In the middle of the practice room in the fourth 'deathly' magic development laboratory underneath the Yotsuba main house stood Tatsuya as he prepared for the battle within the family to gain his birthright

With everyone present as a witness he was ordered by his mother to show his power and defeat the opponents. Opposite him stood two guardians of the shibata family Tsutsumi Kanata and Tsutsumi Kotona; they were the second generation modified magicians of the bard series. As the shibata family was the one that wanted to test tatsuya's power Maya allowed them to pick anyone for their family and as already stated tatsuya's decomposition and creation are banned from use in this battle. But in the off chance that he could win, the shibata family didn't send their hair first.

Maya order Miya to remove the restrictions on his MCA and for her to only use her MI if he used his magics

Let the match begin as these words left Maya's mouth Kotona readied her body for the fight. "Kotona!" Kanata attacked Tatsuya upfront. However he wasn't able to follow up with the result. Everyone's eyes were fixed on Kotona who was launched into the sky. Kotona who was suddenly blown to the sky was falling in shock without preparing any landing posture and fell to the ground making a thud. While Kanata was distracted by his sister who was launched up into the air, Tatsuya drove his palm at Kanata's chest, just above the heart. At the same time, virtual vibration waves were implanted. However, the vibration magic was hampered by another wave that flowed into his body before it shook Kanata's heart. Kanata managed to disable the virtual vibration waves that flew into his body. He overrode the magic with a stronger phenomenon interference force. Kanata rolled back on his own, and a snap came from his left fingers. Tatsuya cancelled the acoustic amplification magic made out of his snap before it turned into a roar by creating a vacuum field between himself and the wave. However, in reality, he missed the opportunity to do so. "A surprise attack, right back at you!" Kanata wielded a specialised CAD in his right hand, a short barrel type, and pulled the trigger several times. A Magic Sequence which emitted a sound appeared the same number of times that he pulled his trigger. Tatsuya disabled the vibration magic, 'Sound Cannon', with gram demolition. "Tsk, that's a counter magic technique!" It seemed like Kanata had the tendency to voice out every single bit of information in the battle. Perhaps, it was to get his fighting spirit up. Certainly, the effect on enhancing his spirit in this fight was undeniable. However, from Tatsuya's point of view, it was a wasted used self-acceleration magic to appear in front of kanata. Kanata widened his eyes after Tatsuya appeared in front of him. Kanata who was unable to react, was hit and dropped his CAD, Tatsuya thrusted his fist into Kanata's solar plexus. Kanata groaned aloud while folding his body to fall, plunging, forward. The strike just now was not a combination of vibration magic. It was a pure fighting technique, the waves in Kanata's body that were to counter vibration waves weren't of any use. Tatsuya tried to strike Kanata in order for him to fall unconscious. He didn't have any intention to kill him, but he didn't mind going to any length as long as he didn't die in the aftermath. However, it ended prematurely by the quick force of the ball kick which was aimed at Tatsuya's head. Tatsuya promptly jumped back, disabling the 'Sound Bombs' which were strewn around him by creating vacuum around them. Kotona operated her CAD in regret even when she called the name of her younger brother. The