Reality Marble

The concept of a is one that centres around the materialization and projection of one's inner world onto reality following the Thaumaturgical Theory . 
Originally, it was an ability specifically had by Daemons as their , but has since come to include the unique Bounded Fields possessed by many people, such as The Twenty-seven Dead Apostle Ancestors (Remake) and the greatest of magi who have made this ability available to use through a long time. As such, Reality Marbles represent the pinnacle of all Bounded Fields where the boundary line becomes the space itself. 
==Characteristics==
Koyanskaya's World Egg.png|Tamamo Vitch Koyanskaya's World Egg.
World Egg of Camus' Dream World.png|World Egg of Camus Peligor' Dream World.
The created worlds are completely cut off from normal reality, projecting their internal landscape and sealing off the regular World. Following the World Egg Thaumaturgical Theory,Fate/stay night- Heaven's Feel route - Day 15: limited. - Nine Bullet RevolverMelty Blood Actress Again Current Code - Ciel's scenario - Stage 9: Dust of Osiris the actualization of a Reality Marble is the result of switching the Self and the World while keeping the boundary the same. The size of the Self and the World is switched, enclosing the World in a small container while the Self is expanded. The contained World is the World Egg and the name of the theory. The reason it is called World Egg Thaumaturgical Theory is because, in Alchemy, an egg is considered to be the hidden meaning of the world as well as the soul.Lord El-Melloi II's Case Files {Rail Zeppelin} Grace note - Special Episode: "Waver, Reunion, and the Magic Lantern"
They will encase anyone within range, causing them to disappear from view. Magi are still able to feel the presence of the Bounded Field, and while they cannot be directly affected from the outside, a large burst of mana, such as Excalibur, may be able to disrupt them. 
The World constantly attempts to crush the unnatural Bounded Fields as they are not created by spiritual beings, meaning that it costs a great deal of magical energy to construct one and keep it stabilized. This generally only allows them to be used for a few minutes, but given their powerful nature, that is likely enough time to properly utilize them; even the strongest Dead Apostle cannot maintain a Reality Marble for more than a single night.Melty Blood Block D: 3/Fierce Heat, With Scattered Lies - Alice's Anxiety 
Each world has its own set of patterns and rules, which can be said to be an invasion of reality by the diagram inscribed on the soul, and as it is just one aspect put into form, the user cannot add their own will into the form of the barrier.
Nrvnqsr.png|thumb|Nrvnqsr Chaos using his Reality Marble on his own body.
UBWblades.jpg|thumb|Swords knitting Shirou's wounds.
blades.jpg|thumb|Unlimited Blade Works replacing parts of Shirou's breaking down body with numerous blades.
The practitioners can also make use of certain aspects of their Reality Marbles without activating them. Unlimited Blade Works is responsible for the Projection and Reinforcement abilities of its practitioners, and Iskandar is able to summon a single soldier from Ionioi Hetairoi at any time without bringing about the corrective impulses of the World. Some can be activated inside the body of the user, such as Unlimited Blade Works going out of control and creating swords inside of Shirou Emiya, and in a special case, Nrvnqsr Chaos only deploys his Reality Marble inside his own body, which allows him to avoid the corrective impulses of the World.
It is the closest magecraft to real Magics, a taboo among taboos, Mystery among Mysteries and one of the pinnacles for magi, so researches on it have been banned by the Mage's Association.
 That said, Reality Marbles are also considered magecraft, a series of taken tricks to deceive the world, taken to its logical extreme.The Adventures of Lord El-Melloi II Volume 2: The Devil of the Wandering Sea (Upper) - Chapter 2 But obtaining a Reality Marble is not something every Magus can achieve through research. Even Medea, far above all modern magi, can only construct "another world" of the same scale with enough time and expenses instead of a Reality Marble.
In the case of Servants utilizing a Reality Marble, it will generally be limited to the Caster class due to the spell's nature as grand magecraft, but there are exceptions like Iskandar. Those of the Berserker class will likely never be able to utilize them, meaning that most who use them will be powerful magi with low combat abilities.
