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(Sometime earlier)

With a piercing roar, the captains moved, except for one—Yamamoto Genryusai Shigekuni. He observed the situation from a distance.

The man had lived for a long time and couldn't accept the existence of so many unidentified entities, all seemingly so powerful without reason.

In this world, power comes from Reiryoku (spiritual energy); it's absurd to be powerful without using it.

"Kyoraku and Ukitake are also fighting... or pretending to, as usual..."

"Komamura... I'm not surprised, but it's strange. I understand that Soifon and Kurotsuchi Mayuri haven't joined from the start, but where are Kaname, Ichimaru, and Urahara?"

Yamamoto watched the battles from afar, growing irritated. The green monster that started everything was being delayed by several lieutenants, yet some invader figures were walking through different places without restrictions.

"Fools!"

Yamamoto decided to deal with them personally, and later, he would reprimand the captains who did not fulfill their duties.

"...?"

However, he sensed the release of Unohana's Reiatsu and stopped. She was the only member of the first Gotei 13 still present. If she participated, there would be no need for Yamamoto to move.

Still, Yamamoto's irritation did not diminish. He felt deceived—the child Kuchiki Rukia had helped was a liar, an imposter. His power alone was absurd, and he had so many strong allies—enough to face the captains of the Gotei 13!

"That human child is a danger..."

Yamamoto Genryusai felt his anger building up. Allen must have tricked Kuchiki Rukia to gain his powers on purpose. Then, he must have pretended to be an ordinary human to infiltrate the Seireitei and start an invasion.

Someone like Allen was a huge danger to the Soul Society, no, to the entire world!

But then the situation changed again. Unohana wasn't fighting. It seemed she had surrendered to the enemy. Something like this was unheard of, but before Yamamoto could process it, a Hollow's monstrous Reiatsu emerged.

"They even brought in a Vasto Lorde?! It's been how many centuries since anyone dared such a mockery of the Gotei 13?!"

Yamamoto went to intercept the Vasto Lorde, who strangely ignored all the shinigami and arrived at the place where Kuchiki Rukia was locked up.

"Why?" Yamamoto paused in midair hiding his Reiatsu to understand the situation, as it seemed the hollow was here to attack the invaders. Yamamoto's eyes locked onto Allen. "This creepy feeling... it reminds me so much of an old enemy, but he should be dead by now."

After a moment, Yamamoto saw all the previous events, Allen defeated the Vasto Lorde, and Unohana had left the Gotei 13. Yamamoto sighed losing a shinigami who had proven her loyalty to the Seireitei for so many years was a hard blow. Besides... Allen was able to defeat a Vasto Lorde so easily confirmed his previous theory. For the sake of the world, Yamamoto needed to use all his power to defeat Allen.

Yamamoto stared at Allen with a stern look. This wasn't the first time the Seireitei had been attacked and its captains had been incapacitated. It wasn't the first time Yamamoto had faced a crisis, and yet, no matter the era or conditions, the man was still standing...

---

(Meanwhile, in the skies, beyond many barriers)

An old bald monk with large, round eyes, eyes that seemed to see the souls of all things, observed from above.

His name is Hyosube Ichibe, the leader of the Zero Division, the Shinigami... if one could call him that, he is the strongest member of the royal guard and is said to be more powerful than Yamamoto himself.

Ichibe is a tall, robust man with thick eyebrows and a long black beard. He wears the typical captain's uniform; around his neck is a rosary with red stones, and he wears platform sandals.

This man is special. Everyone in the Zero Division is famous for creating various concepts added to the world. In the words of the current Aizen, the fact that the royal guard can add new concepts to the world is further proof that the Spirit King didn't do a good job.

Back to Ichibe, he was responsible for naming every zanpakuto that exists... every zanpakuto, including those of Yamamoto, Urahara, and even Aizen. However, this man looked down at the Seireitei with confusion...