Modified Body 'Bard Series' was a group of magicians who were especially good at Systematic Vibration Magic, especially in interfering with sound waves, and they were magicians made for combat. However, the tendency of their specialised magic for fighting was different. Kotona was good at search operations, detecting interference, bewitching and damage mitigation type magic rather than combat magic. Her special magic included 'Passive Sonar', 'Silent Veil' and 'Sound Bomb'. Although 'Sound Bomb' was classified as a combat magic, it also served the purpose of being an auxiliary magic to straddle the enemy rather than defeating them. She wasn't as good as her brother in direct attack magic such as 'Sound Cannon' and 'Phonon Maser'. However, when she saw that her brother was in a pinch in front of her, she quickly dealt out the combat magic she was good at. She could use 'Sound Bomb' which generated a large spherical acoustic from a selected point at a distance, although at this distance, both she and her ally would be caught in. However, Kotona and Kanata had a layer of air surrounding them for the purpose of multiplied information strengthening with sound. For both of them, information enhancements protected their bodies from the magic others used almost as if it were as natural as their Eidos skin. Harmful 'sound' to the body would turn harmless in sight of this defence. She used her entire body to shoot the magic based on such a calculation. However, Kotona's 'Sound Bomb' magic activation sequence was made useless as Tatsuya created a layer of vacuum around her, Tatsuya's ability to disable magic was genuinely surprising, and didn't expect that Tatsuya's ability was this high and led to this much stagnation which created countless chances. Tatsuya suddenly disappeared from Kotona's view. He just jumped diagonally to the sky, but Kotona's eyes couldn't adjust to his movement. It was a simple leap with only self-acceleration magic at the moment of his jump. Although there was a considerable amount of gravity that affected Tatsuya, it made him combine it with inertia neutralisation, which was very familiar to him. Furthermore, Kotona couldn't follow Tatsuya's movements ments with either her magical sense or even with her naked eye, as he hadn't used a continuous magic. He changed his direction using acceleration magic in the air. When Kotona noticed the change in magic, Tatsuya's body was already imminently close. If the opponent had been Kanata, Tatsuya would have landed a kick. However, as his opponent was Kotona, he also had a little hesitation. Tatsuya wasn't suddenly waking up to feminism. To strike at this momentum, he was concerned that he would accidentally kill Kotona's because of her delicate body. Tatsuya stretched out his hand at the same time he landed on top of Kotona, he suppressed her at once with the remaining momentum. Kotona's body fell in a moment, and politely enough to not injure her, Tatsuya laid her down on the road. When Kanata recovered enough to be able to stand up from the damage he received from Tatsuya, he saw the figure of his older sister being held down and strangled by Tatsuya. "Get away from nee-san!" He quickly picked up his fallen CAD from the road and unleashed Phonon Maser at Tatsuya. Even Tatsuya wouldn't escape unscathed if it hit him. No, if a magician had a high rank barrier magic,it might be prevented if the barrier was erected too late, it was a fatal attack for Tatsuya, had it been few months ago that was but now through his elemental sight and his powerful MCA he had copied the barrier made by Honami a magician of the sakurai series who specialise in barrier magic.

