Fuck.
Fuck it.
But most especially; fuck you, Kakuzu.
Fine.
Fine.
You want to play the stupid bullshit game? Let's play the stupid bullshit game!
My form wavered as I pulled more of My Darkness outside of myself, spreading it out on the Sanbi's shell. Not into, but on top of.
I made sure that the entirety of his shell was covered, before I stopped holding on to my shape, and collapsed entirely into formless Darkness.
The firestorm was still closing, and would be upon us in only a second or two, but a second or two was eternity in battle.
Ice-cold fog exploded out of My Darkness, pressurized and quickly spreading out into thick, near-frozen mist. Some of it would freeze into rime when it came into contact with the ground, but it would nevertheless play merry havoc on the firestorm; too much cold water vapor in the air to keep it going, most fires would just be smothered.
Of course, that was without the Sanbi's own efforts.
Who apparently decided that the best way to combat a massive firestorm was to spit out an equally massive quantity of water, releasing an entire deluge that it couldn't have possibly contained inside itself, mixing with my own ice cold mist to form a wave of what was almost-but-not-quite sleet.
The water crashed through the firestorm, violently dispersing it in a burst of steam, and continued in a much diminished form, sheer mass and inertia taking it through to the other side.
I didn't see what happened after that, but it apparently did something, because I noted a spike of pain in Kakuzu's Heart.
I didn't give him any time to recover. I lashed out, tendrils of My Darkness striking forwards, aimed at where I could see Kakuzu's Heart. The long, whip-like cords of Darkness didn't even manage to get close before Kakuzu's Heart suddenly vanished, though they were still moving fast enough to skewer the block of wood that had taken his place.
Kawarimi.
I really hate that technique.
I let my tendrils retract, noting that the Sanbi was once again gathering its Chakra, condensing it inside of his throat.
It took a breath, before-
"!"
The Sanbi roared, releasing all the Chakra it had gathered in its throat. It was loud, and powerful, with enough physical power behind it that I could feel some of My Darkness that was closer to the Sanbi's mouth be reduced to smoke. The ground cracked, and I noted Kakuzu's giant thread monsters writhing on the ground, Kakuzu himself wrapped up inside an earth dome.
The roar ceased, and the earth dome fell away, Kakuzu looking up at the Sanbi with a notable weariness. His thread monsters began to move again, each one instantly going back towards Kakuzu, merging into a larger mass of black threads.
Aha.
Opportunity.
A ball of Darkness shot out of My Darkness, a little black bullet loaded with Stop that would hopefully-
Kakuzu just about instantaneously exploded into smoke, his Heart vanishing in an instant.
Kawarimi.
I really fucking hate that technique.
I glared at him.
Well, that's okay. I mean, it's not like Slow and Stop are the only Time Magicks that I have access to.
Kakuzu, I decided, could go fuck himself
"This is probably going to be very weird for you, but if you could take the opportunity to hit him with a Bijuudama or something, that'd be awesome."
For a moment, a single, slow moment, I paused. I slowed, stopped, and considered.
My Keyblade appeared, though it was hidden underneath My Darkness, obscured from the world by a layer of black.
As a natural conduit of magic, having it out was the only real way I would even be able to achieve what I wanted.
Not for long -never for long on something the size of the Sanbi-, only a scant few seconds at best. But a few seconds was eternity in combat, and it would seem so much longer for the Sanbi.
I thought of Time. And prepared, because I needed to make this spell as strong as I could. Strong, in this case, simply meant as large a dilation factor as I could.
My Keyblade touched the Sanbi's shell.
And at that moment, I let the spell go.
Haste.
The Sanbi moved. One moment, we stood, respectively glaring and staring at Kakuzu.
The next, the Sanbi was posed, all three of its tails pointing towards its mouth, a large, purple black ball of overwhelming Chakra gathering in seemingly an instant. I didn't entirely catch the moment where the Sanbi swallowed that ball of Chakra, but it must have, because in the next moment, we were so close to Kakuzu that I could've just reached out and touched him. The Sanbi's mouth was wide open-
Two things happened near simultaneously.
The first, a bright, white light consumed everything in my sight, utterly blinding me from seeing anything. It was like staring into the sun, massive and overwhelming, so luminous that, for a moment, I wondered if somebody hadn't cast the stars themselves down upon the earth.
The second, the shockwave slammed into me, so strong and so violent that My Darkness was wiped away, reduced to smoke from the sheer force, leaving me naught but a black cloud. It was an odd feeling, to be destroyed so completely and utterly, so quickly and massively, despite how spread out I had been, without even having had a chance to do anything about it.
The sound that accompanied that shockwave was terrible, a loud, powerful boom, followed by low, but still powerful rumbling, intermixed with the keening wail of rushing wind.
The light lessened a little, and I could finally see what was happening.
The Sanbi, nearly obscured entirely by the massive amount of smoke kicked up by its attack stood stock still, its tails lazily twisting in the air behind it, its massive body still held low to the ground. The dust was beginning to settle, and I started to make out the damage cause by its attack.
The... everything, was ruined. There was literally nothing around that was untouched by that attack. In front of the Sanbi was a massive crater, slowly filling with water. At the opposite of that very same crater was a trench, seemingly perfectly carved out of the ground, stretching onwards and onwards and onwards. I couldn't... entirely make out where the trench ended.
I looked around.
The surrounding landscape was, to not put to fine a point on it, fucked. Everything close to the crater was but dust and ash, ruined beyond recognition. Further from that, however, was just more ruined landscape. The previously forested area was completely ruined, with trees uprooted and broken, the ones that hadn't been turned into sawdust and ash, anyway.
I frowned.
I'm preeetty sure that there used to be a lake over there, too. There isn't one now, but I could have sworn...
I stopped.
So that's what the Bijuudama is like at point blank range.
"Is he dead?"
I looked forwards, staring at the massive trench that seemed to stretch on and on and on. In the distance, far, far into the distance, I could make out Kakazu's Heart drifting upwards.
"Yeah. He's dead." I blinked, and began drawing My Darkness back into myself. "He is very, very dead. He took a Bijuudama to the face, didn't get out of the way in time, and now his body is an expanding cloud of atoms."
I kept watching Kakuzu's Heart as it floated upwards, before finally disappearing in a burst of Light.
I paused. Something I was forgetting.
Beneath me, the Sanbi gave a 'hmm', which translated somewhat oddly given its sheer size.
Sanbi.
Oh. Right. "Hello, by the way."
"Huh? Oh, uh, hi."