Ichigo forcefully dragged Aizen out of Karakura Town and into the mountains of the Rukongai. As Ichigo landed he threw Aizen, causing him to crash.

Aizen: Impossible. There's no way he could overpower me like this.

(Y/N) landed besides Ichigo shortly after.

Ichigo: Let's do this, Aizen. We'll end all of this in an instant.

Aizen: End it in an instant? I see. I understand now, Why you lost your Spiritual Pressure. You didn't lose your Spiritual Pressure. You discarded it. I don't know how you did it, but you converted all of your Spiritual Pressure into your body's physical strength. Arm strength, leg strength, grip, throwing, running... In exchange for drastically improving every one of your physical abilities, you have discarded your Spiritual Pressure. All because you gave up fighting me, Spiritual Pressure versus Spiritual Pressure.

(Y/N) was honestly amazed at the reveal of Ichigo's new strength. But at the same time he couldn't help but groan at the fact that Aizen always seemed to know what was going on.

Aizen: But...do despair. I will teach you that the physical strength you were counting on is incomparable to my own power. You as well, (Y/N). Simply because you have reached the apex of both Shinigami and Hollow does not mean you've broken the boundaries between them like I have.

(Y/N) whispered to Ichigo.

(Y/N): Same plan as last time Ichigo, you fight and I'll jump in once I find an opening.

Ichigo: Fine by me.

Aizen dashed towards Ichigo, swinging his sword. Ichigo blocked the attack with ease, causing the nearby mountain to shatter from the shockwave.

Aizen: What's that? You parried that well. How shocked you must be though. The landscape changes with a single swing of my sword. That is how powerful I am now. To be honest, I didn't think my abilities had improved to this extent. I'm happy, Ichigo Kurosaki. Thanks to you and (Y/N) (L/N), I can test these powers that transcend those of Hollows and Shinigami to my heart's content.

Aizen dashed in once again, however, Ichigo simply parried Aizen's strike once again. With every sword swung, Ichigo parried it, causing the mountains in the area to shatter. Eventually Ichigo and Aizen clashed blades.

Aizen: By some odd coincidence, we seem to have arrived at a similar evolved form where our right arms are combined with our Zanpakuto. Perhaps this is the true form of the Zanpakuto.

Another one of Aizen swings was met with a block from Ichigo.

Aizen: I realized it during our clash just now. As I suspected, your evolution and mine are on different levels. If I so wish... I can shatter your Zanpakuto with a single swing!

Aizen swung his sword. However, Ichigo simply caught the blade with his bare hands.



Aizen: *thinking* Impossible! He caught it?! Dodging it, I could understand. Though he shouldn't even be able to dodge at that speed to begin with. Even so, dodging it, I could understand. But...he caught it?! He caught my blow?

Ichigo:Why so surprised? Is it so unbelievable that I caught your sword? What? Does it scare you? That something you can't comprehend happened right before your eyes?

Aizen merely chuckled.

Aizen: Interesting, Ichigo Kurosaki. Something I can't comprehend, you say? Don't talk as though you've won. It was simply a case of your physical strength momentarily exceeding mine. Miracles like that happen from time to time. But I am a being who surpasses even that. In that case, I will see to it that miracles like that never happen again by crushing you to pieces with Kido!

Aizen jumped back and started casting a spell.

Aizen: Seeping crest of turbidity. Arrogant vessel of lunacy. Boil forth and deny. Grow numb and flicker. Disrupt sleep. Crawling queen of iron. Eternally self-destructing doll of mud. Unite. Repulse. Fill with soil and know your own powerlessness!!"

Hadō #90. Kurohitsugi

A familiar black coffin surrounded Ichigo, however Ichigo didn't seem phased and actually stood in place.

Aizen: Now that I transcend both Hollows and Shinigami, this is Kurohitsugi with a full incantation! It unleashes enough gravity to warp time and space! The likes of you could never comprehend it, Ichigo Kurosaki!

AIzen ranted as Ichigo was engulfed in the hado skill. However...



Ichigo simply broke out of it with a swing of his arms.

Aizen was flabbergasted at the show of strength Ichigo had shown him.

Ichigo: You don't seem to realize, do you? My power is greater than the power you have right now. The force that erased that mountain...was my sword. Here I come, Aizen.

Ichigo moved faster than Aizen could react, landing a clean slash through his chest up to his shoulder.



However it didn't end there.

(Y/N) took advantage of this chance to sneak behind Aizen and grab his neck.

(Y/N): Thanks for telling me the incantation of that spell of yours...