The moment the spell was fired by Kanata a multilayer anti-barrier and physical barrier formed in front of Tatsuya the spell wasted no power and it was created to just block the magic and it disappeared after blocking the sound wave. Using flash cast Tatsuya made kanata fly using a movement type of magic and when he was in the air, an air bullet was fired and that knocked out both of them.

Everyone couldn't do anything but see the flow of battle eyes wide open as the guardians assigned to the shibata family heir, the main combat force of the yotsuba being utterly defeated with Tatsuya just using a portion of his powers. Next was 20 combat magicians of the Mugura family as they all circled Tatsuya he stood there still as if they were not even a enemy worth moving are going on alert as so as they started to attack a mist flowed from were Tatsuya was

Standing and at the next instance every combat magician was frozen still. Wide area oscillation type freezing magic niflheim was activated in an instance.

Miyuki was so shocked she yelled "NO!", she has the predisposition for freezing magic and area of effect magics and even after all these years of training she could not still activate niflheim at the speed and accuracy for her who was treated as a genius by the family this was like a slap in the face. That cousin of her who until recently could not even use systematic magic was now using magic way beyond what she could do.

Maya was in a state of extreme happiness as Tatsuya effortlessly defeated the enemies he faced and not only that he did so with magic that directly counterted their magic and when she heard Miyuki's yell she was beyond happy with this result and she looked at everyone beside herself and asked "Does anyone else what to test my Tatsuya's powers?" The room went quiet as every whisper stopped and everyone looked at the heads of their respective families, "No Toushu-sama",came the reply from the head of Shiiba family, "As you will", came the reply from The head of Mashiba family. "No",The head of the Shibata family did not hide his displeasure while raising his opinion. The head of Mugura family, the head of Tsukuba, the head of Shizuka family all agreed without any fuss, the last and remaining one was the head of Kuroba house "Mitsugu sun what is you answer ?", Maya asked, amused as she could already tell what he was going to ask, "Toushu sama I would like my children to fight against him", "Oka sama!" Fumiya and Ayako both cried out at the same time Mitsugu jest sent a glare that silenced them both, "Ara Ara it seems Mitsugu san still does't want to acknowledge my son will then I leave this decision to you if they agree they can fight Tatsuya I won't stop them " Miya knew that it would be hard for Mitsugu to accept Tatsuya but she expected him to at least show the same kind of thought as the other family heads and not have his heir be defeated before everyone's eyes, "Okaa sama I would also like to fight against him..?" just as she was thinking that Miyuki's words brought her back and she stared at her daughter "why do you want to fight against him Miyuki san '' Miyuki felt as if her mother thought she was out of her mind to fight against him but she wanted to fight to remind everyone and herself she is a better magician then he is and even if he is faster she could still beat him. " I want to fight against him and show that I am still a better candidate for the head of the family even if he gained the power to use systematic magic", Miya thought about it for some time she knew for sure Miyuki could not defeat Tatsuya, before them stood a boy who was trained to be a killer from the day he could walk not as a magician but as a weapon and just now he proved his superior mind and ability to use magic in ways that no one has thought of before her was the crystallisation of the dreams of the family a being who could be the protector that they didn't have the ultimate magician and her sister's rage personified Yotsuba Tatsuya was not a simple magician he is an absolute being one that was born from her sisters rage and madness " Alright if you are sure about this then that's fine" , "Toushu sama Miyuki will also fight against Tatsuya"

Maya with an amused smile said "That's fine this will be a good gauge of strength of the children of the family", "Tatsuya I want you to use THAT magic and end this quickly I want to return to the celebration soon".

In Tatsuya's perspective this is all an unnecessary waste of time but he understood that this is for his Okaa sama and he wanted to give something for his okaa sama who believed in him when no one did and encouraged him, for her he was willing to go through this drama. From the day he altered his AMCA he has been training his magical power as he already had total control over his psion and his elemental sight along with creation allowed him to copy any magic he could see this allowed him to learn and master most of the systematic magic in a short amount of time. This time he would go all out and show everyone that he is the son of the queen of night and the demon lady of the far east Yotsuba Maya.

Fumiya and Ayako didn't want to fight Tatsuya who they both admired but they are Kuroba and their personal feelings do not matter when it comes to an order from their head of the house. Now all three of them stood in the training room along with Tatsuya who just now healed everyone of the combat magicians and kotona and kanata with a simple wave of his hand.

All of them prepared for a fight as a surge of psion came from Tatsuya's body, The tension reached its peak.

Within that period of urgency, as if time had stopped,

The world turned to 'Night'.

It was not mere darkness.

Floating within the darkness, a brilliant sea of stars.

The roof of the drawing room became a moonless, starlit night sky.

The stars flowed, becoming rays of light,

And the scent of blood suddenly filled the room.

In the next moment,

Without a sound,

That indoor 'Night' broke to show Tatsuya standing in the middle and all three of the children on the floor bleeding from their limbs the magic that Tatsuya used was….

Maya's magic 'Meteor Stream'. The Japanese name is representative of the appearance of the magic, but the English name 'Meteor Line' is more representative of the nature of the magic.

This magic which had cemented Maya's place as one of the most powerful magicians in the world, earning her the names 'Devil of the Far East' and 'Queen of Night' is a Convergence type Systematic magic which controls the distribution of light in its area of effect. Its power is especially amplified in a closed space such as rooms or tunnels.

