The Mystic Eyes of Death Perception (直死の魔眼, Chokushi no Magan?, Mystic Eyes of Direct Death) are a type of Mystic Eyes that are considered to be such a rarity that they are thought not to exist at all. They are possessed by Shiki Tohno and Shiki Ryougi, and Michael Roa Valdamjong in the body of SHIKI Tohno displays a similar ability.
The Mystic Eyes of Death Perception can be called a circuit that opens up in the brain and eyes to allow the user to "perceive death," the conceptual "Death of an Existence," as visual signals in the form of Lines of Death (死の線, Shi no Sen?) and Points of Death (死の点, Shi no Ten?). Although Shiki Ryougi only sees the Lines of Death, certain Lines act as the Points of Death that Shiki Tohno would see. Their usage is not entirely dependent on the eyes of the user, as they can still "see" lines should they go blind or gouge them out. Rather than "seeing," it is more like they are "observing" everything at a higher level. "Death" is invisible to normal people, only accessed through perceiving the natural flaws with overly strong spiritual sight by looking through channels that normal people cannot perceive. In perceiving death, it can be said they see the Root itself. They are similar to the eyes possessed by the Celtic god, Balor, which were able to actualize death simply by looking, and they have not been possessed by anyone else since then.
The ability to perceive the death of a being or object depends entirely upon the user's perception of death. The brain and the Mystic Eyes work as a set, so having different "specs" allows for great differences in the users' abilities to perceive death. They show the death of things, the weak points where everything is most easily broken and the imperfection in everything that will break down one day. They can be said to see the fate of all things, seeing the future, allowing them to see death. While there is a difference as to when an person or object will "end," it is certain that they will all arrive at that point because death is not something that "arrives," but rather is something already contained within an object at its creation and certainly bound to happen as part of the principle of causality.
Anything with an origin must have an end, a "time of death" determined at the beginning, and as it already exists, it is not impossible to comprehend such a concept with the appropriate circuit in the eyes and brain, allowing them to be viewed as though a microscope. It is normal that cutting a living being's neck would kill them, their life stopping because it was cut, and conversely not being able to cut a being's neck would mean that they will not die. The eyes can ignore the cause, instead allowing them to kill even that which is immune to all external effects. That which is cut falls apart and that which is "killed" becomes "dead," but rather than "tracing the lines causing the object to fall apart" and the object becoming dead because it was cut, it is "ending the lifespan and killing the object." It is the erasure of existence rather than physical destruction, so the object is "stopped" and the cut is the end result.
While Tohno's eyes are normally gray, they glow with blue while utilizing the Mystic Eyes of Death Perception after removing his Mystic Eye Killers. Ryougi Shiki is able to shift her focal point to prevent herself from seeing the lines of death, returning her eyes to their regular appearance. Looking at the world as she normally would activates her Mystic Eyes of Death Perception, granting them a blue hue. 
Death emerges to the surface of an existence as lines, and cutting along them will result in "Death", regardless of the constitution or properties of the object. They have no particular structure, so the can be described as solid, black "zigzagging scribbles" all over the world, even within the air itself, that look like cracks. They are harder to see during the day due to the light, but emit a sort of glow at night. The lines of a living organism will keep changing position as long as it is alive, and those Ryougi perceives are constantly moving and irregular. They can be traced with any sort of object, effectively "breaking" the person or object along the line, cleanly cutting it without any need for force. The object tracing the lines "sinks into it", and although a finger will fit into the thicker parts, thinner objects like rulers or knives are more effective. Tohno does not attempt to actually trace lines with his fingers, and Ryougi breaks her finger while tracing along the line of a corpse possessed by a Wraith. While anything can be cut, the user has no say in where they can cut, as it depends on the placement of the lines.
