A/N: I just received my grades, and that is the first time I really get straight high grades. O.O

But then, when it comes to fanfiction, I now forget how to have fun in making my works. I focus on chapter reviews instead. T.T

Making the second fanfiction series made me realize that.

Disclaimer: I don't own anything. Credits go to Gen Urobuchi and TYPE MOON for Fate/Zero, and Hiroshi Shiibashi for Nurarihyon no Mago.

Chapter 15: Perseverance

Kirei is leaving the forest with more questions than answers. How did that man made the two women stand up to him? Is it out of duty, or is it out of something else? Those questions do not ease up his mind one bit. If anything, it made him even more baffled than ever.

Another one? Kirei thought as he is about to exit the forest. Assassin is now cut off from his perception as he sensed someone strange. He prepared his fists just in case. Good thing he still has his Black Keys, but still, his Servant muttered otherwise in terms of preparedness.

Kirei…sama. The female Assassin quipped. I…have been caught. It seems that I am in her Reality Marble.

You are mistaken, Assassin. The culprit appeared from the haze of eight toriis standing still. She then cut off the Shared Perception forcefully with a wave of her hand, cutting off the communication with Kirei. "This is not a Reality Marble. This is only a Bounded Field designed to further increase my powers in spell casting in exchange for a relatively short time." She then kneeled down and touched the mirror that is in the middle of the Bounded Field.

At once, the Bounded Field dissipated, leaving only her and the culprit. She then saw that the one who made it is a Caster. But she sensed something different in her, as the mirror that she is formerly holding on is gone in her hands.

Kejoro took a deep breath as she now slowly unsheathed one Dirk from her kimono. She then used Reinforcement to aim better on her target. Of course, she blended in the shadows to mask her presence. That unsuspecting person will die in a single Dirk.

Or so she thought.

To think that the shadows are her ally is a big mistake. For the target's ears are sharp enough to hear a hiss just in time and promptly block it with one of his thin swords. She then widened her eyes at the realization that she just gave away her location. So she now opened her bag containing the Dirks and with her inhuman abilities as a youkai, she now flung them as fast as she can at the target.

Imagine her horror when she finds out that the person she has been attacking is the priest that they fear the most. And of all days, it has to be today. Good thing she has her skills, but how long will she hold him out? Even more wishful thinking came up her mind, as she decides how long will the fight last before she will be able to kill him.

Kirei prepared himself as he is now being assaulted by a barrage of Dirks. He now avoided each and everyone of it until he sped up to the source of that barrage. It seems to him that the one who is using the Assassin's Dirks left and right must have been the one who stole those from the former kill that they have.

Meanwhile, Kejoro did not prepare for something as intense as this fight, as she supposed that Masters are Magi. But it seems that she will take this one differently, as he prefers more of a fist fight rather than the grand Magecraft that Magi always employ out of their pride.

As the saying goes, kill or be killed. This is the moment that she prepared herself for. And this time, she will use everything that she got. Even though Caster forbids her to do so, she must do it, otherwise, she will be killed by that priest first. She then realized that her thoughts are too slow as the priest now approached her and their distance are only inches apart as the priest decided to set up his stance quickly, establish a center point of gravity for initiating an attack, and directing the power from the feet up his right fist, he now aimed his fist at the very heart of the culprit that dared to take his life.

"Shall we do this as ladies should?" Caster acquiesced as Assassin prepared her knives and Dirks. Assassin just laughed at her attempts of a civilized conversation.

"This is the first time someone asked me for a fair fight. Fine, then. But do not expect me to be fair, Servant of the Spell." Assassin spat back as she sharpened her blades and adopted a stance of martial arts that she learned from the Hassans.

"I was really expecting for that response, Servant of the Dagger." Caster was all fired up as she enhanced her physical capability through her elemental spell of fire. "In fact, that is my line." She also prepared the Dirks that Kejoro had picked up from their last skirmish with Assassin.

"Oho, is that my comrade's weapons?" She mockingly asked. "I wonder what you might do about it."

Caster replied by filling the Dirk with prana. As Assassin flung her knife to Caster and running towards her direction in sync with the flying knife, Caster Reinforced her legs and used it to kick out the knife and used the Broken Dirk to plunge it to the Assassin's heart and hope that she'll burst.

