Anime/Manga: Bankai Starting with Demon Slayer

Just then, a childish greeting rang out.

Reborn, dressed in a black suit and wearing a top hat, appeared at the end of the corridor at some unknown time.

A green lizard named Leon was perched on the brim of his hat, watching the bird with curious eyes.

"Your name is... Reborn, right?" Asuka put down her teacup and greeted the man Tsuna had mentioned as the world's number one assassin. "Have you finished dealing with things on Tsuna's end?"

"Chun Gang is still fast asleep at home, don't worry about him."

Reborn walked over from the other end of the corridor, sat down next to Asuka, and removed his hat to greet the two ladies behind him: "Good morning, Ms. Shinobu Kocho and Ms. Nemuru Kurotsuchi."

“I have already heard from my foolish disciple... He received your kindness in your world and is very grateful.”

“Oh, Mr. Reborn is such a gentleman.” Shinobu Kocho nodded slightly. “It is only right for adults to take care of children. There’s no need for such formalities.”

Nie Yinmeng nodded slightly, turning her attention back to the task at hand.

"What brings you here so early in the morning?"

Asuka had no intention of chatting idly. Knowing that although the other person looked like a child, he was actually an adult cursed just like himself, she went straight to the point.

“…Mr. Death is certainly straightforward, so I’ll just get straight to the point.” Reborn reached up and adjusted the brim of his hat: “Where did that thing around your neck come from?”

Asuka glanced down at the pacifier and shook her head helplessly: "To be honest, I'm not quite sure myself."

"After I took Tsuna and Lambo through the portal, this thing inexplicably appeared and bound itself deep within my soul, sealing away most of my power..."

"Reborn, I think you're in a similar situation to me. Is there any solution to this?"

Reborn was silent for a moment, his small hands gripping the yellow pacifier on his chest.

"Mr. Death, have you heard of the curse of the Arcobaleno?"

Then, Reborn took the initiative to tell Asuka about the cruel curse hidden in the Mafia's top secrets.

"In the world of the Mafia, there are seven chosen 'strongest'... We are cursed by some kind of curse from the world, our bodies have stopped developing, we are forever in the position of infants... and we have been given the Rainbow Pacifier, one of the guardians of 'Seven to the power of three'."

Reborn succinctly explained to Asuka the origins of the Rainbow Children, the weight of the curse, and the seven attributes of the Dying Will Flame—

Sky, storm, rain, clear sky, thunder, clouds, fog.

After hearing all this, Asuka was actually only vaguely aware of it.

He only knew that the death flames on Tsuna's body were a kind of power similar to Fullbring and spiritual power, but he didn't know that it could be divided into such a detailed category.

Asuka shrugged: "It sounds like some kind of unscrupulous boss forcing employees to sign lifetime contracts... But the problem is, I'm not even from this world, so why am I being labeled with this thing?"

“That’s exactly what I’m most concerned about.” Reborn looked at Asuka with a serious expression: “There are only seven rainbow pacifiers, each corresponding to one of the seven attributes of the Death Flame.”

"Last night I contacted... the guardian of the Sky Pacifier, and together with some acquaintances, we spent the night researching ancient documents and related materials about the Arcobaleno..."

"Although I don't know if my guess is correct, you are very likely to be the eighth attribute, outside of the seven attributes."

"The eighth attribute?" Asuka raised an eyebrow.

“That’s right, you come from another world. Your soul and the energy within you are not bound by the world’s foundation, and they are too powerful... It’s like a virus or a bug has appeared in a system that is already in perfect circulation.” Reborn analyzed, “This pacifier is the product of error, an attribute forcibly manifested by the world’s rules.”

Shinobu Kocho chuckled softly from behind, covering her mouth: "Looks like being too powerful can be troublesome, huh? Has the World Grandpa set his sights on you?"

After a moment of silence, Asuka asked seriously, "Now that you have a suspicion, is there any way to resolve it?"

"I'm sorry about that," Reborn shook his head. "I don't know how to break the curse on the Rainbow Children."

I......!!

But the next second, Reborn added, "However, I know a fellow Arcobaleno."

"Although that guy has a terrible personality and is a madman, when it comes to research on the Death Flame and the Rainbow Child, no one in the world can surpass him."

"The Rainbow Child of Thunder - Verdi".

Chapter 844 The Method to Remove the Rainbow Curse

Two days later, at an underground research base located on the outskirts of Namimori Town.