"Yo yo yo~ it seems something absurd is happening down there!~"

Behind him stood a man with sunglasses and a light, modern tone to his voice. His name is Nimaiya Ōetsu, a member of the Zero Division, also known as the God of Swords.

"That's right, Oetsu... many people with powers I've never seen before powers that the King didn't create, are attacking the Seireitei..."

Ōetsu is a man of somewhat short stature, with thick lips, dark skin, and thick black hair. He wears a variation of the Shinigami shihakushō, with a green inner garment at his neck and a shortened hakama that exposes his ankles. Over his shihakusho, he wears a variation of the captain's haori, a long, padded coat with a high collar, and the symbol of the Royal Guard on the back.

"I didn't name any of those zanpakuto..."

"...What did you just say?!"

Upon hearing Ichibe's words, Ōetsu stood still, unable to believe it. He then investigated the Seireitei's situation and realized something astonishing.

"I didn't forge that zanpakuto..."

The title "God of Swords" is given because all Asauchi, the base versions of each zanpakuto, are forged by him. Once a Shinigami molds their Asauchi, it becomes their unique zanpakuto. However, Allen's zanpakuto was neither forged by the God of Swords nor named by Hyosube Ichibe.

"Old bearded man, what's going on?"

"I don't know... none of this makes sense..."

...

(In the present)

The oldest and most powerful zanpakuto, which is said to have the most devastating offensive power of all. Aizen once said that Yamamoto was capable of facing two captains and putting them in a tight spot with ease.

As the founder of the Gotei 13, he Is the strongest Shinigami in history, but this was questioned with the appearance of the Zero Division. However, without a doubt, he has been an unbeatable man, both for enemies and allies.

Feeling Yamamoto's power, all the captains widened their eyes. The captain commander could wipe the floor with countless enemies on the battlefield, but this is not how war works. Having the main trump card used early on can be considered a failure of the others.

Rukia's eyes widened as she observed Yamamoto's monstrous power, which was large enough to overwhelm all the captains in their base states.

Allen felt Rukia's hand tightening on his clothes. This situation made him feel a bit humiliated, as—who was he? Could someone so easily frighten a woman under his protection? "NO!"

"Banshō..."

Yamamoto began to unsheathe his zanpakuto. The heat surged suddenly, and the pressure exerted by Yamamoto was unleashed.

Allen grimaced in disgust and summoned his zanpakuto. It was peculiar since it still held the distinctive Clown Crown cross design, despite being a katana, not a longsword.

"Midway in the journey of our life, I came to myself, in a dark wood, where the direct way was lost."

Allen closed his eyes, and when he opened them, he released his zanpakuto.

"Condemn my desire. Divine Comedy... Canto I of the Inferno... Dark Wood..."

...

Yamamoto's eyes widened, halting his attack. He found himself inside a cave, unable to comprehend what had just happened. But the man had lived for so long that he didn't lose his composure and didn't panic.

First, he checked the air and realized that this place was neither the Soul Society nor the Human World. It resembled the Human World but was different.

Yamamoto checked his own power. He could still use his zanpakuto and Reiatsu.

"It's a way to buy time."

This definitely wasn't the first time he'd been trapped somewhere, and certainly, it wasn't something unfamiliar to him.

"One of the fundamentals of trapping an opponent is your own power. If the difference is too great... you won't be able to hold it for too long..."

Yamamoto was a patient man. He could wait, but he decided to search for a way out.

When he left the cave, he was in a dark forest. In front of him was Allen, which surprised Yamamoto, who hadn't expected him to be foolish enough to appear before him...

"What are you trying to do?"

"Trying? I'm already doing it..."

Allen smiled...

...

MJ – I'm lost, I'd like an explanation...

Raven – Don't worry, here we have the bastard traitor to enlighten us...

Annie – Tsk, I don't even know why Allen gave him access back...

Aizen – I can feel the collective hatred towards me, hehe, that's fine, I deserve it.