Reality Marbles and Marble Phantasm are both ways to create another world, but Reality Marbles turn everything into their own world that even its users cannot change, whereas Marble Phantasm manipulates only natural things as its users want. In other words, both ways have good and bad points. Areas filled with grudges and remnants of strong regrets are like Reality Marbles to Spirits.Fate/stay night Prologue - Day 2
===Overlapping Reality Marbles===
In the case of the deployment of two Reality Marbles at the same time, one Reality Marble having a higher output will render the one with the lower output unusable. If two Reality Marbles of equal output are deployed at the same time, both will manifest and resist each other. As Reality Marbles do not move from the position in which they are deployed or move with the user, the two users will need to decide whether to try to draw in the opponent into their Reality Marble, step into the opponent's Reality Marble, or stalemate until both Reality Marbles run out of magical energy.
In the case of EMIYA vs Shirou Emiya, each possessing the same Reality Marble Unlimited Blade Works, Shirou shows the ability to manifest his own version of Unlimited Blade Works within EMIYA's, spreading its influence while running towards EMIYA.Fate/stay night: Unlimited Blade Works - Episode 21 In the case of Shirou vs Ziz, Unlimited Blade Works' terrain completely replaces the stagnating darkness of Ziz's Astral Infant, but Ziz was still able to deploy astral swordsmen created by his Reality Marble. Despite Unlimited Blade Works holding off Astral Infant, El-Melloi II reasoned that Astral Infant would eventually win out.The Adventures of Lord El-Melloi II Volume 8: Fem's Casa (Lower) - Chapter 8
Within SE.RA.PH of the Moon Cell, all areas are manifested as Reality Marbles, and they can be overwritten by those of Servants. Within Fate/EXTRA CCC, EMIYA's Unlimited Blade Works can be overwritten by No Name's own Unlimited Blade Works, Tamamo-no-Mae's Eightfold Blessing of Amaterasu, and Nero Claudius's Aestus Domus Aurea. It is unknown if this reflects an actual occurrence or if it is limited to a gameplay feature.
===Inheritance===
Toraburu Hanafuda Travel Journal states that it is possible for a Reality Marble to be inherited. The Reality Marble of Nrvnqsr Chaos was taken by Maiko Yamase upon her consciousness emerging after Nrvnqsr's death.Kagetsu Tohya - Dawn The Time Manipulation magecraft passed down in the Emiya family is a type of Reality Marble that may correspond to this.
==List of known Reality Marbles==
Reality Marble 	User 	Effect
Airavata King Size 	Kingprotea 	Noble Phantasm where the user is able to return to full size after the corrective pressures of the material world are temporarily removed.
Ars Paulina 	Solomon 	Death in this space does not "count" in reality, so it is possible to revive those who die in this space with enough magical energy.
Solomon 	Goetia 	Singularity created by Grand Caster using Ars Paulina as a basis.
Alf Layla wa-Layla 	Scheherazade 	Summons and gives form to characters, tools, spirits, and so forth that appeared within .
Astral Infant 	Ziz 	Causes Ziz's body to become made of light and lets him create astral swordsmen also made of light to fight for him. Has the ability to create a new planet under the right conditions. He discarded his body long ago and uses his Reality Marble as his current body.
Bizarre Reality Marble: Red Hood 	Beryl Gut 	Unknown.
Chariot My Love 	Medb 	Reality Marble within the interior of her Noble Phantasm, captures the target within.
Cursed Cupid Cleanser 	BB 	Draws out the power of the Moon Cell, to transform into an invincible nurse.
De Sterrennacht 	Van Gogh 	Noble Phantasm given form to a Reality Marble and eroding reality.
Dead End Catharsis 	Gen Urobuchi 	Lowers the Luck of all characters in his stories by one rank.
Depletion Garden 	Satsuki Yumizuka (Remake) 	Removes mana from the surrounding area, most effective against spiritual beings and magi.
Dimension of Steam 	Charles Babbage 	Allows for the creation of various smaller machines, dubbed "Helter Skelters" modeled after Babbage's armor.
Emotional Engine - Full Drive 	Sei Shounagon 	Noble Phantasm that is the materialization of the world she created within "The Pillow Book" brought into reality. The souls of enemies that become trapped within the Reality Marble will slowly be eaten away at.