Arcueid Brunestud theorizes that the lines are something like the weakest parts of the joints between molecules in an object or a predesignated switch within the genetic makeup that activates the death of the object. Those of Tohno are described as "lines where the substance breaks easily", while those of Ryougi are described as the "the concept of longevity given form" rather than lines at which "an object can be easily cut apart." Completing a cut makes it impossible to heal under normal circumstances, but Arcueid does manage to heal from a partial cut. The lines that are cut cause the corresponding part to die, making them never able to move again even if the main body is alive. While Nrvnqsr Chaos normally just reforms his body from his chaos, he cannot regenerate his arm after Tohno cuts it off. While Arcueid is cut into numerous pieces from having her lines traced, she manages to regenerate by completely reinventing the conceptual structure of her body, abandoning the conceptual structure that had been traced. Ryougi cuts off her own arm, but it is able to be replaced by a puppet arm.
Beings will have different amounts of lines depending on their complexity. Humans will have a countable amount in geometric patterns. The Dead have numerous lines all over their bodies that make their appearance hard to discern. Members of the Phantasmal Species will have very few "parts vulnerable to death." Those without physical bodies like Servants are also able to be killed.
Points of Death are from where all lines seem to flow, resembling blood vessels. There can be a number of them on an object, and, whereas the lines are "where things die easily", the points are "death itself." The eyes do not actually kill "the body", as the power of killing someone's life is very common in the world. The "points" seen by the eyes end the very meaning, the "existence", of whatever is "killed." The destruction, the extinguishing of life that comes afterward, is only a side effect of destroying their existence. Striking the point makes the entity completely cease to function. What "makes a living person a living person" or what "makes a hallway a hallway" is ended in the simplest way, unraveling its existence and making it no more. This makes it possible to kill the soul without harming the body, allowing for the destruction of one of two souls in a single body without the death of the other soul or the body itself. The weaker soul is the one that will be ended, so it is a battle of strength in that case.
Points can be pierced by sharp objects. Piercing a point effectively “erases” that object from existence, causing the entity to completely cease in function. It can stop certain inherent properties such as momentum, toxicity, and generally any effect it may impose on it's surrounding. Disease, poison, and corruption like that of being turned into a Dead Apostle can be completely negated. Living things whose point was pierced get “stopped” and, as a consequence, die. Those who have accumulated an exceptionally large weight of existence take longer to die because there is more of their existence that needs to unravel. It is absolutely permanent, and can't be reversed or bypassed, even by Michael Roa Valdamjong's system that allowed him to be reincarnated seventeen times over eight hundred years.
The ability to kill something with the eyes requires the user to actually strike the target, so those physically above the user will easily be able to avoid them with little worry. While Tohno kills Arcueid at her full available power with a perfect sneak attack, she would be able to easily avoid him if he were to actively attack her even in her drastically weakened state. There are also existences that are hard or impossible to kill due to their nature. Souren Araya's Sarira cannot be killed normally because it belonged to an enlightened one who achieved "becoming extinguished, alive." While it would be possible to see its lines of death, it would mean deciphering "advanced lines of death" levels higher than the normal concept of death.
There are those without true form like Night of Wallachia right before it takes shape. Something "made of words" and "which has yet to exist" cannot be "killed." Wallachia also can be called a "phenomenon" like "wind storms" and "typhoons", and while individual events of such phenomenon can be dispersed, it is impossible to outright kill the phenomenon itself. Ryougi works off of the notion of killing what she perceives as alive, so while she claims to be able to kill God "as long as it's alive", she can do nothing to God because "God isn't alive or dead."
There are also those who lack an actual death, such as True Ancestors during the night, especially under the full moon. While lines and points can be seen on True Ancestors during the daytime, they are too close to being "perfect life" during the night that they don't even carry the concept of death. After she has "lost her immortality" due to being killed, Tohno can see thin lines on Arcueid during the night. Through enough strain, Tohno is able to see a single line while after she has recovered somewhat, and cutting her off from nature allows for him to see even more. Against Archetype: Earth, Ryougi cannot see her death, and she goes as far to say that she doesn't have a death at all. Beings like Type Mercury and other Ultimate Ones lack the concept of death entirely, so the ability will not affect them under any circumstance.