Aizen – As for the explanation you want, first I'll tell you about the zanpakuto. These weapons are quite versatile. Some transform, like Zabimaru of Abarai Renji and Senbonzakura of Kuchiki Byakuya. Some have elemental powers, like Kuchiki Rukia's and Yamamoto Genryusai's... of course, their function varies depending on the shinigami's ability. However, there are many types of zanpakuto, including strange ones like Kurotsuji Mayuri's and Kyoraku Shunsui's...

Aizen – Focusing on the latter, his zanpakuto is very peculiar. Its abilities are based on Japanese children's games, something very peculiar, because it makes you wonder if those games didn't exist, or if Kyoraku had been born in another country, would his zanpakuto be different?

Tony – Are you saying that the power of a zanpakuto is influenced by a shinigami's knowledge and past?

Atena – That makes sense... wait, does that mean that Allen's silver zanpakuto is also influenced by his past and knowledge?

Aizen – That's correct... but I'll let His Majesty explain it...

Nikky – His Majesty?

Diana – It's not me... it must be Gwen.

Gwen – Huh? Me?

Natasha – Mmm, technically, since Allen is a King now... his wife, or... wives, would become Queens and consorts... I get the point, but it's a bad joke... bastard...

Natasha also hated Aizen for his betrayal. Gwen blushed and almost decided not to do it, but remembering how she felt when Unohana tried to undermine them made her stop doubting.

Gwen – Assuming what Aizen Sosuke said is true, Allen's Divine Comedy is based on Dante's Divine Comedy of Hell...

Gwen – The Divine Comedy consists of 100 cantos, which explain Dante's journey through the three realms, with 34 cantos for Hell, 33 for Purgatory, and 33 for Paradise...

As she spoke, Gwen's eyes widened as she understood the implications of that zanpakuto.

Gwen – Allen mentioned the Dark Wood, the first canto of Hell...

MJ – Hey, sis, you're not going to tell me that sword has 100 different techniques, are you?

...

"Canto I of the Inferno... Dark Wood..."

Yamamoto, sensing a bad premonition, attacked Allen, but he used his dark zampakuto to block the attack, surprising Yamamoto. Even though it wasn't his full power, a regular captain would have been cut in half with that level of power.

"I'm not your opponent here..."

Allen punched, and Yamamoto blocked it. He was surprised, as it wasn't common to see someone skilled in hand-to-hand combat.

Three shadows appeared behind Allen, a leopard, a lion, and a wolf.

...

Gwen – Dante encountered three creatures that prevented him from passing... The leopard represents lust or deceit. The lion represents pride or violence. The wolf represents greed or avarice...

...

"Yamamoto Genryusai, you are a cold man when dealing with your opponents, in your case, the lion would be your opponent..."

The zanpakuto that have abilities that impose themselves on others are complicated to deal with but always have rules, so Yamamoto focused on figuring them out.

Yamamoto narrowed his eyes and looked at the shadows for a moment."I see, I won't be able to leave here until I defeat it..."

"Yeah... but keep in mind that the lion's power is proportional to the violence and pride you've exerted in your long life..."

Allen gave a lazy look and began to disappear... not a common old man...

Yamamoto looked at the three shadows, and two of them disappeared. At the same time, the ground trembled as a giant creature with the form of a lion appeared on the horizon, so large that it reached the clouds in the sky.

Yamamoto could hear the screams of his enemies, the difficult decisions of his past, and his actions until now.

– No, don't do it!!

The time Yamamoto cut a friend because he had broken the law...

– It's decided. Today, we must sacrifice the souls of Rukongai to maintain the balance.

The time he had to burn innocent people with his own hands to maintain the balance of spiritual energy between the three worlds.

– Yamamoto Genryusai Shigekuni?!

The time he eradicated all the Quincy he found, including some who desired a peaceful relationship with the shinigami, but because of his power, there was never a way for that to happen.

Yamamoto had been the judge, jury, and executioner of countless things. His goal, and the goal of the entire Seireitei, was to protect the world. For that, he had never hesitated to shed the blood of others, and in this case, he wouldn't hesitate to kill Allen and Rukia.