"That will not work on us twice." Assassin gloated as she deftly avoided the dangerous object that could explode in seconds and returning Caster the favor by striking at her neck, which Caster sensed it in time just to reinforce her neck so as not to break under the pressure of Assassin's fist. Her weapon already exploded as the weapon did not connect to its intended target. Caster was then sent flying from the impact of the strike and crashed into a nearby tree.

"I…felt that. Reinforcement…was not enough…huh?" Caster was already panting as she tried to catch her breath after that impact, chanted a single – line spell to temporarily heal her neck enough to let her breathe, then weakly stood up against her taunting opponent.

"Is that all, Servant of the Spell?" Assassin taunted. "Where's your silent rage that sent our comrade smoldering? Any longer than this and Servants will think that I'm just playing with you all for the sake of an act of entertainment."

"That's not all I have, Hassan." Caster smirked as she prepared to infuse her spell Chaos Heaven on her Dirk through her paper charm sticking on her forearm. Assassin knew that the fight just started and with her A rank agility, she now charged forward at Caster.

Take a deep breath… and rid your mind of your other thoughts.

Caster's advice might be helpful in this situation, but it's not enough to prepare for the incoming attack of the priest. What she needs is a boost of power, and prana is not enough for the priest's incoming attack.

This is no time for doubts. Let's see what you got, nisemono shinpu. Kejoro took a deep breath as she saw the attack coming using her prana – enhanced eyesight. Then she assumed a stance, confronting head – on with the priest. Activating all of her four circuits, and combining her prana with Osore, she deflected the hardened fist of the priest using the focus of her combined prana and Osore to her palms.

She can't believe at what she saw, for she actually moved his fist away from her direction, leading to the fist punching at air at breakneck speeds. The heat surging from her Magic Circuits emanated a steam from her arms and legs.

First Day of training session with Caster:

Kejoro sat up straight like a student would listen to her teacher as Caster posed as an esteemed professor while she gave her first lesson to Kejoro on fusing Magecraft with physical abilities.

"Let me prove to you how strong physical attacks enforced with Magecraft can be." She promptly demonstrated it by using Reinforcement on her fist. Then finding the cherry blossom tree, she almost obliterated it in one single punch. To which Caster attended to her injuries after.

"You know, Caster, congratulations." Kejoro applauded sarcastically. "YOU JUST DESTROYED THE NURA CLAN HOUSE'S CHERRY BLOSSOM TREE THAT STOOD FOR THREE GENERATIONS!"

"That…I did." She stuck her tongue out in a playful manner. Then, placing her hand on the remains, she chanted a spell. She then restored the cherry blossom tree using her Witchcraft ability and it returned to its former glory. Bonus points for Caster who is still attending to her injuries.

"Oh, right, Caster – class. I forgot." She deadpanned at the forgotten fact. They only have a week left before the actual Grail War starts, and they must now hurry up with their training or they will end up as neophytes waiting to be devoured by skilled Magi.

During practice:

"I will never allow you to use your tricks while training for your prana usage, is that clear?" Caster huffed at the question as to whether she will be allowed to use Osore or not together with prana. Kejoro is now disappointed.

"Don't you see? I'm training you to master the art of reinforcement through Magecraft." Caster chided like a teenager proving a point to her mother. "You'll just end up using that trick again if you do so. Do you want to get stronger or not?"

Kejoro pouted as she now let her Osore dissipate. "Of course I do! But how can I fight them by using Magecraft only?"

"You will see in actual battles what Magecraft are used for." Caster silently snickered at her unwitting pawn for an experiment before steeling her expressions. "For now, no tricks, Goshujin – sama!"

The priest is slightly surprised at the unexpected development that he just saw. She is an unorthodox magus just like him. But, as a spirit, it should be impossible for her to use Magecraft as she is already a spirit that can do things impossible for Magi. But for him to find out whether she is an actual spirit or not, he might have to use one of his Black Keys stored up in his sleeve. Unfortunately for him, he has only three Black Keys for paralyzing a spirit at best.

His only option was to exhaust the spirit Master using Ba Ji Quan, a martial arts technique perfected by Li Shuwen, before throwing or stabbing the Black Key directly at her heart. But it seems that it will take longer than he estimated, for the spirit that he is battling right now is gaining perfection on her Breathing and Walking techniques the more she uses prana together with an unknown source of her power.

Kirei's reply would be to swing his forearm like a sword, riding first her deflection technique instead of meeting it to avoid injury, then swing it back with that same speed aiming at her body with full force. If she deflected it with the side of her hand, then he'll finish her off with a fist that will target the solar plexus. If the swing that will guarantee to smash her side ribs didn't succeed, at least the fist will.