Mystic Eyes of Death Perception are a hybrid power, taking aspects of both Mystic Eyes and Pure Eyes, but they are classified as ESP. They are acquired through a near-death experience, gained by being immersed in "death." However, simply going through a near-death experience is not enough for their acquisition, as Roa fails to acquire them even after numerous deaths and reincarnations. Their frequency is so rare that they are thought of as nothing more than a myth even by beings like True Ancestors. Simply encountering them makes Arcueid Brunestud call Shiki Tohno a monster due to their unique attributes not found even among the most powerful creatures on the planet. While the user can still perceive death without the eyes, Touko Aozaki would still pay any price to obtain them. The eyes can be thought of as more special than those possessed by any other user of supernatural power in the world, eyes that can kill anything just like death itself.
Tohno acquired the eyes after being essentially killed by SHIKI Tohno and immediately sustained by Akiha Tohno's life force. Ryougi acquired the eyes after a two year coma left her in contact with the Root for a prolonged amount of time due to being hit by a car and the death of her male personality. Arcueid believes Tohno had a natural affinity beforehand, and as part of her third personality's abilities, Ryougi's body already had the ability to see them. The ability was simply brought to the forefront and awakened by the accident.
The eyes of Tohno, Ryougi, and SHIKI have difference usages and limitations.
Shiki Tohno specializes in killing living things. Unlike Ryougi, he is not suited in the aspect of recognizing "concepts" because he was only "submerged in death". He can perceive the death of concrete physical existences, allowing him to kill people, animals, locks, walls, and even part of the planet itself in the form of killing "nature" in a specific area. He cannot see lines on things that are unable to be killed or destroyed in the current world because the standard for Shiki, as a human, is based on the limits of the people of his era.
He has a great deal of mental strain when utilizing his ability. Due to performing the normally impossible process of his brain classifying the death of non-living objects, it overloads his brain because "seeing" requires "comprehending." His brain must open its circuits from the classification of living things to the classification of non-living things to see the death of non-living objects. He, as a living being, cannot comprehend the death of inanimate objects, so he must connect to a circuit with the same orientation as them. He will be fine as long as he only perceives what he brain allows him to perceive. Overuse of trying to perceive the death of what his brain will not allow him to normally perceive will eventually overstrain it, causing the blood vessels in his brain to burst and end his life. Overuse without going over his limit can lead to extreme headaches and even temporary loss of sight.
Beings do not have to have "life" in order to be "killed", so even The Dead without life can be slain. He can stop anything that can move and break without exception. While he cannot normally kill concepts, he can see certain things like Akiha Tohno's Caging Hair due to the Mystic Eyes' second nature as Pure Eyes. He has a hard time perceiving the death of Nrvnqsr Chaos, as he can only see the individual points of death for his beasts. He realizes he would have to kill each individual point in order to end him, but eventually manages to see an "Ultimate Point" below all the others deep in the center of Nrvnqsr's being.
Shiki's ability is constantly developing, and he becomes more in-tune with death the more he utilizes it, bringing himself even closer to death as well. He originally can not see the "points", but starts seeing them more and more after his encounter with Arcueid. He can initially only see the points on living things, while all other objects only have lines. He begins to see points on them with great strain, causing him to pass out, but eventually becomes accustomed to them as well. He will see the lines even if he does not will himself to, but to see the point from where the lines flow, he needs extreme concentration. He utilizes Mystic Eye Killers, glasses made by Touko Aozaki and reinforced by Aoko Aozaki, to keep them from being active, but there are times when even they are not enough to keep him from seeing the lines as he uses them more often. They eventually become unable to completely suppress the eyes, so he instead always keeps them covered with bandages by the time of Talk..
Shiki Ryougi specializes in killing concepts and visualizing "events" that stem directly from the Root. She is a Mystic Eyes of Death Perception user several ranks above Tohno. She is able to perceive the death of mostly anything, though it is limited to what she perceives as "alive." Something like a telephone is seen as "being alive because it's not broken", so she will not see lines on a broken telephone because she feels that it is "already dead." The notion only refers to her perception of "living" rather than if it has "life", so Kirie Fujou's ghosts can be killed even though they are "dead" because they are "living" in the sense that they can interfere with the current world.
