"Mother, kill him! Hurry up and kill this madman!"
When Black Zetsu saw the pity in Emiya Shirou's eyes, it could no longer endure the shame and anger. It roared furiously.
Kaguya Otsutsuki raised her hand and launched two bone spurs toward Shirou. She went straight for a killing blow, intending to eliminate him with her All-Killing Ash Bones. This man's power was simply uncontrollable.
Kaguya knew the power of the Ten-Tails better than anyone, and she understood just how terrifying Shirou, who could cultivate a new Ten-Tails, could become.
If Shirou was allowed to live… no, even the current Shirou was already proving to be too much trouble. In this battle, she didn't seem to have any advantage at all.
"Kannagi."
Shirou casually raised his eyes. A strange mirror materialized in front of him. After absorbing the incoming All-Killing Ash Bones, two identical bone spurs shot out from the mirror, flying back toward Kaguya as if her own attack was being reflected.
"It can reflect attacks…" Black Zetsu immediately identified the ability, recalling another ninja who could use a similar technique. "It's like the jutsu of the Fourth Mizukage, Yagura Karatachi, but its effect is much stronger..."
After all, Yagura could never have reflected a jutsu on the level of All-Killing Ash Bones.
Veins bulged on Kaguya's forehead. She stared intently at Shirou's movements, then suddenly raised her palms, sending out a barrage of countless chakra fists.
Eighty Gods Vacuum Attack!
This was the ultimate taijutsu that worked in tandem with the Byakugan. It could be used for both offense and defense, and perhaps it could strike Shirou from an unexpected angle.
However, Shirou's mirror seemed capable of reflecting any jutsu. It almost instantly expanded to envelop his entire body, absorbing and redirecting every single fist from the Eighty Gods Vacuum Attack.
Kannagi. This was the ultimate dōjutsu of his Rinnegan. Any being with less chakra than Shirou could not break through its defense. More importantly, the Kannagi mirror also obtained the information of any jutsu it countered.
As it happened, the current Shirou, after absorbing the Ten-Tails, had already completely surpassed this progenitor of chakra.
"What on earth is that jutsu…?" Kaguya didn't understand the principle behind it.
Black Zetsu couldn't explain it at that moment, either. A terrifying thought had just occurred to it. In this world, when it came to Emiya Shirou, any incredible thing seemed possible. It was truly beginning to understand the trouble they were in for making him an enemy.
"That's a Rinnegan dōjutsu…" Sasuke, who was quite sensitive to the activation of Rinnegan techniques, saw the timing of Shirou's activation. "Like my Amenotejikara, it looks like a jutsu for defense and counterattacks..."
In that case, isn't an ultimate dōjutsu like that a bit useless? Sasuke wondered.
After all, while defense might put you in an unbeatable position, it doesn't offer a way to defeat your enemy. A being like Kaguya, the progenitor of chakra, was not easy to deal with. Having personally fought her, Sasuke still couldn't forget the terror of watching her destroy his Susanoo with one hand.
Just being able to withstand a Susanoo's attack with physical strength alone was terrifying.
But Black Zetsu's thoughts were completely different from Sasuke's. It had witnessed Shirou's power at his peak much earlier than Sasuke had.
No, Shirou wasn't even at his peak back then.
"Mother..." Black Zetsu slipped into Kaguya's sleeve and began to speak in a low voice, relaying the information it knew about Shirou. "We must be careful of his…"
"We can only be careful," Kaguya said, gently shaking her head and dismissing the information. Possessing the Byakugan, she had a more direct sense of Shirou's power. "Because right now, his chakra is stronger than mine."
For a moment, Black Zetsu couldn't think of a solution. It had always believed that Kaguya could crush everything with her absolute power. The idea of Kaguya being weaker than her enemy was something it had never even considered.
Shirou, however, did not attack immediately.
He closed his eyes gently, processing the jutsu information of the All-Killing Ash Bones and Eighty Gods Vacuum Attack his Kannagi had just absorbed. This information extraction was the mirror's greatest value. Any jutsu an enemy used could now be used by him.