So that's what he did. He swung his forearm, but Kejoro held the forearm firmly instead of deflecting it as he might expect. He twisted his forearm quickly to escape from the grip, then aimed his deadly fist at her solar plexus, which will stop her breathing, and hopefully, her heartbeat.

But Kejoro stopped the iron fist with her two hands infused with the combined power of Osore and prana. Knowing that her Osore type is of Manipulation, she used it to manipulate her body's strength to deflect the fist with her left hand. Using her left leg as a pivot, she used her right leg to aim a swift kick to the torso, which Kirei replied with the same kick to defend his torso. The result is an explosive wind created by the clashing of pure human strength and youkai power.

What the-

Kejoro is at a loss for words when she found out how powerful he is. She already combined prana and Osore and infused it into that kick, yet this priest has the capability to even the odds with pure human strength. It is at that moment when the priest decided to pull a piece of paper from his sleeve. Infusing his prana into it, using the Circuits that the Church provided him, he turned it into a thin saber with a red hilt. Kejoro stared at it for a fraction of a second, before realizing what it is. Her eyes widened for a full second realizing what that weapon can do to her.

Crap, that must be-

She did not even prepare for that weapon. The information she researched from books are now considered useless as she found out that every Executor has been issued Black Keys, which are designed to exorcise spirits. Even Servants will die from that weapon, provided that the Executors have the element of surprise. This is the first time that she saw a Black Key, and unfortunately, Kejoro will be the first one to experience the pain of being stabbed by it.

Meanwhile Kiritsugu still felt two prana signatures within their territory, and one of them makes him feel uneasy.

Kirei is still here? Why? It seems that someone is keeping him longer here than necessary. What more could he extract from his wife and assistant? He already got his answers, so he should be leaving the forest as of now.

The other prana signature is the answer to his question. But that prana signature cools down as quickly as the Magic Circuits are opened. That other signature must have been using some kind of a trick to fool his senses into thinking that the user does not really use prana, but uses other sources as its power. By all means it should be impossible, since Magi always had their Magic Circuits active whenever they try to cast a spell.

Unknown to him, that other signature actually uses prana, but the usage of it is cloaked by the other power source that it had, making the devices detecting heat signatures useless as crap.

Not minding of the two signatures as of now, he emptied his Thompson Contender of the shell left by the Origin Bullet and let it drop to the floor. Only the clanking of the bullet shell is heard as he puts the Contender inside his coat. Meanwhile, Irisviel continued to heal Maiya with her Magecraft as his assistant rests on the bed.

Maintaining his façade, he asked her this question. "How long before we can use Maiya again?" Irisviel assessed her body with her reinforced eyesight before she made the conclusion.

"Three days to be exact." Irisviel mumbled as she sees the ruthless façade of the Magus Killer yet again. She is used to it as the days pass, as Kiritsugu has told her earlier that he will be the cause of her death. But every time that she sees those eyes, there are times where she wished that they should have done away with it in the first place and escape the Einzbern's clutches to live as a happy family like Kiritsugu has suggested. No wonder she saw Kiritsugu even sadder than the last time as he saw the place where they will fight.

But she will make sure that her sacrifice will not be for nothing. She made sure that her own prayer will reach the Grail. Saber's kingdom will be saved, Emiya Kiritsugu's dream of saving the world will happen, and her own wish of them being together as a family will happen.

"Kiritsugu…" She mumbled as she saw the back of the man leaving the room, reloading his Contender with the Springfield bullet as he left. Earlier, he turned down Saber's offer to hunt down Caster, as she is only supposed to fight Servants under his rules, not hers. Besides, even after realizing the fact that this is only Tokiomi's play to regain the lost Command Seal, her desire to uphold the law gets the better of her. The more that she reminds Kiritsugu of what he is supposed to be, the more that Kiritsugu gets angry at it.

At the same time that Kejoro's fight was going on, Caster released Chaos Heaven spells through her Dirks to create a slashing wind, which Assassin deftly avoided thanks to her years of practice. Assassin still charged forward, and Caster still has no plans. Unless…

She dropped the Dirks. Assassin was caught off guard at the moment Caster dropped her weapons and laughed, which slowed her pace of charging forward a bit.