The apparent process of this magic first forms countless tiny balls of light floating in the darkened area, which are then shot out as rays.

The attack appears like a shower of lasers, but the power of Meteor Line has no connection with the energy of the light. Even the amount of light is irrelevant.

The essence of the magic lies in forcing the redistribution of light, where the coordinates, for light to be in, are set as little balls ,and lines are then drawn between them.

Anything in the path of the space the light passes through is modified as the light is transmitted: regardless of the hardness of the object, heat resistance, plasticity, or resilience, a hole is drilled through. Not even highly transparent glass holds an optical transparency of 100%, and cannot escape the event modification that 'light has passed through' and therefore 'a hole was made'.

Looking at the logic behind this magic, rather than the phenomenon itself, it can be concluded that the magic interferes with the structural information of the object via the distribution of light, directly vaporizing solids and liquids without affecting heat or pressure; in other words a type of decomposition magic which decomposes into gas. Since it's defined as a 'ray of distributed light', it cannot be defended against via blocking, reflecting, or refracting. Since the light doesn't come from any particular direction, it cannot be shielded against by magic either. Even if one were to cover themselves with a spherical shield in all directions, it cannot alter the movement of photons and the phenomena 'light has become a line' will still be produced, resulting in a hole.

Just as it's impossible to defend against by magic which shields against physical phenomena, it's almost impossible to defend against Meteor Line with anti magic. Since it's mediated via the physical phenomenon called light, preventing it purely via anti magic such as interference over an area is extremely difficult. If one's interference strength in the single element 'distribution of light' cannot exceed Maya's, 'Meteor Line' is unstoppable. As 'distribution of light' is Maya's innate magic, interfering with it is far too high a hurdle. And once the magic has been activated, even if one tries to cause interference in the area of effect, the phenomena rewriting effect that 'light has moved' has already taken place.

Not even the Phalanx of the Juumonjis, which perfectly combines defence against physical forces with defence against magic, can hold against it. Due to that Maya stands invincible in a fight between magicians, and is regarded as one of the 'strongest magicians in the world'.

The other magic that Tatsuya could freely wield, "Absolute Creation", activated.

He backtracked through the changes in the Eidos and obtained the one an instant before any injuries occurred and then copied that.

He copied that information onto the Magic Sequence and applied it to the Eidos.

Events were accompanied by information,

And information can alter the event.

In accordance with the basic rules of magic, the injured flesh began to change.

It was regenerating back towards its uninjured state.

Rather than healing the injury, the truth called injury was being erased.

In the next instant, there wasn't even a trace of a wound on their body.

Not only that, even the bloodstains on their clothes were fading.

Now everyone was in state of absolute shock as the magic that they thought only Maya could use was performed by her son and it was a nightmare that came to life as Tatsuya already had decomposition which in itself was already too powerful to exist but to think he could use Maya meteor stream was not even something they imagined. For everyone that had secret doubts about Tatsuya's prantage now it was clear he was Maya's son.

Miya was already sure of their defeat but she never thought that Miyuki would lose without even being able to fire a single magic. But then again the magic that was used was over the top and something that no one imagined possible.

Mitsugu could no longer abject anything as he saw the power that Tatsuya wields and that now there is no stopping him.

Miya and Mitsugu could only watch as their children were healed by tatsuya.

"Now if there aren't any more people that want to Test my son, is there?" Maya asked there was no response to her question as everyone just hung their head and she took it as an agreement
"Then shall we return to the celebration hall and enjoy this happy occasion of my son getting his birth right back"

Everyone returned to the celebration hall as Tatsuya sat next to Maya, "From this day my son Yotsuba Tatsuya will also be a candidate for the next head of the family"

Now Tatsuya's potion in the family was set

He was no longer a servant,

Not a guardian,

Not a no named magician,

Now he was one of the people in the potion to be the next head of the clan

He was Yotsuba Tatsuya, son of the demon lady of the far east.