Differing from Tohno, she doesn't show any noticeable strain, allowing her to actively utilize them as much as she wishes. She can kill things with form like people, objects, and spiritual bodies, and she can kill concepts without life or form like diseases, ESP, magecraft, Bounded Fields, or anything else of the sort. She is even able to kill the "future" predicted by Mitsuru Kamekura, causing his clear vision of it to be bisected and disappear. The reason is that it was not a prediction, which she would not have been able to see, but a clear calculation exceeding prediction. Coincidence cannot be reached out to, but it is possible to reach out to a certainty. The future is normally invincible because it is uncertain, but giving it clear form allows it to break. That which is determined is no longer the unknown, so it having form allows for the concept of death to be applied to it. It is a clearer "killable" target to her than Fujino Asagami's ESP.
As a living being, she has an easier time seeing the end of another living being, as it is easier to comprehend "the death of a living being." Seeing Lines of Death on minerals or concepts requires her to become minerals or use her brain and tap into her "imagination." She does show some mental strain while trying to perceive death on Souren Araya due to his Origin and the Sarira in his arm, but he believes she would overcome even those with time. The initial lines are faint, and he has a line spiraling at a single point on his chest that looks like a hole. He notes that she can cut off the root of motion on anything alive or dead as long as it has that motion. Even he, who is a stopped organism, must have a thread that permits his existence as long as he actually continues to exist, and he believes that even the unique exception of the Sarira cannot be hidden from her forever.
Those possessed by Michael Roa Valdamjong in the body of SHIKI Tohno cannot be called true Mystic Eyes of Death Perception. They can be called similar and completely different at the same time. While he can see the same lines and similar points, he can only view the "life force" in living beings. He is not seeing their death, and he also cannot see the death of inanimate objects. They are limited to directly damaging or annihilate someone's life force, the "place indicating the source of life" and the "part which keeps things alive." They do not kill outright by actualizing death, but instead inflict critical damage on someone's life force that leads to their death.
- ↑ Tsukihime, near side routes - Arcueid: "A circuit must have opened in your eyes, Shiki. Were you born with eyes like that?" Shiki: "No. They became like this a long time ago, but I wasn't born with them".
- ↑ 2.0 2.1 2.2 2.3
 Kara no Kyoukai Special Pamphlet - Encyclopedia: Mystic Eyes of Death Perception [Others], p.035-036 [T]
Mystic Eyes of Death Perception [Others]
Ryougi Shiki's ESP. Although it has some characteristics that are similar to the Mystic Eyes in magecraft, it is classified as an ESP.
Eyes of Direct Death allows the user to perceive the the conceptual "Death of an Existence" as visual signals. Death emerges to the surface of an existence (objects, animals, etc) as lines. Cutting along the lines will result in "Death", regardless of the constitution or properties of the object.
Ryougi Shiki acquired this power after spending two years in a comatose state and contacted " " (Kara) for a prolonged period of time. Shiki's body already had the ability to perceive the Lines of Death, the accident merely awakened this power.
Of course, Eyes of Direct Death is only one aspect of the powers of this body called "Ryougi Shiki".
- ↑ 3.0 3.1
Tsukihime, Hisui route “I fell into a condition where my eyes would not function in addition to the decrease in my physical body strength. Well, I somehow understood that I went blind. When I stabbed my knife into her body, the only thing I was able to see were those "lines". So when I was told I went blind, it didn't shock me that much, but then, my sight came back shortly after. The examination revealed absolutely nothing wrong with my eyes, but only problems with my nerves. Rather than my cut nerves connecting themselves, it seems that it's more like the nerves which were numb healed up. …… It seems like my eyes will not go blind that easily. Or it might be that even if I do go blind, I'll still see those "lines"."
- ↑ Kara no Kyoukai volume 4 - "Is it the 'mystic eyes of death perception'? It's too wasteful to destroy that, Shiki. Especially seeing as anything you can see will be seen even if you ruin your eyes. You see, a curse is something that comes back if you throw it away."
- ↑ 5.0 5.1 Kara no Kyoukai, Overlooking View, chapter 1: "After I was in a coma for two years after that accident, I was able to see things that were "not supposed to be there". As Touko would put it, I am not seeing them, but rather observing them. In other words, it seems that I am able to perceive at a higher level with my eyes and brain."