The air was filled with the smell of ozone mixed with various chemical reagents. Huge robotic arms moved silently through the air, and countless electronic screens flashed with complex data streams.

This is the private research institute of the mad scientist Verde.

In the very center of the laboratory, a green-haired baby wearing a white lab coat and thick-rimmed glasses is sitting on the back of a crocodile, holding a tablet computer and recording something.

The green lightning pacifier on his chest stood out conspicuously in the dimly lit laboratory.

“Reborn, it’s rare for you to contact me first.”

Verdi looked up, about to say something indifferent and meaningless.

My eyes were immediately drawn to the black and white pacifier on the bird's neck.

His eyes immediately blazed with a 'scientist's light' that Asuka recognized immediately: "Oh... oh oh oh! Is this the unknown eighth attribute pacifier you told me about in the radio?! It's an unbelievable specimen!"

Before Asuka could even say hello, Verdi had already manipulated the robotic arm to pull Asuka into a cylindrical, transparent scanning cabin.

"Hey, just wait a minute—"

"Shut up! Don't interrupt my data collection!" Verdi trembled with excitement, his fingers flashing across the control panel: "This cell activity...this bone density and heart rate...is this guy even human??"

"And this deathly flame... no, this isn't ordinary deathly flame... this is a composite energy I've never seen before!!"

"Fantastic! Reborn, you bastard, you've finally proven useful! This is incredibly exciting! This is absolutely a world-shaking discovery!"

As this mad scientist devoted himself to a comprehensive study of the birds, Nemure, who had come with the birds, also stepped forward to the control panel.

She stared blankly at the fluctuating data streams on the screen, a sharp glint of a technician flashing in her indifferent eyes.

“The scanning frequency setting of the spirit wave band you are using here... or what you call the Death Flame band is incorrect.” Nemuro suddenly spoke, her voice cold: “Lord Asuka is not a simple Grim Reaper; the energy within her body has multidimensional folding characteristics.”

"If you only use the spectral reflection of the three-dimensional physical layer for measurement, the data you get will have a 100% error... that is, it will be completely wrong."

Verdi's hand, which was typing on the keyboard, suddenly stopped. He turned his head in disbelief and looked at the woman who was dressed in a Shinigami uniform, with a beautiful face but no emotion.

"And who are you? How dare you interfere with my research?" Verdi scoffed. "I am the genius Verdi..."

“I am Nemure.” Nemure replied calmly, “Based on the data just now… if you continue to increase the output power according to the original procedure, the test chamber will explode in one minute.”

"I'm very sorry, but please forgive my bluntness, your method of analyzing spiritual energy circulation is too primitive."

As she spoke, she casually wrote some formulas and numbers in the notebook in front of the control panel and pushed it to Verdy.

Verdi frowned and quickly mentally calculated the formula proposed by Yinmeng.

The next second, his eyes widened instantly.

"It's really like that?!" Following Yinmeng's suggestion, Weldy modified the parameters, and the garbled text on the screen instantly transformed into a clear energy circuit diagram.

This usually arrogant and disdainful mad scientist looked at Neonmu with a completely different gaze at this moment.

It was a kind of fervent enthusiasm, like finally finding a kindred spirit in an endless academic desert.

"Genius! Your thinking is a leap forward that transcends time!"

Verdi slammed his fist on the control panel excitedly: "How did you derive this formula? What if you combined your theory with my weapon development technology...?"

"I'm just standing on the shoulders of giants," Neonmu said truthfully.

Her body contains a large number of scientific research formulas belonging to Nekorea, known as 'spiritual intelligence', which can basically simulate 70% of the other party's thinking, so answering these basic questions is nothing.

“We can try to create a reverse energy field and force this unknown pacifier to reveal its core rules by simulating the pressure of the external realm.” Nie Yinmeng’s speech speed increased significantly, and she had obviously entered a research state.

"Great idea! I'll go adjust the magnetic pole settings of the inversion field right away!"

Watching the two research fanatics begin their profound technical exchange, oblivious to everyone around them, even occasionally bursting into unsettling laughter...

The bird trapped inside the scanning cabin and Reborn standing outside both fell silent.

"I mean... is this person really okay?" Asuka looked suspiciously in Verde's direction. "I've experienced quite a few dangerous methods from scientists, and I have some reservations about this kind of cabin equipment."

