They are Fire, Water, Earth, Wind and Void (Ether), or Water, Fire, Earth, Wood and Metal, depending on Thaumaturgical teaching. The set of Elements that, according to the teachings of Magecraft schools, are the basic substances that shapes the world. Fire is called normal and Wind is said to be noble, for example.
A Magus normally has the capacity to manipulate at least one of the Elements. However, there are cases of those who can manipulate Elements that are completely different from any of the ones specified above. Within the Mage’s Association, individuals like these tend to either very selective houses or not be part of the Association at all. Cases of a magus who possesses more than one Elemental Affinity, and even affinity to Compound Elements, are also known. Usually said individuals try to master spells that make use of more than one Element at the same time (ex: “liquid manipulation” through the use of Water and Wind Elements). Those capable of manipulating all the five Elements receive the title of Average One and are very valued by the Mage’s Association. Methods to change one’s Elemental Affinity exist, but they are very painful and dangerous.
Known Elemental Affinity by characters:
- Aozaki clan: Wind.
- Barthomeloi clan: Wind.
- Cornelius Alba: Fire.
- Kiritsugu Emiya: Fire and Earth.
- Forte: Wind.
- Kayneth Archibald El-Melloi: Wind and Water.
- Matou clan: Water.
- Sakura Matou: Imaginary Numbers, Water (as a member of the Matou clan; at birth, Sakura lacked any elemental alignments).
- Shirou Emiya: Sword.
- Michael Roa Valdamjong: Lightning.
- Rin Tohsaka: All five.
- Tokiomi Tohsaka: Fire.
Fire (火, Hi?) – Spells of the Fire element are related to consumption, heat, entropy, fuels, energy transfer and thermodynamics.
- Sub-Elements: Heat.
Earth (地, Ji?) – Earth element spells relate to grounding, cultivation of energy and energy embedding.
- Sub-Elements: Metal and Jewels.
Water (水, Mizu?) – Related to flows, forms, cycles, combinations and manipulations.
- Sub-Elements: Ice.
Wind (風, Kaze?) – Deals with air, kinetic forces, static energy, free energy and directed movement.
- Sub-Elements: Lightning.
Ether (エーテル, Ēteru?) or Void (虚, Kyo?), the Fifth Imaginary Element according to the teachings of the Mage’s Association, it combines itself with any of the other four Elements in order to actualize the mysteries of Thaumaturgy. Although amorphous and incapable of materializing by its own power, it is what allows shapeless bodies to take a material form. Before the advent of Satsuki Kurogiri’s theory on the Unified Language , it was believed that the reason why mankind was capable of performing powerful mysteries during the Age of Gods was because the positioning of the others' celestial bodies in relation to Earth made the world rich with Ether. Purest, raw form of Grain, its domains are among the lines of composition, dissolution, modification, separation, unification, spiritual bodies, conceptual weapons and others.
- Sub-Elements: Life, Holy and Eastern Divinations.
Ether Clump (エーテル塊, Ēteru Katamari?), also known as Liquid Clay, is a failed materialization attempt of Ether through the combination with one of other Elements. Under normal circumstances Ether can only be materialized after combining itself with one of the other Elements. In some cases however, mainly when there is some sort of failure from the part of the Magus, it will take the physical shape of a clay-like substance. Other than serving as a conductor of prana, it is completely useless. Whatever the shape it is given by a magus, if left inactive for long enough (i.e. without Prana running through it) it will eventually return to its original clay-like form. Known uses include True Assassin’s Zabaniya, the first suitcase puppet of Touko Aozaki, Cornelius Alba’s slime familiars and the main component forming Leysritt’s body. Somewhat related to the First Magic.
Grain (ジン, Gin?), or Space Dust. The general term given to the toxic particles overflowing in the Earth of Over Count 1999, after the world lost its capacities to sustain life. Also called “ether” because even though poisonous, it promoted the surface of mutated life forms: the A-Rays, Liners and the Ether Liners.
The rate of energy transfer within the Grain-rich atmosphere is astonishing. A factor that resulted into the arise of a new method of combat that would not be possible in the old world. In a battle between A-Rays capable of absorbing Grain and Ether Liners wielding Knight Arms made of crystallized Grain, the power of conventional weapons is rendered useless.
Supposedly, Grain is the base component of all heavenly bodies. Therefore, the closer is the connection between a life form and its mother planet the greater will be the amount of Ether in their bodies. The greatest example of this would be the Aristoteles, the supreme existence of each respective’s planets and true avatars of their will.
Its antithesis is the Black Barrel, which destroys Grain and anything containing Grain on contact.
Fifth True Theoretical ElementEdit
Fifth True Theoretical Element (第五真説要素, Dai Go Shinsetsu Yōso?), the natural enemy of the Fifth Imaginary Element (Ether), the Conceptual Weapon Longinus (Black Barrel) was made out of this unnamed substance.
The Sixth Imaginary Element (第六架空要素, Dai Roku Kakū Yōso?), also known as Demons, is a force, that reacts to the desires of humans for a wish. It needs a form, invented by humans, similarly to how it happens to higher-level spirits, inorder to materialize itself, as a passive existence. This passive existence is an individual demon and not a true demon.
But regardless of the result, as a rule, demons are gentle. They are the Imaginary Element that understands one's pain and attempts to remove it. Depending on perspective, one can say that they are allies to humans. The natural ability of an imaginary demon is a Reality Marble (固有結界, koyuu kekkai?, innate bounded field) and at the same time it is the alien common sense of demons (悪魔の持つ異界常識, akuma no motsu ikai joushiki?).
