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A Bounded Field (結界, Kekkai?) is a topographic type of Magecraft that consists in knitting a network of magical energy and spreading it on base area, such as a piece of land or a building, to create a mystic boundary line that separates the inside from the outside. By definition, it should not be possible to move them once they are set. Those of Souren Araya are an exception. The most powerful type of Bounded Field makes the space itself act as a boundary line and it is on a level close to Magic.
Once constructed, the established boundary line will delimit the range of the powers of the Bounded Field, but it is possible to engrave magic sigils across the interior of the field to expand the area of effect and strengthen it. Removal of the sigil by a third party is possible as long as the technique used to engrave it isn’t too advanced. In this case, it is only possible to temporary hinder the Bounded Field by dissipating the magical energy used to activate it, but the creator of the Bounded Field can amend this by simply putting more magical energy back into it. In the Fate/stay night anime this was changed to the sigils being easily destroyed. However, new sigils are constructed by the actions of the old ones, making the Bounded Field capable of self-repair with due time.
As their original purpose was for the creation of safe havens, the effects that can be set within a Bounded Field are in their majority those whose aim is to protect the caster. Offensive variants do exist, but as they work through indirect magical interference their efficiency against those who can protect themselves magically is low.
Advanced Bounded Fields work on a subconscious level to prevent onlookers from noticing it, but placing those on a large area increase the chances of being detected by a trained magus. An ideal Bounded Field is one that cannot be detected by anybody. On the other hand, a Bounded Field that can be easily noticed is seen as the mark of a third-rate magus.
Examples of Bounded FieldsEdit
- Touko Aozaki's Bounded Field
- Emiya residence barrier
- Dead Apostle Territorial Fields
- Blood Fort Andromeda
- Breaker Gorgon
- Hounouden Rokujyuyonshou
- Invisible Air
- Rho Aias
- Rokudou Kyoukai
- Ryuudou Temple’s Barrier
- The Mist
|Bounded Field • Conceptual Weapon • Gradation Air • Magic • (Second Magic • Third Magic • Fifth Magic) • Magical Spells • Marble Phantasm • Mystic Code • Mystic Eyes • Mystic Eyes of Death Perception • Psychic • Reality Marble|
|Demons • Divine Spirit • Doll • Dragon • Familiar (Dragon Tooth Warriors) • Golem • Homunculus • Humans • Magician • Magus • Phantasmal Species • Spirits • Vampire|
|Holy Grail War|
|Command Spells • Great Grail • Heroic Spirit • Holy Grail • Master • Noble Phantasm • Parameter Rules • Servant • Servant classes • Skill|
|Church • Demon Hunter Organization • Mage's Association • The Twenty-seven Dead Apostle Ancestors|
|Akasha • Chants and Incantations • Elements • World • Magic Circuit • Magical Energy • Soul • Magic Crest|