- ↑ 6.0 6.1 6.2 6.3
Kara no Kyoukai volume 4 -"You shouldn't try to look at exteriors. Every object has flaws..." "Well, you see, that was definitely a control mechanism Shiki used unconsciously. You shouldn't try to look at exteriors. Every object has flaws. The fancy of wishing everything could be taken apart and remade only exists because there's no such thing as a perfect object. Your eyes can see those flaws, as if they were a microscope. Your spiritual sight is too strong. You can see those lines that are invisible to us, and that brain of yours that was in contact with death for so long can even understand what they are. In conclusion, you can see death. Not only see it, but you can even touch it. A living organism's lines of death will keep changing position as long as it's alive. The ability to see those lines clearly, there's not much difference between that and mystic eyes that can kill with a look. If you must stab those eyes, I will receive them instead. I will pay you any price you name."
Kara no Kyoukai volume 4 - "Your mystic eyes that can conceive another's death by just looking..." "Well, it will only be a little better than now, but I suppose it's better than nothing. Your mystic eyes that can conceive another's death by just looking are the first since the time of the Celtic gods. Erasing them is too wasteful." It's called Balor. The lady adds some incomprehensible words.
- ↑ 8.0 8.1 8.2 Kinoko: It's not quite so much the eyes, but how (R) Shiki perceives things that has a large effect on her powers. First, Mystic Eyes and brains work as a set. For example, Tohno Shiki from "Tsukihime" normally can't cut concepts like Shiki does, but that's because the specs of the Mystic's Eye's user's brain is different. Tohno Shiki isn't suited in the aspect of recognizing "concepts". (Ryougi) Shiki is specialized in the visualization of events that stem from " ", while (Tohno) Shiki became submerged in death and became specialized in killing living things. By the way, Asagami Fujino's Mystic Eyes also work the same way. In her case, she can't twist things that she recognizes as not being twistable.
- ↑ 9.0 9.1 9.2
 Kara no Kyoukai Special Pamphlet - Encyclopedia: Line of Death [Others], p.032 [T]
Line of Death [Others]
The constantly shifting, graffiti-like lines visible to Ryougi Shiki.
The lines appeared on everything, and by slashing the lines with a knife, the object bearing the lines could be "killed". Since the lines posed no resistance, everything could be killed with the same ease.
The Lines of Death are not the lines at which "an object can be easily cut apart", rather, they are the concept of longevity given form.
Strictly speaking, it is not "tracing the lines causing the object to fall apart", but "ending the lifespan and killing the object".
To put it into simpler terms, it is the erasure of existence rather than physical destruction.
Ryougi Shiki is a living being, and she seemed to have a easier time seeing the end of a living being. This is because as a living being, it is easier to comprehend "the death of a living being". In order to see the Lines of Death of minerals or Concepts, she either has to become minerals, or use her brain and tap into her "imagination".
In summary, the end (lines) of an existence that humans cannot comprehend is not visible.
- ↑ Tsukihime, Kohaku route, when Shiki confronts Akiha near the end. "Bringing her hand to her mouth in disbelief, she [Akiha] looks at my eyes. '—What beautiful—blue, eyes.'"
- ↑ Kara no Kyoukai - Mirai Fukuin - The two eyes, / carrying a blue light, / glared at her surroundings, the result it held.
 Fate/Grand Order - Assassin Profile [T]
Shiki Ryougi - Assassin
Illustrator and Voice actor
Illustrator: Takeuchi Takashi
Voice Actor: Maaya Sakamoto
Noble Phantasm: EX
Mystic Eyes of Direct Death: A
Eyes of Mind (False): A
Yin-Yang Fishes: B
Presence Concealment: C
Independent Action: A
Vijnapti-Matrata・Mystic Eyes of Death Perception
Type: Anti-Unit Noble Phantasm
A girl you met on the irregular singularity・Boundary Formula.
Dressed on a blend of Japanese and Western clothes, a mannish way of speaking and dynamism with no hesitation.
Any of those can be perceived as conspicuously abnormal in middle of a commonplace situation.
Due the unique constitution of seeing death, she confronted various bizarre incidents and continuously cut them down.
The implicated party is not concerned at all, but seems that she herself is becoming an urban legend that strolls around late at night.
Level 1 Bond
Source: Kara no Kyoukai
Alignment: Chaotic Good Gender: Female
Nimbleness that gives the impression of a cat. Or rather, she is a cat in both mind and body.