That's why the lion of pride and violence in "Canto I of the Inferno" is as big as a mountain.

Yamamoto grabbed his zanpakuto and didn't hesitate, "Bankai: Zanja no Tachi!"

...

Allen looked at his silver zanpakuto. The blade seemed to have lost its edge, but the cross on its side denoted a mystical glow. As MJ said, Allen had a terrifying number of 100 unique techniques in his silver zanpakuto. But it wasn't that amazing. He couldn't use more than one "Canto" at a time, so while Yamamoto was in the Dark Wood, Divine Comedy would be unusable...That's why it became an opaque blade. Also, it's not like he could use all the other 99 cantos right now.

Rukia opened her eyes in disbelief, unable to understand how Yamamoto could disappear in an instant.

Allen smiled and leaned closer to her face, "Rukia, don't you want to have a little faith in me? You're going to make me cry..."

"Shut up!" Rukia blushed even more intensely this time.

...

"Yama-ji!!"

Kyoraku shouted as his Reiatsu soared, pushing Kratos back. He was surprised, although he hadn't been taking the fight seriously, Kyoraku's strength increased tenfold with that last blow.

"Kratos grabbed his axe, and it lit up as he threw it at Kyoraku. He used his zanpakuto to block the axe.

Kratos buried his hands in the ground and then lifted the earth as if it were a carpet. With this movement, he destroyed many buildings and created a wave of earth towards Kyoraku; He used his zanpakuto to cut the wave of earth that was heading towards him, and from the sky, Kratos fell with a scream.

*Auge*

The axe and the zanpakuto clashed in the sky.

"...!" Kyoraku surprisingly resisted the attack and looked at Kratos with a cold gaze, "Please, let me pass..."

"I can't..."

Kyoraku got angry and attacked Kratos of his own will.

"Ukitake!"

Ukitake came out of his stupor and knew he had to go find his sensei. However, he barely took two steps before being surrounded by giant water orbs.

"I'm sorry, you heard the old man, you can't go..."

Percy smiled and attacked Ukitake. As the son of the sea and a demigod, he can control the water

"Sensei..."

Ukitake regrets leaving Yamamoto alone. But it wasn't his fault. For the shinigami, Commander Yamamoto Genryusai was an impregnable figure; they couldn't imagine a scenario where he would be killed just like that.

"Dammit!"

Komamura also pressured Thor, sending him flying with the increase of his power upon sensing Yamamoto's Reiatsu disappear.

At the same level as Kyoraku, Komamura was affected by this...

...

"Well, what will you do?"

Unohana was being questioned by the blonde woman. However, she had a look of pity and some sadness. But there was no doubt in her eyes that she was on Allen's side.

"I don't see what you mean, I also made my decision, and Shigekuni is a warrior. His death is not something to lament; it was in a fight..."

The blonde woman gave up. She saw that when Yamamoto appeared, she rushed to help Allen, but she didn't let her, and Unohana became so filled with bloodlust against her that even she felt reluctant to stand in her way. However, she couldn't let her bother Allen, so she had to convince her with:

"What kind of wife doesn't have faith in her husband? And do you want to rescue your husband whom you love for his strength?"

"You're right... but I don't love him just for that... how he looks at me, how he touches me, how he kisses me, how he holds me, every experience with him has been more significant than most experiences in the last thousand years..."

The blonde woman bit her lips, not wanting to admit it, but separating this woman from Allen was impossible without killing her. No, even if she died, might she find a way to return to Allen?

Gil-chan looked at the woman and felt her heart tighten. She had great pride, and having that level of devotion was illogical, so she had no right to deny the love of the woman in front of her.

"What's going on?" Allen said with amusement.

"Welcome my love~" Unohana smiled warmly as she looked at Allen, who was standing, holding Rukia in his arms.

"Allen?" The blonde girl felt tired for no reason and did not want to fight anymore, so just so uncle and lost all hostility.

===

A/N: Merry Christmas! 🍷🗿