End Sacrifice‎‎ 	First Lady 	The central location of the event Prisma Causeway where Magical Girls from different Parallel Worlds waged war against each other.
Golem Keter Malkuth/Eden 	Avicebron 	An autonomous Reality Marble that has the ability to continually repaint the world into "Eden" for as long as he exists.
Guru Guru Hisui World 	Hisui 	Fake Reality Marble created by Hisui while under the effects of the Reality Marble of Night of Wallachia in Melty Blood.
Ionioi Hetairoi 	Iskandar and Iskandar's Shadow 	Noble Phantasm that summons the army that served him in life, each soldier sharing some burden of the Reality Marble.
La Pucelle 	Jeanne d'Arc 	A crystallized Conceptual Weapon that acts as an offensive interpretation of her burning at the stake, in the form of an inner landscape crystalized in the form of her Sword of St. Catherine.
Lair of the Beast King 	Nrvnqsr Chaos and Maiko Yamase 	Allows the user to absorb and merge their existence with the lives of other creatures and manipulate them in the form of chaos.
Magical Star of Dreams 	Magical Ruby 	The internal world of the Kaleidostick described as "the highest peak for those who love justice". Can only be entered by those that resonate with certain values possessed by Ruby herself.Fate/hollow ataraxia - 10/09 - Streets - Mimic Rin/Tohsaka Lvl 3
Metabole Piglets 	Circe 	A Reality Marble of summoning that turns foes into pigs.
Nevermore 	Gransurg Blackmore 	Covers the sky with a canopy of "death wings" that produce a "world of death" where absolute darkness swallows the light of the Moon and stars.
Neverland Overdrive 	Kinoko Nasu 	A world where he can play games forever without aging.
Nursery Rhyme 	Nursery Rhyme 	A relic allowing for the formation of Nursery Rhyme, a Reality Marble and Pseudo-Servant based off the dreams of its Master.
Nameless Forest 	Nursery Rhyme 	Slowly chips away at the target's ego in an order by influencing their unconscious mind to cause them to disappear.
Papiyas 	Oda Nobunaga 	Noble Phantasm that makes her into a being that "holds absolute power against those with Divinity and Mystery."
Parade 	Fina-blood Svelten 	Unknown.
Puppet Playground 	Hieda-no-Are 	Nullifies Mystery based on his work as the Recorder of real-life history and the writer of the history book, , therefore any legends and folktales with elements of Mystery to them are rejected.
Shimabara Hell 	Avenger Amakusa Shirou Tokisada 	Remnants of the pruned worldine of Amakusa etched upon his soul, filled with toxic air that is inimical to all life.
SE.RA.PH 	Moon Cell 	System of the Moon Cell that generates a number of different Reality Marbles to function as the basis for the Moon Holy Grail War of Fate/EXTRA.
Seven Duels of Swordbeauties 	Summer Lion King 	An ability that manifests a battleground capable of blocking all forms of outside communication.
TATARI 	Night of Wallachia and Dust of Osiris 	Allows the materialization of the rumors and fears of a region into physical entities.
Tunguska Special Territory 	Tamamo Vitch Koyanskaya 	A Reality Marble manifested upon the blank world in a similar manner to a Singularity or Lostbelt. The entire special domain including the shell is Koyanskaya herself. Her Saint Graph is expanding endlessly and enshrines herself within the old Tunguska forest region.
Tiger Magic Square 	Taiga Fujimura in Toraburu Hanafuda Travel Journal	Unknown.
Overload 	Michael Roa Valdamjong (Remake) 	Applies the effect of the Square spell to all of his spells while it is activated.
Unlimited Blade Works 	Shirou Emiya (Fate/kaleid) and EMIYA (EXTRA) 	A high-class Thaumaturgy that embodies their internal worlds as a steel manufacturing factory that produces the countless famous Swords that are without their owners, extending into the horizon.
Unlimited Lost Works 	EMIYA (Alter) 	A minuscule Reality Marble that comprised of those weapons he witnessed that bore the concept of Sword, aggregated in their entirety—is made to manifest within the opponent's flesh by certain means.
Originless Creation of Swords 	Senji Muramasa 	A Noble Phantasm that creates the ultimate katana Tsumukari Muramasa.