Level 2 Bond
- Mystic Eyes of Direct Death*: A
Among the many superpowers designated as mystic eyes, this is one of the highest grade.
A superpower among superpowers, a rare item among rare items.
Regardless of being organic or inorganic, it reads into the primary factor of death in "living**" things and visualizes it as a phenomenon that can be interfered with.
The world observed from the mystic eyes of direct death is landscape of ending filled with "lines of death", and a proper mental structure would have difficulties in daily life while facing this.
Shiki usually makes a compromise with this bizarre field of vision by shifting the focal point and overlooking all things.
Level 3 Bond
- Yin-Yang Fishes***: B
To want to keep this alive is, in other words, to kill it; to want to fulfill this is, in other words, to injure it.
Blessing and loss are two sides of the same coin.
Just like the relationship between men and women.
Residual sense of pain. This Shiki supplements NP by losing HP***.
Level 4 Bond
"Vijnapti-Matrata・Chokushi no Magan"
Rank: Type: Anti-Unit Noble Phantasm
Range: 1 Maximum Targets: 1 person
Yuishiki・Chokushi no Magan.
An attack that opens the mystic eyes of direct death to maximum and severs the target's "lines of death".
Regardless of possessing a life-span of some millions, recovery powers that resuscitate you from a interrupted state or a stock of lives of some hundreds, because it exposes "the concept of death in regards to that specimen", it gives a fatal wound while disregarding such qualities of immortality.
There might be lives that die-hard, but no life can escape death.
--the end is common to all things.
Level 5 Bond
The Ryougi House is a pedigree with an old history that, for generations, has devoted itself to the research and experimentation of the "ideal human body"
The likes of "ego" is unnecessary to the ideal human.
It is fine so long you have the personality (soft) that can switch in accordance with the purpose at hand, and an almighty body that can accurately perform its commands.
Although such creed, conviction was proved at the end of several hundred years, that was something entirely different from what they had conceived.
Ryougi Shiki is the current heiress of the Ryougi House that was born as a result of all this.
At a first glance, she appears to have a cold, exclusive character.
Although she has a mannish way of speaking and conducts herself as if a man, she is different from a "cross-dressing beauty" since her true nature is helplessly feminine.
Despite putting airs of an outlaw, she is a lonely person with an elder sister disposition at her core, so she ends up thoroughly taking care of those she took a liking to.
As for why she has a mannish way of speaking, why she is severe towards those with multiple personalities, please refer to the "novel・Kara no Kyoukai".
*for those who don't know 1: there is a pun here, 直死 (chokushi; roughly direct death) reads the same as 直視 (chokushi; meaning to stare, to directly look someone in the eye);
**can also be translated as "functioning"
***for those who don't know 2: this refers to that black and white circle that is a famous yin-yang symbol. Apparently, that thing was made having two fishes swimming around each other as a motif.
****I would understand if this was made by a native English-speaker, but to think that a Japanese came up with this pun..
両儀式 - アサシン
- Mystic Eyes of Direct Death*: A
Kara no Kyoukai - Volume 4 - "People, walls, even the air itself... there are incredibly fine lines visible on everything." The first thing I saw upon waking up from the coma was not the surprised nurse running towards me... it was the line wrapping around her throat. People, walls, even the air itself... there are incredibly fine lines visible on everything. Those lines were always moving and irregular. But I suffered from an obsession with the idea that death would spread out at any moment from those individual concepts and pull me in. I saw a hallucination in which the approaching nurse crumbled into pieces starting from the line in her neck.
- ↑ 14.0 14.1 14.2 14.3
 Tsukihime Dokuhon PlusPeriod - TSUKIHIME Dictionary: Mystic Eyes of Death Perception [Unusual talent], p.184
Mystic Eyes of Death Perception [Unusual talent]
The eyes possessed by Tohno Shiki, that can see the death of things.
This death is expressed as black lines and points. The lines are places where a substance breaks easily, and the points are death itself. If a line is cut, then even if the main body survives, that particular part will die, never to move again. If a point is pierced, then the individual will stop functioning completely. Also, while lines can be seen without consciously trying, seeing points, the source of those lines, requires extreme concentration.