(Y/N) then recited the incantation.

(Y/N): "Seeping crest of turbidity. Arrogant vessel of lunacy. Boil forth and deny. Grow numb and flicker. Disrupt sleep. Crawling queen of iron. Eternally self-destructing doll of mud. Unite. Repulse. Fill with soil and know your own powerlessness!!"

Hadō #90. Kurohitsugi

Similar to what he did to Ichigo, Aizen was trapped in a black coffin. (Y/N) got out of the way before he was completely trapped in the spell with Aizen.

Aizen broke out of the spell at the last minute, clearly taking some sort of damage from the spell. Aizen backed away, creating space between himself and his two opponents.

Ichigo: When I backed away from you in our last battle, you asked me why. But now you're doing the exact same thing. So let me ask you the same question. Why did you back away just now?

For the first time since meeting, (Y/N) saw Aizen with a visible aggression on his face.

Aizen: I see. You're pleased that you stopped my sword? Are you pleased that you overcame my Kido? Are you pleased that you put a scar on my body? Are you pleased you caught me by surprise? Don't be so full of yourself, humans!

Aizen started to... well... act weird. (Y/N) didn't know what was going on but he didn't want to find out. (Y/N) immediately summoned Merlin and ordered him to fire a cero at Aizen. (Y/N) didn't trust getting anywhere near Aizen while in that state.

However the moment Merlin's cero was about to make contact, Aizen exploded in a pillar of energy as he started to transform. The energy pillar blew away the cero and as the blinding light from the energy faded, Aizen emerged with a different appearance. Aizen had transform once again.



Aizen: This is inexcusable, isn't it, Hogyoku? That I allowed two humans to get the better of me.

From across the field, (Y/N) looked at Ichigo.

(Y/N): I was hoping it was just coincidence but it really seems like the moment we become objectively stronger than Aizen, the Hogyoku pushes him further to overcome our advantage.

Ichigo: Then there's only one thing left we can do then.

(Y/N): Yeah.

Both: Defeat Aizen before the Hogyoku has time to give him more strength.

Aizen from on top of a cliff, shot a cero from out of one of his newly grown hollow-like appendages. (Y/N) jumped in front of the explosion, absorbing most of the blast to replenish his spiritual energy.

Ichigo used that chance to rush Aizen, tearing through one of the hollow appendages. (Y/N) flew out of the explosion, clearly damaged and used that chance to fire a Gran Rey Cero point blank at Aizen.

Aizen screamed, creating a shockwave that pushed (Y/N) and Ichigo away. (Y/N) did his best to fight through the power of the shockwave and rush back in to fight Aizen. (Y/N) finally took out his second weapon that he gained from resurreccion. The weapon that represented his hollow powers. (Y/N) drew a long sword that doubled as a gun. One of Aizen's hollow appendages came flying towards (Y/N) but was easily cleaved through from (Y/N)'s sword.

The rest of Aizen's Hollow appendages stretch to attack (Y/N). (Y/N) took out his scythe and effortlessly cut through all of them.



Ichigo used this chance to stab Aizen through the chest, nearly reaching the Hogyoku. Aizen grabbed Ichigo by the throat and dragged him across the ground before holding him up again. Regrowing the hollow appendages that (Y/N) cut off, Aizen pointed them all at Ichigo.

Aizen: Can you hear me, Ichigo Kurosaki? Indeed, for a moment, you broke the boundary between Hollows and Shinigami to become a transcendent being. But that power is no more! Not a trace of it remains! You're not even worth trying to understand any more. I, a true transcendent being, will kill you. By killing you, I will completely break free from both insignificant Shinigami and Hollows alike. It's over! Ichigo Kurosaki!

Ichigo: Over, you say? Is this all you've got?



Ichigo effortlessly removed himself from Aizen's grasp.

Ichigo: Let's end this already, Aizen. I've grown sick of your arguments. I'll show you. This is the Final... Getsuga Tensho!

Ichigo's spiritual energy started to turn completely black. The spiritual energy enveloped him as he started to change his entire appearance. Even (Y/N) was confused about what was going on.

Aizen: What is... that form?!

Ichigo: The Final Getsuga Tenshou is... me... becoming Getsuga itself.



Ichigo: If I use this technique, I will lose all of my Shinigami powers. That's what "final" means.

Aizen started to slowly have a mental breakdown.

Aizen: *thinking* I still can't sense his power. I have evolved into a being far beyond that of a Shinigami. Just as two-dimensional beings can never interact with three-dimensional beings, no Shinigami or human could detect my Spiritual Pressure unless I deliberately brought down my powers to their level of awareness. Could it...possibly be that he... is at an even higher level than myself?

