The Wrath of the Hollow King (Aizen, duh)

It was all so sudden. One second, he was rushing at Aizen with his hand coated in rainbows, the next he was lifted up and about to be stabbed by something he'd only read about. Knowing he'd inflicted his damage, though, Kurokotsu twisted around and planted his foot on Aizen's face, using that to kick off just enough to dodge the worst of the flames. "Guess it's time to use this, eh? Come on, little friend, let's have some fun with them!" At this, Arashimaru retreated back to Shikai state, leaving the kusarigama in Kurokotsu's hand.

With his eyes blinded by flames, Kurokotsu pulled a card out of his pocket and placed it in the air in front of him. "Care to help me float over these flames? Ready or not, let's go! Jump!" With that, Kurokotsu twirled around in place and smacked the card with the weighted end of his weapon.

As if by magic, when Kurokotsu next jumped into the air, he flew clear over the battlefield. While he was covered from head to toe in burns thanks to all that fire, he managed to avoid getting completely blown up. In fact, he seemed quite energetic as he reached into his robes again and tossed another card out in front of himself.

"Gentle breeze, become a set of chains and bind my foe! Windy!" This time, Kurokotsu spun around three times before he touched the card, kicking up a bit of a whirlwind with his Zanpakuto. As soon as the card was activated a large, almost hurricane-like burst of wind formed around the kooky Captain and his Zanpakuto.

With a loud, almost thunder-like laugh Kurokotsu plummeted to the ground, spinning Arashimaru around as if ready to cut down anybody he might see. As he got near the fiery hellhole, though, he pulled up and gave a final, grand swing of his kusarigama. As he did this, all of the wind he'd accumulated shot out, ready to tie Aizen down in more ways than even Kisuke had done.

Kusano was satisfied. Aizen had been too busy and he had been able to cut deeply into Aizen's shoulder and to set him on fire with his flames of retribution.
As his sword was knocked out of Aizen's shoulder Kusano himself was knocked backwards as well. He made a backflip and landed in the middle of his inferno.

He was happy his own flames couldn't hurt him. With a satisfied look on his face he caressed the flames around him. He swung his blade horizontally and all nine rings started circling around him. "You've been able to kick and shoot away my rings quite easily up 'til now.
I wonder how you will deal with this.." Kusano spoke as the flames started whirling around him along with the rings. He then roared and thrusted the hilt of his Zanpakutõ forward.
The rings were fired from the inferno at Aizen. They weren't slicing disks of fire now,
The rings had absorbed the flames of Hishiro Kiyome and were now big, white fireballs.

As the rings headed for Aizen from almost every side. Kusano dashed off and leapt up in the air. He collected two rings on his hilt and took one ring in his left hand.
He then noticed a big whirlwind passing above him, raging at Aizen. He quickly landed on the ground and rushed over to the other side with flashsteps. With Aizen completely pinned down from one side, this was another chance for him deliver an important blow. He had to make this one count. He threw the ring from his left hand in a perfect horizontal arc going for the left side of Aizen's neck. His face turned red and his eyes were about to pop out of his eyesockets. This move cost him a lot of energy.
Luckily, he had a huge amount of stamina, but he really needed to rest up a bit and take a deep breath.

Not yet... Not before he's dead...

The moment he released the ring Kusano made a front flip and spun around, releasing one ring from his hilt. This one went for the right side of Aizen's waist. With his rain of fireballs and Kurokotsu's whirlwind charging at Aizen head-on, two big fireballs coming at Aizen from the left and right but on different heights. Aizen's back was now open and he still had one ring left. Kusano used flashsteps to charge at Aizen's back and then thrusted his hilt forward, firing his last ring from close range hoping the fire would spread all over Aizen's back and the ring would fly straight through.

He finally breathed out as he watched all of the attacks come together.
It was as if it all happened in slow-motion.

Aizen simply stayed still, as the attacks flew at him before throwing up a large shield to try to counter the blows at the last second. However it wasn't enough and with a terrific explosion all of the attacks landed. His midsection was smashed with the whirlwind before having the humoungous fireballs crash into him, burning his flesh and shattering his bones. As his body was torn apart by the force of the blows he finally received the death blow as the last ring pierced through his body tearing apart his his insides as blood and organs burst out of his body only to be burned and blown away by the fire and wind. Ever so slowly, without even saying a word more, Aizen's destroyed body crumpled and fell to the ground.

And instantly into a bubbly ooze as it struck the ground. As if mocking the two shinigami, the ooze suddenly increased in size before turning into a perfect replica of Aizen's head grinning his usual hateful smile. "Good try you guys. You actually managed to destroy this form which should get you some praise."