Though they are said to see the form of death, strictly speaking it's more accurate to say they're reading the lifespan of a substance – the existential limit determined at the moment of creation. Now, this was already covered in the main story of Tsukihime, but lines cannot be perceived on things that can't be killed (destroyed) in the current world. It's probably because as a human, Shiki's point of reference conforms to the limits of the humanity of his era.
Originally, Shiki's eyes were meant to "see that which cannot be seen". However, after having two near death experiences he was somehow connected to (the Root), and his brain began to be able to comprehend death itself. Or to put it in other words, it is only by virtue of his mystic eyes and brain working together as a set that he is able to perceive death.
By the way, Shiki's eyes turn blue when he intentionally tries to see death. Seeing as how blue is the color of pure eyes, it's likely that Shiki's eyes were originally of that type.
- ↑ 15.0 15.1 15.2
 TYPE-MOON Fes. Official Pamphlet 10th Anniversary Q & A Booklet:
Q: Since Saber and Gilgamesh have physical bodies in Fate/Stay Night, can Shiki see lines on them?
Q: Since Saber and Gilgamesh have physical bodies in Fate/Stay Night, can Shiki see lines on them? (@LestatDusk)
A: Not just when they have a physical body, the Mystic Eyes of Death Perception are effective even when they're in spiritual bodies. For Shiki [Ryougi], if the opponent can be recognized as "living" (not "life", but "live"), she can see the lines of death. For example, the ghosts in Overlooking View were dead, but they were "living" in the sense that they can interfere with the current world.
Also, why she didn't succeed against the Sarira in Araya's arm is because it belonged to an enlightened one who achieved "becoming extinguished, alive." To kill it by the lines of death means she has to decipher advanced "lines of death" levels higher than the normal concept of death. But what's sad about bones is that rather than having to do that, they'll turn into ash if you burn them. If you have time to be using Death spells, level up and beat it physically.
- ↑ Tsukihime, Arcueid route. Shiki kills the hallway in the school to get Roa. Losing the ability to hold objects elevated from the ground, it crumbles. “The passageway is literally killed. The blocks which lost their meaning break apart and crumble away.” Mirror moon translation version 1.1
- ↑ Arcueid's route - "You don't seem to understand. Shiki, your eyes do not kill the body, but the meaning... existence itself.
- ↑ Tsukihime, near side routes. Shiki kills Nero's familiar mid-air and it simply falls to the ground.
- ↑ Tsukihime, Hisui route. Shiki kills poison inside Kohaku's body.
- ↑ Tsukihime, far side routes. Shiki kills the vampire blood Satsuki injected inside him, preventing it from turning him into a vampire.
- ↑ Kara no Kyoukai, Remaining Sense of Pain, chapter 6. Ryougi Shiki: “I couldn't do anything else so I just killed the disease in her stomach.” Baka-tsuki translation version : ]
- ↑ Tsukihime, Arcrueid route. Roa was still alive and being able to talk for a short time even after getting his dot pierced.
- ↑ 23.0 23.1 Kinoko: "As long as it's alive", however. The thing is, God isn't alive or dead so Shiki can't do anything to him. However, Shiki can kill what she thinks to be "alive", for example, say a telephone that she perceives as "being alive because it's not broken". On the other hand, if it's broken and therefore feels it's "already dead", she won't see lines.
 TYPE-MOON Fes. Official Pamphlet 10th Anniversary Q & A Booklet:
Q: Are Ryougi's Mystic Eyes of Death Perception a type of Eyes of Clarity?
Q: Are Ryougi's Mystic Eyes of Death Perception a type of Eyes of Clarity?
A: Yes. The Ryougis and Nanayas were good friends! (A long time ago)
Although the two types of eyes are inheritable, if you consider regular Mystic Eyes as traits that modify the body..... something like the inheritance of the traits of the parents' body...... then Eyes of Clarity are the inheritance of fate and destiny......the offspring continues the parents' will and their quest.
Even though Eyes of Clarity are the parents' karma reflected in the offspring, they can only be inherited by "humans" with high spiritual potential.