"Turning their own tricks against them, is that it?"
Shirou's palm suddenly clenched into a fist, and he violently swung it toward Kaguya. Countless chakra fists flew out from his palm.
"!!!"
Black Zetsu was stunned.
"That's my jutsu…" Kaguya's Byakugan stared intently at the incoming fists, searching for a gap in the attack to dodge. This was one of her few advantages. At this level of battle, the Byakugan's observational ability was more suitable than the Sharingan's, able to see through flaws in an attack earlier.
But… there were no flaws. As a technique that integrated offense and defense, a full-powered Eighty Gods Vacuum Attack was absolute. Kaguya's thoughts turned subconsciously.
"Don't change dimensions…" It was too late. Black Zetsu's reminder didn't come in time. Its mother had too little combat experience and always made these small mistakes by relying on her massive chakra.
This battle would be incredibly difficult; they were destined for a battle of attrition. She had just wanted to block or defend against one attack. There was no need to consume a huge amount of chakra to switch dimensions.
Even though this Amenominaka dimension belonged to Kaguya, she needed to consume a massive amount of chakra every time she wanted to switch its environment. The most troublesome part was… switching dimensions might not even be useful.
Based on what Black Zetsu suspected about Shirou, it was hard to imagine space being a limitation. He had already researched Yomotsu Hirasaka, a jutsu unique to the Otsutsuki clan that even Kaguya's two sons had never mastered.
The next moment, the entire world changed.
Only after Kaguya had moved them to another sand dimension did she realize the mistake she had made. Of course, she hadn't done something completely foolish. Kaguya had transferred herself along with Naruto and Sasuke, hoping to absorb their chakra before fighting again.
But she had no time. Shirou's figure followed right behind.
The moment Kaguya attempted to switch dimensions, Shirou's Kamui Mangekyo Sharingan had already locked onto her trail and torn open a space-time portal of its own. The instant Kaguya appeared in the sand dimension, Shirou's figure appeared right beside her.
"Get into close combat!" Black Zetsu immediately advised Kaguya, adding its own theory, "If you fight him up close, he might not be able to use that absolute defense jutsu. Mother's Byakugan has a greater advantage in taijutsu than his Sharingan…"
"Okay." Kaguya trusted Black Zetsu completely.
The next moment, the Rabbit Goddess charged directly toward Shirou, her long hair floating around her as her palms took a sharp, attacking posture.
"Wait…" However, after speaking, Black Zetsu realized another troublesome problem and hurriedly added, "Shirou's swordsmanship is excellent, too…"
But the reminder was, once again, too late.
When Shirou saw Kaguya charge at him, there was a hint of surprise in his eyes at her courage. He subconsciously condensed a black sword from a Truth-Seeking Orb in his hand and slashed directly at the Rabbit Goddess's neck.
Kaguya had no time to block. Her figure retreated rapidly as her white hair instantly gathered to block Shirou's attack.
Strands of white hair fell.
Shirou's speed was immense. He almost instantly shattered the wildly gathering hair and closed the distance to Kaguya's body to less than half a meter.
One sword thrust… directly through Kaguya's chest.
From the moment they truly started fighting, less than a minute had passed, and Kaguya had already suffered a heavy blow. Her white robe was miserably stained crimson with her own blood.
Yomotsu Hirasaka!
A pitch-black space-time portal opened behind her. The Rabbit Goddess desperately pushed the black sword out of her chest, her figure disappearing into the portal.
Unfortunately, this escape was futile.
Shirou opened a space-time portal at the same time, twirled the black sword in his hand, and thrust it directly into the portal behind him.
On the other side, Kaguya had just escaped. Her figure had barely emerged from her Yomotsu Hirasaka when the enemy's portal appeared right behind her. The pitch-black longsword once again pierced through her body.
"This is… somewhat unbelievable," Shirou's voice appeared from behind Kaguya, a hint of disappointment in his tone. "The legendary Rabbit Goddess… her combat experience is worse than a pair of Konoha genin."