"Of course, how could I forget my Witchcraft ability ranked EX?" Caster foolishly laughed at herself. Assassin thought that she lost her mind knowing that she is greater than Caster in terms of fighting strength. But then, Assassin stood wide – eyed in surprise as she boosted her prana higher and infused Chaos Heaven spell on her fists covered in gauntlets and Fiery Heaven spell on her legs. The talismans shredded away by the powerful wind and charred away at the power of her flames.

"Assassin, did you know?" She now wiped off the trickle of blood from her mouth while baring her little smile. "Witchcraft is a kind of magic which uses the raw materials inside the body of the user instead of the materials surrounding them." Caster was now chuckling at her own foolishness while still charging her spells at full power. "How could I be so stupid? I'm a Caster and yet I use spells through Magecraft instead of Witchcraft."

Wait a minute. If she used spells through Magecraft, then what I'm experiencing right now is half of her power? Assassin wondered while still dazed at the output that Caster is giving off.

Caster had read Assassin's thoughts and she concluded "That's only a sixteenth. If I release this at full power as a Servant, and a Caster of all classes, it will only be at a fraction of what my real strength is. Maybe even I will faint after that sheer output of power." She now snickers in a murderous glee.

Assassin is left speechless for a split – second as the words registered in the Servant of the Dagger's mind. Just what is she?

Shaking off the fearful thoughts, Assassin charged at Caster and aimed a swift kick to the head, and Caster replied with the same attack to defend her head, creating an explosion of fire around the forests of Einzbern and a crater in the middle of the fighting ground. Good thing the force of it is almost nullified by the other force which Kejoro and Kirei created from their clash of power.

"Now then, shall we continue where we left off?" Caster inquired murderously while their legs are suspended in a high kick pose in those seconds. Assassin spat back a retort which had an equal amount of killing intent, thanks to her experience of assassinating a lot of people in her lifetime.

"As you wish, Servant of the Spell."

She then exchanged quick and forceful blows with Caster, using her C – ranked strength together with A – ranked Agility and A+ rank on the skill of Expert of Many Specializations, enabling her to used mixed martial arts of old and new on Caster, who has the same C – ranked strength, but B – rank on Agility that is only boosted by a fraction by reinforcement and EX rank on the skill of Witchcraft.

Every blow that they unleash follows a specific rhythm that only they can follow. They try to outdo each other in preciseness, speed and strength. Every Dirk that the Assassin unleashes every now and then in between blows is countered by Caster kicking it away and countering with her own style of attack. One must remain standing after all.

Caster knew that she has to end this fight quickly, since she now revealed one of her skills to Assassin. Her spells will not endure for long either, as she felt the exhaustion escalating quickly on her body because of using mana through reinforcement and spells of Chaos Heaven and Fiery Heaven were infused on her fists and legs. So she decided to put her all into one attack. She broke the rhythm by two swift kicks, which Assassin quickly blocked through sheer instinct. But Assassin did not expect the sudden somersault of Caster, leaving her open for Caster's ultimate attack.

Caster then poured all of her strength and Fiery Heaven spell on her legs, creating swirls of flames around her limbs. Reinforcing her legs further, she ran as fast as she could and jumped in the air, while Assassin looked on. Assassin had no time for those tricks, so she used Dirks for the counter – attack, hoping that the poison will run through once she stabbed one of her limbs. Caster then shouted her attack which will, in her wild guess, will render her opponent asunder in red – hot flames.

"DAITENBATSU!" Her Fiery Heaven Spell grew even stronger and rendered the poisoned blades melting under her feet. Assassin's eyes went wide open as Caster unleashed the full force of her attack strengthened by spells. In an instant, Assassin's Dirks vanished and the next thing that she saw was the smoldering flames, which shifted her vision immediately to darkness.

Fortunately, for a split second, she saw her bracelet that Caster has left her earlier. As the priest will deliver the final blow, she now destroyed the bracelet that is wrapped around her wrist by pulling the delicate bracelet out forcefully.

The bracelet that Kejoro destroyed is an actual signal for the other to come to their aid. Within a radius of two hundred meters, the other can still feel the jolt if one is in deep trouble. At the other side, without even looking if the one that she fought is dead or alive, Caster now closed her eyes and concentrated deep enough to employ a skill that she did not use in a very long time.

At once, she disappeared from that place, and the next thing that she knows is that she is near Kejoro's reach. She heavily panted from that skill that she used, but she saved her inner complaints for later, as she now saw Kejoro about to be stabbed by what seems to be a dangerous object for spirits.

