Reality Marble

The concept of a Reality Marble (固有結界) is having one's inner world materialized and projected onto reality following the world egg (世界卵) magical theory. Generally, it is used to refer to the alien common sense of demons (悪魔の持つ異界常識) in that it is how demons and elementals perceive reality. It is possible for humans to achieve this as an innate Bounded Field, though generally only in the cases of the powerful beings like the Twenty Seven Dead Apostle Ancestors and the greatest of magi who have spent years upon years researching. The ability is a sub-category of Marble Phantasm, but rather than reshaping the world at their will, Reality Marbles allows only for the creation of a set world that defines the practitioner. It can be said that they can surpass Marble Phantasms, as they are capable of affecting things not of nature. It is a magecraft that comes close to being real magic, and is a category that was banned by the Association of Magecraft.

The created worlds are completely cut off from normal reality, and once activated, they bring in whomever is within range. They cannot be effected from the outside, though a large burst of mana 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. In a special case, Nero only deploys his Reality Marble inside his own body, so that he can avoid the corrective impulses of the World. 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 they cannot be freely manipulated by the caster.

List of Reality Marbles

 * Aestus Domus Aurea (Ability similar to a Reality Marble used by Saber)
 * Crimson Moon's Reality Marble
 * Crystal Valley (ORT)
 * Depletion Garden (Yumizuka Satsuki)
 * Einnashe's Reality Marble
 * Guru Guru Hisui World (Fake Reality Marble created by Hisui while under the effects of the Night of Wallachia in Melty Blood)
 * Innate Time Control (Concept with properties similar to a Reality Marble used by Emiya Kiritsugu)
 * Ionioi Hetairoi (Rider)
 * Lair of the Beast King (Nrvnqsr Chaos and Yamase Maiko)
 * La Pucelle (Joan of Arc)
 * Nameless Forest (Caster)
 * Nevermore (Gransurg Blackmore)
 * Night of Wallachia (Night of Wallachia)
 * Overload (Michael Roa Valdamjong)
 * Parade (Fina-blood Svelten)
 * The Queen's Glass Game (Relic allowing for the formation of Caster, a Reality Marble and pseudo-Servant based off the dreams of its Master)
 * Unlimited Blade Works (Emiya Shirou and Archer)