He suddenly glared at the fake Ryuujin Jakka summoning it back to him. "But I have to say, you both are fools for assuming I would REALLY fight you mano to mano. Did you REALLY think I was just gonna sit around and takes some fireballs to the face? I mean come on people, learn to try to think ahead of the game. Just wasting all of your power if you can't hit the real me."

"But as a reward for being stupid and wasting your energies, have a new ability I just thought up." As he said this another zanpakuto appeared in front of him. Before the other two shinigami could tell whose it was, the goo head nodded and the two zans collided into each other melding into one zanpakuto.

"WONDER TWIN POWERS ACTIVATE! FORM OF..." As he said these word a tremendous pillar of flame appeared in front of him easily 70 feet tall. Inside a dark form started to appear.

"DARK HELL GIANT!" With Aizen's final bellow a tremendous Samurai like creature stepped out of the flames. Fire and lava poured constantly out of the creatures armor making the area even hotter then before as the last of the water vapor in the area succumbed to the pure heat. With a large roar the giant stomped the ground creating a huge crater as it entered a battle stance, preparing to pull out its tremendous katana the moment the shinigami got near.

"More fire, then? Guess I'll have to use...these cards!" Kurokotsu declared with a giggle, pulling two cards out of his hair. As he twirled around in circles, still approaching the ground, he flung them in opposite directions. "Conjure up a water so cold, so filled with hatred, that even the fiery depths of my soul can't evaporate you. Flying kamikaze water, heed my call. Let hell itself become enamored with your splendor! Watery, Rain!"

As he struck a Magical Girl pose, Kurokotsu swung his Zanpakuto around in such a way that each end smacked up against one of the cards. Happy with that combination, he let himself descend to the ground with a flourish, knowing that all the fiery destruction would end soon.

As if on command, the heavens opened up and a great downpour began, sure to extinquish all of the fireballs and the flaming hell giant. That step of his plan done, he pulled out another card, one sure to destroy Aizen.

"Quiet and pure, let your love rain down like thousands of blessed dildos! Silent!" Unlike the other cards, when Kurokotsu activated this one, a figure appeared. Delicate and pale-skinned, her almost artist-like midnight blue clothes managing to somehow stay dry in the rain. One hand crossed over her chest, her left hand was raised to her mouth with one finger pointing up, much like the gesture one would make to shush someone else.

(( I have no inspiration, I'll skip this turn. Take it away Zaf! ))

Aizen just laughed as Kurokotsu attempted to put out the fire giant. While the rain was powerful, the amount of energy that had been put in the Dark Hell Giant was much greater. With a snap of his fingers the flames relit bursting into even greater force then before. You couldn't beat the power of Yamamoto's zanpakuto with some...cards or whatever the fuck Kurokotsu was using. Even if your element was wind.

Speaking of wind, as the Dark Hell Giant was relit the heated air went zooming upwards smashing into the falling cold air from the storm above. As the moving air crashed into each other it began to twist and turn upon itself, only slightly though. For a moment Aizen thought about trying to start a tornado by controlling the bursts of heat energy then thought better of it. Likely Kurokotsu would just commandeer it anyways. And he wasn't exactly sure how to control the air to make a tornado. So with another snap of his fingers the Hell Giant released another blast of heat energy to push the twisting air streams upwards and break them apart.

"Alright now, which one of you would like to first fight my lovely-" Aizen suddenly stopped as his voice vanished. He looked down to where Kurokotsu was, it seems that he had summoned something that was making it so he couldn't talk.

In one moment Aizen went from evil and confident to complete rage mode. Trying to curse and finding he couldn't, he decided to stop the pretense that he had been building this whole time. He snapped his fingers, glancing annoyed at them as they didn't make any sound, before dissolving into goo and vanishing into the ground.

And out of nowhere, on the shoulder of the fire giant. Sat another Aizen. This one looked down at the shinigami, his contempt obvious. Focusing their attention on his reiatsu, it would be obvious that his power was slightly different then that of the goo Aizen they had been fighting. This was the real deal, showing himself to tear apart those that would try to take away his taunting.

"Hell Giant, destroy them." As he said those words the Giant dashed forward swinging his huge katana at the shinigami. Whatever it cut burst into shortlived flames and was split apart by the powerful attacks.

And as the giant was running forward, the head of Gel Aizen appeared right next to Kurokotsu's leg, most likely still under the effect of Silent, lunging a poison covered knife at the shinigami's leg. It wasn't a fatal poison, but it would be effective if it made contact.