"Hitotsu, futatsu, mitsu, Mugen no Kekkai!" Caster announced as she deployed three talismans at blinding speeds to form a shield on Kejoro. But the priest's Black Key will still break the shield that Caster has formed. Seeing as her shield talisman is not enough, she drew on the power of her mirror levitating around her to defend that strike. She chanted a line in archaic Japanese, then ran to defend her Master.

"Aphotic Cave!" She then pushed Kejoro out of the way and tried to block the weapon, to which she is rewarded by a Black Key that stabbed her defense and her right forearm. She winced at the pain, to which Kejoro took it as a chance. Reinforcing her legs for speed and combining it with Manipulation for the flexibility of her legs, she whisked Caster away from the priest. They now dissipated in spirit form.

The priest now confirmed that the two wildcards are spirits. But the question still stands. Do they have the same interest in that man as him?

He is now leaving the forest when he sensed someone that should not be there in the first place, watching all of those scenes just like a play have been going on. Without even looking back, he now stated the name of the formless being that was there in the first place.

"Were you enjoying this, Archer?" Kotomine Kirei coldly declared as the Servant now appeared from the confines of the trees. For Kirei, it seems that he has some sense after all to use his Gate for some things other than firing his Noble Phantasms like arrows. But what made it even more curious is that there are things that he has in his Gate other than spears, swords and axes. Not that he wants to pry in his treasury, but what is in that Gate that makes it special aside from the fact that it holds all the treasures of the world before anything is ever conceived?

The golden Servant, Archer, took out a cloak that is blocking his presence as they exited the Einzbern Forest. He then dropped the cloak, and that red cloak disappeared from their sight, as if the golden water had caught it.

"I'm slightly enamored by this play to say the least." Archer flatly replied as his interest in Caster is now dampened. His high rank in Independent Action is getting him nowhere, except for the fact that he now has a playwright still in the rough.

But as they say, patience can be very rewarding only if one is persevering enough. And he will do just that. He will not push the young man further, but will wait until he himself will set chain to events worthy of his sight.

Meanwhile, the Assassin who Caster thought that she is now dead, slowly got up, and after making sure that no one's watching anymore, she used her Presence Concealment and dissipated in a black smoke.

As he is leaving the confines of the Einzbern Mansion, he sensed someone that should not be there. Not a magus, but a spirit. Either way, he brought out the Calico sub – machine gun from the confines of his robe and set the firing trigger setting to manual. He spotted one figure, and he took a shot at it, but the figure's movements disappeared as soon as he fired. Another figure arose, and he shot at it once more, but then that figure also disappeared. He is not a fan at calling out on someone who is hiding like a coward, nor is he patient enough to even talk to them. But as clichéd as it may be, he called out to them, hoping that they will appear.

"Wherever you are, I can still find the both of you. You are still under our premises." Although it's true that the Einzbern mansion has a deployed Boundary Field thanks to his expertise, he cannot actually sense the range at which the person is actually in, unlike Irisviel, who has a minimal experience in sensing persons in their Boundary Fields with a range that can compete with a professional Magi's senses. He can only feel them if they are near enough.

As soon as the two of them are near his presence, he placed the barrel of the gun at the figure. But he is dumbstruck to find out what he saw just now.

"You again…" He clicked his tongue at the two figures in kimono just now. He saw Caster had made herself a sling out of her robes that she had torn from her kimono to support her right arm that is incapacitated by the Executor's Black Key. She will have a good time reprimanding Kejoro for her actions later. But for now, they must introduce themselves.

"Good evening. I believe we haven't introduced ourselves properly." Caster curtsied as she bowed down. "I am…" All of her formality is now cut off by the cold voice of Kiritsugu as he now spoke.

"You are the second Caster, I presume?" He deducted coldly while aiming his gun at the Servant. He does not want to waste time for a conversation as he wanted Lancer's Master dead right now to let his Servant regain her strength.

Kejoro is the next one to introduce herself. "And I am…"

She is now cut off again as Kiritsugu has lost his patience for the two of them. "Kejoro."

Both of them are dumbfounded at first on how he even knew Kejoro's name. But then, she is reminded of their earlier exchanges with Caster, not knowing that Kiritsugu heard them thanks to his Reinforced senses. It was then that she shot a glare at Caster, who just playfully bumped her head against her fist when she remembered it. "Now if you don't mind, I have a Master to kill." He aimed the gun at Kejoro. "Don't worry, both of you are next on my list."