The lizard on Reborn's head stuck out its tongue, and he said helplessly, "There shouldn't be any problems..."

Just as Nieyinmeng and Weildi joined forces to launch a new round of in-depth testing.

Om-!

The entire underground research institute suddenly trembled violently.

The surrounding lights began to flash wildly, and the instruments emitted piercing alarms.

"What's going on? Is the energy output overloaded?" Verdi immediately checked the data, only to find that the equipment was working perfectly.

The real abnormality is in people.

Inside the scanning cabin, the transparent pacifier on the bird's neck suddenly burst into a dazzling light.

The light had no specific color, yet it seemed to refract all the colors in the world.

At the same time, Verdi, who was standing in front of the control panel, suddenly groaned and clutched his chest in pain.

The green lightning pacifier on his chest was flashing at a frenzied frequency and uncontrollably releasing large amounts of green lightning-attribute death flames!

"What...what's going on?!"

Verdi stared in astonishment as the light from the two pacifiers intertwined in the air, creating a strange resonance.

He tried to explain everything that was happening before his eyes using scientific principles, but found that his mind was blank: "My Thunder Pacifier is actually resonating with that pacifier of unknown attribute... How is this possible! The Foundation System is a completely independent closed loop, and this kind of forced resonance across attributes has never happened before!"

Under the influence of resonance, Verdi even felt a slight loosening of the life force within his body that had been stagnant due to the curse!

He turned and stared at Reborn, shouting, "Reborn! Come here!! Step into the energy field's coverage area right now!"

Although Reborn was unclear about the specifics of what had happened, he noticed the unusual tone in Verdi's voice.

Without hesitation, he strode quickly from the doorway and entered the central area of ​​the laboratory.

The moment Reborn stepped into that area, the yellow pacifier on his chest seemed to be summoned by some powerful force, and it burst into a dazzling yellow light!

The yellow flames of sunshine, the green flames of thunder, and the unknown chaotic light emanating from Asuka's chest...

The three elements intertwined in mid-air to form a perfect triangular energy cycle!

Within this cycle, Reborn clearly felt...

The Rainbow Child Curse, which had bound his body and soul like shackles, was actually extracted as a wisp of solidified black energy under the guidance of Asuka's pacifier!

"The energy of the curse... is being broken down?" Reborn's perpetually calm, baby-faced expression finally betrayed his shock.

Asuka also felt the pacifier on her neck was like a black hole, frantically absorbing the curse power emanating from Reborn and Verde, swallowing it into the unfathomable black and white abyss.

Verdi stared at the various indicators on the screen that had exceeded the critical values, his eyes behind the glasses bloodshot with excitement.

His body trembled violently, not only from the energy impact of the resonance...

It was also because he realized something that could overturn the rules of the entire world.

He looked at the birds, then at the pacifiers on his and Reborn's chests that were gradually calming down but becoming even purer, and murmured to himself with a mixture of excitement and disbelief—

"I think... I've found a way to break the Rainbow Curse..."

Chapter 845 Method to Activate the Dying Will Flame

After several days of research, Verde came up with a solution that was both simple and complex.

First, he and Nemuro would design a device that would allow the pacifiers of the seven Rainbow Children to release flames simultaneously, flowing and resonating within them.

At the center of this device, he would insert a black and white pacifier belonging to a bird as the core, linking the seven attributes together to create an endless cycle.

In this way, the energy required for seven cubed can be permanently circulated within this device, and they will no longer have to endure the curse of the Rainbow Children.

But the complexity lies in the fact that the birds need to bestow upon the black and white pacifiers a massive amount of energy—more than all seven attributes combined—in order to stabilize the balance between them.

That's where the problem lies.

If it were Asuka's original power, he could easily do it, and even going a step further wouldn't be impossible, but now he is limited in many ways.

Therefore, the most urgent task is to teach Asuka to solve this problem using only her inner power, the Death Flame, without using spiritual energy.

Verdi had no good solution to this; he wasn't a good teacher.

While Reborn had his own special training methods, they were far too rudimentary for Asuka, who had already experienced life and death...

In the end, it was Asuka who remembered someone.

That girl, Chrome.

Or rather, the man inside her body, Rokudo Mukuro.

During the battle of mist, the man displayed the so-called power of the Six Paths of Reincarnation, especially the unpredictable Hell Path...

The despair and devastation it exuded were very similar to the atmosphere that birds had experienced in hell.