Paradis Château d'If: O' You, Conquer the Brilliance Road	Edmond Dantès/Le Comte de Monte Cristo 	By entering the spirit of a target within range, seizing, eroding, and assimilating the spirit of the target, it constructs a subspecies Reality Marble to put the soul and spirit of the target to the test.
Unknown 	Crimson Moon 	Contains Millennium Castle Brunestud, which can also be manifested with Marble Phantasm.
Unknown 	Einnashe 	Allows for the manipulation of memories.
==List of known abilities similar to Reality Marbles==
Ability 	User 	Effect
Aestus Domus Aurea 	Nero Claudius Caesar 	Ability similar to a Reality Marble used by Nero Claudius.
Black Land 	Dust of Osiris 	Arcueid Brunestud's Marble Phantasm extracted and made into a World Egg by Dust of Osiris.
Crystal Valley 	ORT 	Ability similar to a Reality Marble used to passively transform the area around it into an alien crystalline substance.
Chaos Labyrinthos 	Asterios 	An embodiment of the maze where The Minotauros was confined. A grand magecraft almost equal to a Reality Marble, it is built in the underside of the world.
The Duel Field created by Diatrekhōn Astēr Lonkhē	Achilles 	A separate dimension outside of time that is comparable to a Reality Marble used by Rider of Red.
Field of True Summer Snow 	White Len 	Area generated that is similar in nature to a Reality Marble.
Hounouden Rokujyuyonshou 	Souren Araya 	Bounded Field that is not a Reality Marble, but rather something that can be called an embodiment of Souren Araya's internal world.
Principles 	The Twenty-seven Dead Apostle Ancestors/Remake	Principles are the seeds of textural rules, or World Eggs, as they're known in magecraft theory. Principles do not simply grant transcendental abilities, instead manifesting uniquely based on the possessor’s characteristics.
Lord Hachitendo of Hakuro Castle's Hundred Demons	Osakabehime 	A grand magecraft that materializes a miniature replica of Himeji Castle, along with its so-called “barrier” Reality Marble used by Osakabehime.
Red Cliff Calamity - Cradle of Fire 	Zhou Yu 	Similar to a Reality Marble, powerful magecraft is utilized to change the surroundings into blazing ships. It creates hell on earth, raining down fire and explosions until either the enemy's life or the user's magical energy burns out.
Reverse Side of the World 	World 	Da Vinci compares it as being the Reality Marble of the planet itself. As the planet is big, it has more that one "mental characteristic", such as "a mind closely adjoined to human society" or "a mind that takes issue with human society". Avalon would be one of such characteristic, a world closer to nature and which doesn't concern itself with human society.
Time Manipulation 	Emiya family and Kiritsugu Emiya 	Concept with properties similar to a Reality Marble used by the Emiya family and Kiritsugu Emiya.
Transcendent Dazzling Castle of the Sun 	Toyotomi Hideyoshi 	A fortress similar in nature to a Reality Marble used by Toyotomi Hideyoshi.
Ramesseum Tentyris 	Ozymandias 	The manifestation of how the glorious Pharaoh contains within his body the various Egyptian gods, thus it contains a number of mystics. A large temple complex that consists of several and more “bodies of temple complexes composed out of several temples”, as well as many great temples and mausoleums, which cannot exists in reality. It is both similar to and a kind of Reality Marble.
Unnamed spell 	The Seven Heroic Spirit Swordmasters 	A spell similar to a Reality Marble of a field of corpses where the loser's soul will be consumed.
Lai Rhyme Goodfellow 	Oberon 	A grand magecraft that is not unlike a Reality Marble used by Faerie King.
Imaginary Earth: Social Plan World 	Medea 	An ultimate Bounded Field created by Caster, it acts as "another world" on the same scale as a Reality Marble.
==References==
it:Spazio di singolarità
vi:Cố Hữu Kết Giới
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Category:Terminology in Tsukihime
Category:Magecraft terminology
Category:Terminology in Fate/Grand Order
Category:Terminology in Fate/Zero
Category:Terminology in Fate/stay night
Category:Terminology in Fate/Apocrypha
Category:Terminology in Fate/EX
Category:Bounded Fields
Category:Magecraft
Category:Effects on the level of Magic