"Sorry, I misunderstood you, but you came at a bad time. Master is currently secluded, so you can only learn some simpler moves. We ourselves don't even fully understand the more profound techniques, let alone teach them to you."
Nanako seemed very helpless. She also didn't know what was wrong with her Master. Losing a duel was a big blow to a person, but it shouldn't be like this, right?
"What about the discipleship ceremony? You Inazumans should value that, right?" Lumine hadn't forgotten her purpose in coming to the Meikyo Shisui-ryu dojo.
"Oh, right, the discipleship ceremony is very important... Never mind, I'll go ask Master for you. I don't know if he'll see you." Nanako finished speaking and walked alone towards Domon's room.
"Master!"
"Nanako, don't look for me anymore."
"But Master, someone is here to become a disciple!"
As her words fell, Domon, who was in the room, paused. Then Nanako heard footsteps.
Clatter!
The door was pushed open, revealing Domon's bloodshot eyes and trembling hands.
"Master, you're finally willing to come out!" Nanako seemed very pleasantly surprised.
Domon, however, said expressionlessly: "Where is the person who wants to become a disciple?"
"Over there!"
Domon looked in the direction Nanako was pointing. The golden-haired girl in foreign clothes and the Emergency Food floating in mid-air came into his sight.
The golden-haired girl was nothing, but Paimon was the main thing. The moment he saw this little guy flying in the air, Domon's mind was filled with the cries of a swallow.
The starry cloak gradually transformed into black wings, while the body became a white torso.
"Ah ah ah ah!"
Under everyone's shocked gaze, Domon fiercely drew the katana from his waist, then made the exact same starting move as Shiki and slashed at Paimon.
"Eh eh eh!" Paimon let out a terrified shriek and quickly hid behind the Traveler.
Seeing this, Lumine also pulled out her wufeng sword and blocked Tejima's attack.
Clang!
Sparks flew, and Domon was knocked back several steps, then immediately became furiously enraged, showing no demeanor of a school head at all.
"Why, why, why!!! Why can't I use it!"
Domon threw away the katana in his hand. It was fortunate that the Tenryou Commission used specialized Vision medical personnel, otherwise, with Domon's injuries, blood would have been splattering everywhere by now.
"What can't you use?" Lumine asked in confusion.
Nanako looked at her greatly changed Master and sighed: "Alas, what else could it be? Of course, it's that Shiki's secret sword, Tsubame Gaeshi. Master was defeated by that move."
"That move, counting everything, the opponent has only used it twice. Perhaps it has been used elsewhere, but it has only been exposed to public view twice."
"At that time, Master's injuries were identical to Sir Fujiwara's. After he healed, Master locked himself in his room..."
"So Mr. Domon is like this because of that move called Tsubame Gaeshi?" Paimon asked.
To be honest, Paimon was a bit confused. A single sword technique, could it really drive a person completely insane?
"Probably... I'm sorry you had to see something unpleasant..."
Nanako said as she helped Domon to a chair. The latter slumped motionless in the chair as if his soul had left his body.
"You two should not become disciples. You've seen the situation of the school; it's really not good."
"It's okay." Lumine shook her head: "If you don't mind, can you tell us about Tsubame Gaeshi? Perhaps I have a way to help your Master!"
"Of course, it's not something that can't be told anyway." Nanako nodded. As for helping Domon, she didn't have much hope for the Traveler.
"Tsubame Gaeshi is a high-speed sword technique that can rapidly deliver three slashes from different directions at a speed imperceptible to the naked eye, thus making it impossible for the opponent to dodge."
"But it's easy to say and hard to do. In my eyes, those three slashes were almost simultaneous, even though it looked like only one sword swing."
"As for why it's called Tsubame Gaeshi, I don't know."
Nanako's words made Lumine fall into deep thought. And at that moment, Domon, who was slumped in the chair, spoke.
"Not almost, it is simultaneous. Because Tsubame Gaeshi is a move used to cut swallows."
"Swallows can dodge attacks by sensing air vibrations, and a sword is just a straight line; it cannot cut a swallow that can move up, down, left, and right."
"So, to cut a swallow, this line must become two: one to force the swallow to move, and one to cut the swallow."
"However, this is not foolproof. To ensure a hit every time, another line must be added, making it three, thus blocking the swallow's escape route."
"Finally, these three lines must appear at the same time, otherwise the swallow will sense the air vibrations and dodge them."
"This, then, is Ryougi's secret sword, a sword technique that cannot be dodged."
The maddened Domon, surprisingly, was very clear about Tsubame Gaeshi, even understanding its original intention, as if he had created this sword technique himself.
Paimon listened with a blank expression. Her small brain capacity couldn't allow her to understand Domon's words.
Nanako somewhat understood, but she grasped one thing: the three "lines" appeared without any temporal distinction.
However, a huge wave surged in Lumine's heart. She had once traversed many worlds, and Teyvat was just one of them.
In other worlds, Lumine had heard of a theory called dimensional folding, which involves folding events that occur at different times together to achieve the phenomenon of happening simultaneously.
However, this was only a theory. Across many worlds, no single world's technology had been able to achieve this.
Yet, on this ancient continent of Teyvat, someone had caused a dimensional folding phenomenon with pure skill. How could this not shock her?
"Phew... truly astonishing..." Lumine exhaled deeply. The things she had learned today were truly too astonishing.
It seemed she had previously underestimated the strength of this Two Rituals consultant. Tsubame Gaeshi, created by dimensional folding, was simply a dimensionality-reduction attack among mortal sword techniques!
No wonder Domon went mad. To have witnessed such a miraculous sword technique and still be able to grasp its principle was already quite remarkable.
"Mr. Domon, you don't need to try to use this sword. This is a realm that mortals cannot reach."
"Mortals? What about Shiki? Why can she use it!?" Domon stood up from the chair and shouted.
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