Hakusho: Some characters can establish their own rules in a defined volume of space. This is called their "territory".
- In Big Order, the protagonist can do this, imposing his rules on any area he has previously walked on.
- Beelzebub: Chapter 135 introduces a character who can do this in his 'gameroom', causing all damage dished out inside to rebound on the attacker. To get past his gameroom, they need to solve a series of puzzles, including sudoku.
- In Dragon Ball Z, Babidi's base can simulate various environments and his henchmen use it to their advantage (although it fails spectacularly when a Heavy Worlder henchman tries increased gravity against Vegeta, who regularly trains in increased gravity.)
- In Bleach, Yukio Hans Vorarlberna could put people inside video games, where he could control everything, including gravity and time. However, he was just as bound to the rules of the video game as anyone else
- One Piece, This is the essence of Trafalgar Law's Op-Op Devil Fruit ability, as it allows him to create a spherical space called "Room", where he can manipulate and modify everything inside. The concept of this power is based on the analogy of a surgeon (i.e. Law) having full control of his patients (i.e. everything) inside an operating room (i.e. the spherical space).
- The page image depicts the title character of Neil Gaiman's The Sandman in the Dreaming, exercising this ability over a demon that had just devoured him. The Dreaming is a place where dream-logic rules anyway: any insidious trap or unstoppable attack is subject to Dream's Retcon or may simply not apply to Dream. No matter how little sense it would make.
- The domains of Destiny, Death, Desire, Despair, and Delirium are all implied to work this way as well. It's one of the reasons why they're very uncomfortable with setting foot in each others' homes. For example, Delirium threatens Dream with making him unable to leave when he visits her while she's in a bad mood.
- In an issue of X-Men set during the events of Avengers vs. X-Men, Colossus is host to both the powers of The Juggernaut and a fraction of the Phoenix Force. He goes to the realm of Cyttorak, the demon that grants the Juggernaut's abilities, and demands that Cyttorak remove the Juggernaut's powers. Cyttorak refuses, since Colossus has the potential to cause more chaos and destruction than any host Cyttorak has ever given his powers to. Colossus tries to force the demon to comply, but Cyttorak is unfazed because the Phoenix Force has no power in his realm. He merely boots Colossus out. Later on, after expressing his dejection to her, his sister Illyana references this fact when she takes him to her domain of Limbo and exorcises the Juggernaut power from him. Something she could have done at any time but hadn't because she wanted to teach her brother what it's like to be helplessly manipulated by demonic forces.
- In Justice League of America, the Queen of Fables was originally trapped inside a story book, but broke free and gained the ability to travel back and forth. Inside the book, she is completely unkillable and controls all of reality.
- Dungeon Keeper Ami: All Keepers have significant advantages in their own domain. Including, but not limited to: complex traps, the corruption effect of the Dungeon Hearts, and the ability to cast magic anywhere, instantly. In addition, they basically see and know everything that happens in their own dungeon and can even press the wills of mindless animals into their service, within their zone of influence.
- In Antimony's duel of This Platinum Crown, she has absolute control over her illusionary world where she can twist perceptions of her enemies and drive them mad.
- In A Protector's Pride, Hell is the creator and ruler of the location Hell, and has complete control over anything in it.
- In The Matrix Revolutions, the Train Man has a small Matrix of his own, a train station used to smuggle renegade programs from the machine world into the Matrix. While inside it, he is basically omnipotent and can even curb-stomp Neo.
- Practitioners in Pact can claim a portion of territory as a demesne, allowing them to be this trope within its boundaries. Johannes Lillegard, a particularly powerful one, has managed, through trickery and great will, to secure one in the commercial area of the large town of Jacob's Bell, allowing him to distort the architecture so that nobody leaves if he does not wish it, and to prey upon those that inadvertently pass through it.
Live Action TV
- In Season 4 of Fringe, William Bell is trying to create his own Domain.
- In Nobilis first and second editions, Nobles with the Realm attribute can shape the reality of their Chancel. In 3e, they can get a similar effect by taking "things of the Chancel" as a Domain.
- It varies by edition and setting, but in general the gods of the various Dungeons & Dragons worlds have this privilege within their Place of Power (which could be of virtually any size.) Whether or not they have 'stats' elsewhere, it's not healthy for your 75th level archmage to decide he can simply kill one and take its place.
- Several of the darklords of Ravenloft have the power to control weather, wildlife, and other natural forces within their domains, and a few of them (Easan, Davion) can actually manipulate the fabric of their realms' reality.