Aizen's anger started to rise even more.

Aizen: Absurd! That couldn't possibly be! A mere human cannot surpass me! That can't be!

Ichigo simply turned towards (Y/N).

Ichigo: I'm going to end it. Right now.

(Y/N): You got this. You're stronger than me at this point.

Ichigo simply nodded. Ichigo raised his hand, black spiritual energy forming in the form of a sword. Ichigo then swung his hand down as he simply uttered...

Mugetsu

The attack didn't feel like a world ending catastrophe like the others. Mugetsu cleanly cut through Aizen, creating a veil of energy across the Rukongai.



As the veil started to fade away, Ichigo landed on the ground. (Y/N) did the same, landing right next to Ichigo.

The mask surrounding Ichigo's face started to shatter as Ichigo's spiritual pressure started to slowly weakend.



(Y/N) looked over Ichigo with mixed emotions. He wanted to be happy that they pretty much won but his friend basically had to give up his powers to land an attack capable of dealing significant damage to Aizen.

Aizen's body started to crash into the ground, bloodied and weakened from Ichigo's attack. Aizen was struggling to regenerate his body.



Ichigo: He is still able to regenerate?

(Y/N): I'll make sure he doesn't have the chance.

(Y/N) summoned Baraggan, who grabbed Aizen's shoulder. (Y/N) felt as though Aizen was weak enough to be able to use Baraggan's ability without the Hogyoku interfering. Baraggan slowed down Aizen's aging instead of speeding it up, stopping Aizen's regenerative ability from being effective.

Aizen tried to attack Baraggan, however, Baraggan dodged in time to prevent being hit by Aizen.

Just then Ichigo's Final Getsuga Tenshou ability ended. Ichigo's long black hair returned to its original short, orange hair. Not only that, Aizen's zanpakuto started to fall apart.

Ichigo Kurosaki. (Y/N) (L/N). You lose. Observe. My Zanpakuto is fading away. You should know what that means. The Hogyoku has determined that I have no need for a Zanpakuto! Like you, I have become one with the Zanpakuto and its powers. In fact, you no longer have that power, while I will reach a level far beyond that of yours! It's over!

Irony struck as Aizen's body started to glow green as his power suddenly plummeted.

Aizen: M-my strength! No... Not just that, I can feel my spiritual pressure! What happened?

The situation turned worse for Aizen as red glowing spikes started to grow out of Aizen's body.



Aizen: Kido?! But when was I attacked?!

???: Seems it's finally taking effect.

???2: About time! Seriously, for a second I thought we'd messed up somewhere.

Arriving at the battlefield, (F/N) and Urahara made their appearance.

Ichigo and (Y/N): Mr. Urahara!

Aizen: Kisuke Urahara, is this your doing?!

Urahara: Yes. With the help of (F/N) here of course. Before you were able to completely transformed, when you were most vulnerable, I planted that Kido into another Kido and shot it into your body. It's a seal. I figured that once you fused with the Hogyoku, killing you would be nearly impossible. So I invented a new Kido to seal you off.

Aizen: Is that so? I hate to disappoint you. At this moment, I am about to evolve even further. You can't seal me off with this level of Kido!

Irony struck once again as Aizen started to revert to his original form.

Aizen: What?! What's happening?

Urahara: It is the Hogyoku's will. The reason the seal that I shot into your body is only taking effect now is because your powers have weakened. First came from (F/N)'s attack, Rapid Void. That attack wasn't made to weaken you straight away. (F/N) created that attack specifically to work in tandem with my kido skill. Then there was (Y/N) and Ichigo's devastating power. It was able to take effect because they fought this hard and pushed you to your limit. The Hogyoku is saying that it does not recognize you as its master.

Aizen: That's absurd. That can't be. There's no way!

Aizen started to get covered in a cocoon of some sort, as the seal started to grow.



Aizen: Kisuke Urahara! I despise you! With your great intellect, why won't you take action?! Why do you subjugate yourself to that thing?!

Urahara: That thing? You mean the Soul King? I understand now. You saw, didn't you? Without the existence of the Soul King, Soul Society would split apart. The Soul King is the keystone. Without the keystone in place, it would fall apart easily. That's how the world is.

Aizen at this point was nearly encased by the kido spell. His head was the only part of his body that was visible.



Aizen: That's an argument a loser would make! A victor must always speak of how the world should be rather than how the world is! I...

*BOOM*

Aizen was completely sealed away.



To be continued.