Next, since Shenhe was pregnant and not suited for such high-intensity exercise, he let the unconvinced Eula and Sara give it a try. The result was identical; regardless of whether it was Eula's Glacial Illumination or Sara's Subjugation: Koukou Sendou, they were all effortlessly copied by Miyashiro.
Furthermore, both of them could tell that the moves Miyashiro used had absolutely no soul—no personal insight or thought behind them—yet he could still easily parry all of their sword techniques. This sense of dissonance made them feel extremely annoyed. After only a few exchanges, they gave up on the sparring and went to sulk with Ayaka.
Eula returned to her spot, crossed her arms, and huffed, "Your eyes are just too shameless. I've been studying sword techniques since I was a child, constantly honing them over these many years and putting in countless amounts of sweat. Now, you've learned them with just a single glance. I'll make a note of this grudge; you'd better watch out tonight."
Watching Eula's pouting, stubborn, and tsundere expression, Miyashiro felt as if a pair of small hands were tickling him, stirring up his interest.
Seeing this, Miyashiro hurriedly went over to soothe and comfort her. "Alright, this is the Sharingan's insight and copying ability. It can see through and copy an opponent's movements and techniques. Even if it's an elemental technique released by a Vision holder, as long as one possesses the corresponding elemental power, it can be copied."
"It sounds very broken, but in actual combat, if you are dealing with an opponent stronger than yourself, this move isn't very useful. After all, the Sharingan can only copy techniques; physical fitness and reaction speed cannot be copied."
"Take Shenhe, who has innate divine strength, or Sara, who possesses the Tengu bloodline, for example. Your physical capabilities are beyond the reach of ordinary people. Even if one learns your techniques, whether they can block them or react in time is a completely different matter."
After hearing Miyashiro's explanation, everyone finally breathed a sigh of relief. Losing to their own man was not shameful. Fortunately, the Sharingan could only be awakened by those with the Uchiha Clan bloodline. This meant that in the future, anyone possessing the Sharingan would be Miyashiro's descendant and their own junior.
Thinking of this, everyone felt relieved. As long as such a good thing stayed within the family, it was fine.
Ayaka then asked, "What about the other ability?"
Miyashiro smiled and glanced at Shenhe, and Shenhe immediately recalled the genjutsu Miyashiro had constructed for him earlier.
Miyashiro replied, "Visual genjutsu, as the name implies, is a technique that releases hallucinations to the enemy through these eyes. However, there is a prerequisite: the opponent must make eye contact with the Sharingan. Of course, there is a way to counter this move: simply don't look."
This lighthearted remark from Miyashiro earned him eye-rolls from everyone. It was easier said than done; were they supposed to close their eyes in the middle of a battle? That would be too disadvantageous.
However, Sara noticed something and asked, "Master, you just mentioned visual genjutsu. I can understand genjutsu, as there are many yokai in Inazuma's history that use deceptive techniques, but since you specifically pointed out 'visual,' does that mean there are other methods?"
Miyashiro nodded and said, "That's right. As long as a member of the Uchiha Clan awakens the Sharingan, it indicates that he has a certain potential in genjutsu."
"The conditions for casting genjutsu actually target the five senses: sight, hearing, smell, touch, and taste. Visual genjutsu is an innate ability of the Sharingan and is also the most common type of genjutsu."
"Of course, you can also research genjutsu for the other four senses through your own acquired efforts. Compared to visual genjutsu, genjutsu involving the other four senses is more covert."
"The essence of genjutsu lies in the word 'reality.' Especially when dealing with enemies, whether the constructed illusion can prevent people from noticing anything amiss and make the opponent believe they are in a real world is of paramount importance. In this way, the enemy caught in the genjutsu becomes a Fish on your chopping block, ready for slaughter."
"A true master of genjutsu is quite terrifying. Currently, the strongest genjutsu user in Teyvat is surely Lesser Lord Kusanali. The power of dreams she possesses can even construct a vast world capable of accommodating tens of thousands of people living together without them noticing anything amiss."
Sara said somewhat unconvinced, "Master, I believe my eyes can break through all illusions."
Miyashiro chuckled upon hearing this. "So, you want to try it again?"
Sara looked at Miyashiro, who was looking at her with a wicked smile, and then at the pair of scarlet Sharingan on his face. She immediately lost her confidence, lowered her head, and remained silent.
Miyashiro sighed and said, "I believe in your strength, Sara, and I believe your willpower is beyond that of ordinary people. But in the face of genjutsu, once you are caught, it doesn't matter how firm or strong your willpower is. The key lies in whether you can quickly realize that you have fallen into a genjutsu."
"After all, once you are caught in a genjutsu, your physical body in reality is left ready for slaughter. If you cannot break the genjutsu in time, by the time your body suffers a fatal wound, it will be too late to break it."
"Let's take you as an example. Your obedience to my orders and Ei's orders is absolute. At this time, if someone were to exploit this, and in the illusion, the version of me or Ei that they constructed issued you a controversial and unreasonable order, would you be able to realize that you are in an illusion? In an uncertain situation, would you dare to draw your blade and resist me or Ei?"
Sara's expression changed immediately upon hearing this, and she instantly realized the severity of genjutsu. For someone like her, this was practically a psychological attack.
Miyashiro continued, "Sometimes, the constructed illusion will be more beautiful than reality, making you sink into it and not want to leave. For example, in the illusion, the Lawrence Family mends their ways and becomes the most prestigious family in Mondstadt, deeply loved and respected by the people of Mondstadt."
"Or for example, Ayaka, your parents are still alive, and under the joint efforts of your parents and your brother, the Kamisato Clan becomes the head of the Tri-Commission."
"And again, for example, Shenhe, your mother never fell ill, your father was not corrupted by the remnants of a God, and your family of three is reunited, enjoying domestic bliss."
Miyashiro's words struck directly at the weaknesses deep in everyone's hearts. If someone really used such a genjutsu to lure them, could they hold out? This left them feeling uncertain.
After all, there are not many people in Teyvat who are proficient in genjutsu; it feels somewhat like a dimensionality-reduction strike.
Seeing that the atmosphere was about right, Miyashiro smiled and said, "Alright, alright, don't think too much about it. At least for now, the person who possesses such a bug-level thing as the Sharingan is your man. Even if someone obtains it in the future, you will be their elders, so they wouldn't use this thing on you, right? That's enough information for today; you should go back and digest it well."
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