In other words, Mystic Eyes of Death Perception are a type of hybrid power. The cheating powers of both Shikis ought to have a limit!
Tsukihime, near side routes Arcueid:"I see. I thought the Mystic Eyes of Death Perception only existed in fairy tales. But, I guess there is someone who can use them, a mutated monster like you."
Shiki:"W--what!? I don't think a vampire can call me a monster!"
Arcueid:"A monster is a monster. There isn't anyone, even amongst us, with Mystic Eyes that can 'see the death of things'.
Tsukihime, Arcueid route ”Probably, if you want to, you can see the "death" of non-living things. But in order to do that, your brain has to open its circuits from the classification of living things to the classification of non-living things in order to understand. --- That is normally an impossible process. As a result, it overloads your brain, and you'll end up being useless. (...) You understand? If you can just see it, it won't be a problem. But stop trying to see things you can't perceive. The blood vessels in your brain will burst, and it'll all be over.”
 Melty Blood Act Cadenza PS2 Manual - Dictionary: Mystic Eyes of Death Perception [Unusual talent], p.052
Mystic Eyes of Death Perception [Unusual talent]
The eyes possessed by Tohno Shiki, that can see the death of things.
A unique ability that allows the user to grasp the death of living beings as points and lines. Stabbing or cutting these will ignore things like vital activity and kill the target directly.
Though they are said to see the form of death, strictly speaking it's more accurate to say they're reading the lifespan of a substance – the existential limit determined at the moment of creation.
Lines cannot be perceived on things that can't be killed (destroyed) in the current world. It's probably because as a human, Shiki's point of reference conforms to the limits of the humanity of his era.
Originally, Shiki's eyes were meant to "see that which cannot be seen". However, after having two near death experiences his brain began to be able to comprehend death itself. Or to put it in other words, it is only by virtue of his mystic eyes and brain working together as a set that he is able to perceive death.
 Tsukihime Dokuhon PlusPeriod - TSUKIHIME Dictionary: Ryougi Shiki [Person's name], p.190
Shiki Ryougi [Person's name]
The protagonist of Kara no Kyoukai. Able to see lines of death, just like Tohno Shiki.
She wears a traditional kimono paired with a leather jacket and high-laced boots.
Though she always carries a knife, her true talent is with the katana.
The last name "Ryougi" and first name "Shiki" both have an appropriate meaning. Consequently as a user of the mystic eyes of death perception it can be said she is several ranks higher than Tohno Shiki, who is pretty much her polar opposite. In fact, his personality is actually close to Kokutou Mikiya's.
For more details on this Shiki, please consult Kara no Kyoukai.
- ↑ Kara no Kyoukai volume 5 - "The mage clicks his tongue in exasperation. He hadn't considered the possibility that Shiki's Mystic Eyes of Death Perception would be so powerful. To think that she could kill a concept like a ward which had no form, or life, that kind of absolute power ---."
- ↑ Kara no Kyoukai Mirai Fukuin
Kara no Kyoukai Paradox Spiral. "--- This bastard, I can't see him... ! Hiding her inner surprise, Shiki coldly looked the man over. The death she could see on people if she merely wished to, this man doesn't have any. If you felt along a human's body there were lines that put an end to the part they belonged to if they were cut. Whether those were the seams of life, or a weakness in the bonds between the molecules, Shiki didn't know. It just was that she could see them. Without exception everyone she had seen until now had possessed those 'lines of death'. But, upon this man, those lines were too faint. Strongly, harder than she had ever done before, Shiki glares at the man. Her brain may have overheated, because she observed the opponent till a portion of her consciousness went white, only then could she see it. ... In the centre of his body, she can see a hole in the middle of his chest. Going round and round like some child's scribbling the line is drawing a circle at one point. That might explain why it looks like a dot."
Kara no Kyoukai Paradox Spiral" ... Indeed, I was foolish. I should have had all the proof I needed after the events at the hospital. Whether it is dead or alive, if it moves you cut off the root of that motion. That is your ability. Even if I am a stopped organism, as long I exist like this there is a thread that permits my existence. If that is cut I would definitely die. The unique exception is this left arm, but even that can't be hidden forever. No matter which saint's bone it is as long as it functions there will always be a cause for that movement."
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