The Sixth Imaginary Element is responsible for the materialization of wishes, the phenomena of possessions, human demonization, and spiritual mediums. The Mystic Eyes of the goddess Medusa are made out of this. And Avenger is a case of human demonization by other humans while Kiara Sessyoin cease being human and end up being categorized as a demon by her own doing.
Hollow (虚数, Kyosū?), or Imaginary Numbers is Sakura Matou’s unique Elemental Affinity and Sorcery Trait. A power highly effective against spiritual beings, but not so potent against those whose body is not made out of Ether. When the Matou clan restraining spells are used along with this, it is possible to imprison and skewer the target into a separate dimension composed entirely of shadows. Furthermore, when Angra Mainyu power is imbued on Sakura she is able to use this ability even against normal humans.
- ↑ 1.0 1.1
 Fate/complete material III: World Material - Theory of Magic - Magecraft: Magus, p.041
Magic circuits are the pseudo nerves that a magus has inside himself. These are paths that generate magic energy and access the magic foundation engraved in the world. Magi make magic energy with the magic circuits and use the magic energy to run the magic foundation and thus put magery into effect. To do either of these, the magic circuits are necessary.
As suggested by the description pseudo nerves, these are split into cores and lines joining these together and are spread throughout the body.
The number of magic circuits are fixed at birth and the number won't increase by other than external factors.
The product of stamping the anchored mystery that a magus had spent his entire life building up. Can be said to be mystical inheritance that defines the magus line as a magus line. While the inheritor is young, it is necessary to implant this little at a time while at the same time having the body adjust to the magic crest by medicine and rituals. The magic association also has technology for extracting just the magic crest from the body and storing it.
What determines what kind of attributes a magus' magic is going to be likely to have, or what kind of magic the magus is going to have good chemistry with, is going to be the element aligned with the magus.
In addition to the five great elements of earth, water, fire, wind, and sky, there's the imaginary elements of Hollow and Nothing, for a number of seven.
Some of the five elements will differ according to the school of magic. A famous one is a style in which the five great elements are formed from wood, fire, soil, metal,and water.
Basically, one magus has one alignment, but sometimes there are magi with two alignments (like fire and earth, wind and water) and there are also those called "Average Ones" who have all the five great elements.
Matou Sakura normally would have been a holder of the imaginary element of Emptiness. However, through her magic training, hers had been changed to the water alignment of the Matou line, so she couldn't exhibit her true talent.
Five great elements Earth One of the two alignments of Kiritsugu. Kiritsugu exhibited his attribute of combining and used magic which combined the wounds of an enemy in a different form than normal, and made them unhealable.
Five great elements Water The alignment that the Matou magi have had for generations. Matou exhibit the attribute of absorption and have passed it on. Sakura's alignment changed from Emptiness to water.
Five great elements Fire The alignment of Tokiomi and also one of the two alignments of Kiritsugu. It is the symbol of life and death and has good chemistry with destructive magic.
Five great elements Wind One of the two alignments of Kayneth Elmelloi Archibold. There are few magi with wind as an alignment
Five great elements Sky An element which makes up celestial bodies that is newly added as a fifth element to the four great elements of earth, water, fire, and wind. This is, in other words, Ether.
Imaginary Elements Hollow The alignment that Sakura was born with. Defined, in magery, as that "which is possible but is not in the physical plane". Also called imaginary numbers.
Imaginary Elements Nothingness Like Hollow, the alignment of an imaginary element. In magery, defined as that "which is not possible, but materializes". Has a different meaning that the "nothing" of physics and math.
•The absoluteness called Origin
If alignment determines the root of one's magic, then even deeper than that, is the origin which determined the root of one's existence. The origin is not only for magi, but is the orientation that all things are born with and it's existence itself is thought absolutely necessary.
Those magi with an origin that is strongly expressed outwardly are sometimes removed from the normal alignments and there are times that the origin itself becomes the alignment. Most of those magi exhibit their talents as extreme specialists.
Because of that, it's said that they can reach higher grounds than normal magi.
Of the alignments, wind is called "noble" and fire is "normal". By the way, the term "Noble Colors" is used to refer to special and innate things where he workings of the magic circuit are close to the movements of a celestial body (normally they're closer to the movements of the crust), and is innate and special.
Noble Colors are often used to refer to mystic eyes, and Rider's petrifying mystic eyes are also a noble color.
Fate/Zero - Volume 4, Act 12, Part 3
One of them [Rin] has all elements, having five multiple elements as her alignment. The other [Sakura] has no elemental alignments, having Imaginary Numbers only. Both sisters have a rare potential that can be equated to miracles.
- ↑ 3.0 3.1
 Kara no Kyoukai Special Pamphlet - Encyclopedia: Ether lump [Others] English | Japanese
Ether lump [Others]
Ether, the Fifth Imaginary Substance as coined by the Association. It is a necessary medium that gives shape by mixing with the Four Elements.
It is shapeless, but it is a critical element in the functioning of magecraft.
Ether is bound to become one of Earth, Water, Fire and Wind, but in the hands of a novice, it would fail to become one of the Four Elements and materialize. This is ether lump.
Ether lump is completely useless. In some sense, creating ether lump is analogous to creating "Nothingness". Looking at it from this perspective makes it sound like "True Magic" In fact, ether lump is originally the First Magic's ----------
|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 • Dragon • Familiar • Homunculus • Humans • Phantasmal Species • Spirits • Vampire|
|Holy Grail War|
|Command Spells • Great Grail • Heroic Spirit • Holy Grail • Master • Noble Phantasm • Servant • Servant classes • Servant Parameters|
|Barthomeloi Lorelei • Magician • Magus • Sealing Designation|
|Akasha • Chants and Incantations • Elements • World • Magic Circuit • Prana • Soul • Magic Crest|