He just smacked himself mentally right in the face for saying that. Since when did he become a talkative person? He should have shot those two idiots when he had the chance since they are not really participants of this war anyway. But he chose to walk away from that scene, which made him both relieved and angry at the same time. They followed him at a far distance.

Caster did not expect this kind of treatment, as she supposed that a Japanese person will understand them. But then she underestimated Kiritsugu's ways of life, therefore leading him to think that she is just another person that annoys him the most aside from his Servant, instead of a person who is supposed to help them destroy the Grail.

So she decided to march up to Kiritsugu, not minding of his two dangerous guns that he has right now. Kiritsugu, angry at the developments, decided to aim his gun at the Servant, as if asking her what more do they want from him. Caster faced him with pure hazed eyes, dropping all her innocent façade at this point.

"I see that you want everything straight to the point." Caster offered aggressively. She now speared her sentence across in a cold and professional voice. "We need you to destroy the Holy Grail as early as possible."

Even Kejoro is surprised at the coldness in her tone, sensing that Caster had dropped all her cheerful tone to make her point, and to match Kiritsugu's business – like demeanor. Remembering the information that Irisviel is his wife and at the same time the Grail, it will seem to him that she asks him to kill his wife. Kiritsugu stared at her eyes, and he saw that she means it. For some reason, he knew her origins, as if she gave off the feeling that she belongs to this country.

Kiritsugu has made his research earlier on the Grail, therefore he knows the exact locations on where the Grail will concentrate its powers for this year and for the next sixty years. But their request seems too out of place. Why should they summon a Servant in this war knowing that they don't have an actual wish? Is it for them to have fun, just like that boy and his Caster? His inner desire to be a hero dictates that he should not destroy that artifact, as it will be his only chance at wishing for the world to be at eternal peace. This war will be the last one that he will fight for.

"Why would I bother to follow your instructions?" He demanded for an explanation, as his rational thoughts and his heroic thoughts collide in a battle concerning the fate of the whole world.

"I thought you knew about it more than anyone else, Emiya – san." Caster chided. It seems that this woman is playing him around like a toy, taunting him like he had overlooked something important in his research. But it is the Einzberns' records after all, the ones who made the Grail System possible; therefore, it is impossible that there is a flaw in the system. Irisviel, his wife, has confirmed the integrity of the Grail.

Thinking back about it, he did see a flaw in the Third Grail War, about the Einzberns rigging the Grail to summon Avenger, or Angra Mainyu, as his real identity states, to win the Grail War for them due to them not winning it for the past two conflicts. But what happened later is not revealed in the records, leading to his logical suspicions that there must be something going on. However, he did not pried on it further, as it is strictly Einzbern's confidential files.

Meanwhile Caster restricted her giggles to a minimum, seeing as she drove her point across him. Kejoro just sighed at her antics. Maybe it is foolish enough to prove a point at gun point. She wanted to laugh at the situational pun that Caster is in right now but she can't. Emiya Kiritsugu is now lost in thought for the first time since his comeback in his career as the Magus Killer. That will be enough for him to change his mind about the Holy Grail War and decide to destroy the Grail and its system once and for all.

Or so she thought.

Kiritsugu, still staring at her golden eyes with deep coldness, pulled the trigger, and a deafening shot is heard on the silence of the Einzbern forest. Time slowed down as Kejoro widened her eyes in shock. She only heard from Caster the information about him being a Magus Killer. But that action that proves his ruthlessness is more horrible for her eyes more than what she experienced so far since the killing of his Second Master Nura Rihan. The only reasonable action that she can do right now is…

"CASTER!"

A/N: As Timmy's dad will say: I'M A BAAAD MAAAAAAAAAAAN!

For questions on how he pulled a Black Key from his sleeve, I took the concept of it from Tsukihime, which is a neatly folded paper torn from the pages of the Bible, then it is turned into a thin blade with a red hilt by chanting a line and channelling their energy into it. Expert users of it like Ciel and Kirei don't need to chant the line to activate it.

Now you know how Ciel pulled those Black Keys out of her bikini wear in Carnival Phantasm. -evillaugh mode-

EDIT (May 15, 2014): Made some minor changes. Will do it again if I have the time. :D

I will edit this if I have the time. Meanwhile, please rate and review.