Sakura watched as the Eight-Tails rampaged through the forest that ringed the Hidden Leaf Village, knocking trees down with his enormous fists and eight octopus tentacles as he made a beeline towards her home. Killer B and the Hachibi truly were a force of nature to be reckoned with, and as they approached the wooden palisade before which she stood, Sakura briefly toyed with the idea of summoning the Gedō Mazō to suppress the Eight-Tails.
After all, she now possessed her own pair of Rinnegan, so she shared the ability to summon the Demonic Statue of the Outer Path with Madara and Obito. Since the Akatsuki had dutifully fed the Ten-Tails' husk Tailed Beast after Tailed Beast, she doubted it would suck her dry of vitality… the problem was that she'd then be stuck in a tug of war with Madara over ownership of the statue, which would split her focus and make it more difficult for her to protect the village from invading forces.
"After all, why not?" Sakura muttered to herself. "Why shouldn't I keep it?"
The Ten-Tails would be safer in her hands than in Madara's, and with its power, she'd easily be able to drive the invaders out of her homeland without killing them.
Really, the only thing stopping her was this niggling feeling in the back of her mind that by using Ten-Tails' power, she might cease to be Sakura, even if she never became the Ten-Tails Jinchūriki and thus the vessel for Kaguya's resurrection (this particular Ten-Tails and Kaguya were one and the same, since she had fused with the God Tree towards the end of her life).
…
Indeed, the Sage of Six Paths had warned her about the Chakra Fruit's primordial will.
Once upon a time, the low-ranked Ōtsutsuki clanswoman Kaguya's heart had been filled with love for her husband and her children, but as they say, absolute power corrupts absolutely. After her mortal husband's perceived betrayal and subsequent death, she claimed to seek ultimate power to protect this world she loved so much from her fellow Ōtsutsuki, but unfortunately for her, the road to hell is paved with good intentions.
Only the truly driven, like Madara or the Ōtsutsuki's high-ranked clansmen, could avoid having their minds warped by the Chakra Fruit's allure, no matter how many they ate, because their ceaseless quest for ultimate power did not conflict with the fruit's will to unite all chakra. If one is already a demon, then becoming a devil does not make for much of a difference.
…
Sakura performed the Akimichi clan's secret seal.
"Susano'o + Super Multi-Size Jutsu!"
Pink chakra shrouded Sakura's outline as her amazing body expanded. She began rapidly shooting up in height, sending the Hokage Guard Platoon scrambling for cover as her sandalled feet grew to the size of elephants, and a tsunami of dirt erupting outwards as her immense bulk sank a dozen centimetres into the forest soil.
Within seconds, the back of her head was visible from within the village as she rose beyond the palisade and the tallest trees of the forest, her enormous breasts jiggling like pudding within the confines of the Susano'o's breastplate, bulging obscenely at the sides of her torso and visible even from behind. Her bust yearned to escape its chakra prison, but alas, the Susano'o simply could not keep up with her expansion.
At her immense size, standing tall at over two hundred metres in height, the dense layer of pink chakra comprising the Susano'o seemed no thicker than the Hokage cloak flapping behind her in the wind.
With the villagers' loud cheers erupting behind her, Sakura strode purposefully towards the Eight-Tails ahead, holding her shoulder as she wound up her right arm to warm up, the Susano'o's naginata gripped in her free hand, while her fellow Konoha-nin spread out to meet the enemy in the forest, taking care not to walk into her path.
"Those eyes!" gasped Gyūki, who was less than half her size. "This is bad, B! I dunno how she did it, but she's got the eyes of the Sage of Six Paths!"
"And the Lady Hokage's got boobs that got on for days!" B added dreamily. "Yo, this might sound like excessive glaze, but those things never cease to amaze!"
"Here she comes!"
With twelve quick strides, Sakura closed the gap between them, covering the equivalent of about a kilometre in the blink of an eye, and all of a sudden, she was looming over the Eight-Tails, arms raised high as she brought her naginata down upon him, clearly aiming to bisect the little sixty-metre-tall octopus in a single swing.
"Ugh!"
Gyūki reached up and clapped his hands against the sides of the naginata's blade, stopping it mere metres before it cleaved through his head. Clenching his buttocks, the Tailed Beast sent his tentacles curling up the polearm's shaft, struggling to wrest it from Sakura's hands.
"Yo, get ready for a Tailed Beast Bomb!" Killer B rapped. "After this, she's gonna need some high-quality balm!"
The Eight-Tails opened his massive maw as he collected plus and minus chakra in his mouth, but without warning, Sakura let go of her weapon and unleashed a devastating uppercut into his jaw, causing his teeth to snap shut and the Tailed Beast Bomb to explode prematurely inside his mouth.
"Ouch…" Gyūki groaned, acrid smoke spilling out from his nostrils and from between his pearly white teeth. "Tha' hurts…"
As the massive octopus reeled backwards, Sakura took the opportunity to wrench her naginata back from the beast's squirming tentacles, chopping off its right horn in one swing before burying the blade in his breast, impaling and pinning the Tailed Beast to the ground. Satisfied that he wasn't going anywhere, Sakura let go of her weapon once again to clap her hands.
"Chibaku Tensei—"
Sensing a massive build-up of chakra overhead, Sakura forcibly ended her jutsu, leaving B trapped halfway inside the massive half-sphere of compressed earth that had risen around him, drawn towards the gravity core she had flung at the Eight-Tails' head.
"Guillotine Drop!"
Sakura glanced up, only to be struck right between the eyes by the Fourth Raikage's lightning chakra-imbued axe kick. Somehow, he had made it all the way up to her head, two hundred metres above the ground, just to kick her in the forehead. The impact cracked the Susano'o's thin shell, eliciting little more than a slight stab of pain.
She took a swipe at him, but the little bugger was annoyingly fast, resulting in her smacking herself in the nose. He scampered down her neck, but luckily for her, her Perfect Susano'o was airtight, so she did not have to worry about him diving into her clothes.
"Particle Style…"
Sakura's pupils shrank to pinpricks as white engulfed her vision.
At her enormous size, she made for quite the easy target; she knew this because she had dutifully read the battlefield report of what had happened to Chōji and Chōza on the western front, and Ōnoki knew it too, having been the one to send them to the hospital in the first place!
"Oh, shit—"
Ōnoki was hovering right behind her, and he had enveloped her head in a cubic boundary. Now that she knew he was there, it was obvious he'd been the one to drop A on top of her! To make matters worse, the Susano'o's defences were no match for the Tsuchikage's Kekkei Tōta... with the amount of chakra he had poured into the jutsu, her entire head was about to be reduced to dust, and there would be no regenerating from that!
...
A certain commenter expressed their desire for me to open a discord channel for readers of the story. Is this something you'd like? If more than ten different people comment on this line, I'll do it.
But if they don't, feel free to open one yourself.