- The gods of the Scarred Lands setting each have their own personal plane of existence where they can do pretty much anything. They never travel personally to Scarn, instead sending an avatar to take care of any business.
- The Planescape setting is dominated by Sigil, a city under the total (though rarely exercised) control of the Lady of Pain. She has very few rules, but violators will suffer the consequences.
- In Saints Row: The Third, Matt Miller, emo-goth-cyberpunk master hacker and boss of his own emo-goth-cyberpunk gang, the Deckers, meets the player in a duel which takes place inside the Deckers' usernet, which is actually a TRON-eque cyberspace. While you advance through the virtual reality, Miller is changing laws of physics to slow your advance and mocking you with quotes of how he controls the very fabric of this world.
- A staple in the Dragon Age series, where the Spirit World of Fade basically responds to any powerful magical being (whether a mortal mage or a demon), allowing them to shape huge domains around them over time and define their rules arbitrarily.
- Mankar Camoran has one of these in The Elder Scrolls IV: Oblivion called Paradise. It is anything but.
- Super Paper Mario has Dimentio, who has his own Pocket Dimension aptly called Dimension D. In it, he can modify anyone's strength (but accidentally empowers the player along with himself the first time around, though he claims I Meant to Do That).
- The Final Mix version of Kingdom Hearts II gives us Zexion's Absent Silhoutte / Data Replica, who can (and often does) suck the player and their party into his Tome of Eldritch Lore to transport them to a Nintendo Hard Pocket Dimension under his control. He also can't be killed there; he can only be stunned enough to force him to expel them back onto the main battlefield, where he can indeed be defeated.
- SCP - Containment Breach has SCP-106 (a.k.a. "The Old Man"), a rather sadistic Humanoid Abomination whose Intangibility not only makes him an Implacable Man, but also allows him to enter, and/or drag others into, his own personal dimension from just about anywhere. Inside, he pretty much dictates everything, including time and space — which allows him to prolong his current victim's suffering until he just gets bored with them and decides to move on to another poor schmuck.
- In the Nasuverse, some people's powers let them create Reality Marbles, which are basically Pocket Dimensions in which you can bend the laws of physics and magic, with the specifics varying for each case - Archer uses his as a source of weapons, while Nero Chaos created one inside his body, giving him Nigh-Invulnerability. Further, the Marble Phantasm power, which Arcueid has, lets her pull Domain Holder-type stunts in the real world.
- In Teen Titans, Mumbo the magician has a small Pocket Dimension inside his hat, in which he has total control of reality. He also seems to use it as a source for many of his summoning spells, implying he can "leak" its contents into the real world.
- Ghosts in GravityFalls seem basically omnipotent in whatever building they haunt.
- In My Little Pony: Friendship Is Magic, King Sombra seems to be able to manipulate the Crystal Empire's physics to his liking. First off, he's able to convert the entire place into a textbook Mordor, complete with a Lethal Lava Land-style sky. Then, when Celestia and Luna manage to invoke Sealed Evil in a Can on him, he causes the whole place to vanish as well until his return, effectively giving them a Pyrrhic Victory at best and himself a window of opportunity to just continue from where he left off. And later on, when Twilight and Spike try to find the Crystal Heart — the one thing that can stop him for sure — they discover that he preemptively converted part of the Crystal Castle into a Pocket Dimension Death Course of spiraling staircases and Black Magic traps to hide the Heart behind with.
- My Little Pony: Fiendship Is Magic and My Little Pony Friendship Is Magic IDW Issue 34 To 37 show just where he gets this from: He's actually the long-lost Dragon of a race of Eldritch Abominations called the Umbrum, themselves seemingly able to control the time and space of the very Pocket Dimension that they're currently imprisoned in.
- The Crystal Temple seems to work this way in Steven Universe, at least for some characters. Each member of the Crystal Gems has a room in the temple, and while Garnet, Amethyst, and Pearl have never been seen to alter their rooms in this manner, the room Steven inherited from Rose Quartz is basically a Holodeck that can simulate anything he wants (albeit prone to Exact Words and similar issues). A later episode reveals that Sardonyx has a similar room as long as Pearl and Garnet are fused, which she uses as a set for a mock Show Within a Show and expands one spotlight at a time to suit her needs. Unfortunately, rooms like this only last for the duration of the fusion; if they defuse while inside, it's not pretty.