"Bang bang bang!!!"
A series of explosions rang out.
Aika Sajyou and Nero Chaos were still locked in fierce combat.
In the beginning, Aika Sajyou seemed to have the upper hand.
However, gradually, Aika Sajyou's lack of magical energy began to show.
Although she was connected to the Root through an unusual Magic Circuit, she was, after all, just a girl who had just turned 18.
The amount of magical energy in her body was still at a human level, and it was even on the lower side.
Therefore, even if she used the formations set up in her home to draw on the Fuyuki ley lines to enhance her magical energy, she still found it difficult to withstand the intensity of the current battle.
As the magical energy supply gradually weakened, Aika Sajyou's overwhelming bombardment also diminished.
"Is that all you've got?" Nero Chaos chuckled mockingly.
At this point, everyone realized that Nero Chaos seemed to be unkillable.
And Aika Sajyou quickly discovered the secret to Nero Chaos's immortality.
Inside his body was a small Reality Marble, named "Beast King's Lair."
It contained 666 Beast Factors, and no physical or magical damage could kill him.
Since he himself had merged with the Beast Factors, the beasts he released could also be considered a part of his body, rather than familiars.
The Beast Factors within him had no fixed form; even if the beasts released were killed externally, they would not be annihilated as long as they returned to the core of chaos and reverted to their original form.
Therefore, to kill Nero Chaos, one had to eliminate all 666 lives in an instant.
Perhaps only the legendary Mystic Eyes of Death Perception, which could kill all things, would be able to eliminate him.
"Hahahaha! Since you're out of steam, it's my turn to go all out!" Nero Chaos roared loudly.
Immediately after, he released hundreds more beasts, charging towards the Sajou Family home.
"Boom boom boom!!!" A series of sounds echoed.
The Sajou Family's barrier was breached.
Sajou Ayaka, who had been maintaining the barrier, instantly spat out blood.
Aika Sajyou also collapsed to the ground from magical energy exhaustion.
At this moment, only Sajou Hiroki, who had been slacking off, was left struggling to hold on.
At this very moment.
Everyone observing the battle at the Sajou Family home began to lament.
Kirei Kotomine: "The Sajou Family will disappear from now on!"
Ciel: "Damn it… these Vampires…"
Matou Zouken: "Hahaha, with them dead, my Holy Grail War will be even more secure!"
Rin Tohsaka: "Uh… Sajou Ayaka was quite nice… I didn't expect her to die… The world of a Magus is truly cruel."
Arcueid: "Fine, I'll prepare to seize that Beast."
Just then.
A suona sounded.
It turned out to be Tamamo Cat playing the suona.
This stunned everyone present.
Aika Sajyou, Sajou Ayaka, and Nero Chaos all stopped fighting, looking in the direction of the suona sound.
Following that, to Tamamo Cat's playing.
An unkempt figure appeared.
It was Nan Xiaoji, slowly appearing, seated in a chair.
To everyone's shock, Nan Xiaoji appeared floating.
Because they couldn't see System BB-chan carrying the chair underneath.
"Senpai! Look, I timed your entrance so well! The protagonist always appears at the last moment~!" BB-chan giggled.
"Hmph~! A waste of effort!" Nan Xiaoji leaned back in his chair, disdainfully.
Immediately after, BB-chan carried Nan Xiaoji in front of Nero Chaos and placed Nan Xiaoji on the ground.
This action stunned everyone.
Getting this close, wasn't he just asking for it?
Even Nero Chaos was bewildered.
"Hey, brat, are you here to die?" Nero Chaos roared.
"If you're going to kill me, do it quickly, don't dilly-dally!" Nan Xiaoji said impatiently.
"Senpai~! You misread your lines! The lines I prepared for you were 'Mere ants, why do you not bow down and submit!', that line is much more domineering!" BB-chan said, holding a script and smiling.
"This really is your script, I'm not going to be led by you! You've tricked me for 99 lives, and you still want to trick me? Hmph!" Nan Xiaoji crossed his legs and began to give up.
"You disgusting beast collective, hurry up and kill me, I want to get rid of this big-breasted trouble!"
This startled Nero Chaos.
He completely dared not make a move.
Who knew what this brat was up to?
And wasn't that cat playing the suona behind him a legendary Servant?
Was he the Master of the Fuyuki Holy Grail War?
Although he didn't know what that cat was, nor what her combat power as a Servant was.
But Nero Chaos wasn't stupid; even if he was a Dead Apostle, he might not be able to defeat a Servant.
Out of caution, Nero Chaos quickly retreated ten meters, fearing that Nan Xiaoji would activate a Noble Phantasm.
And his retreat shocked everyone around him even more.
"What's going on? Why did Nero Chaos suddenly retreat?" Kirei Kotomine was utterly stunned.
"Did he see something extraordinary about this young man? But he looks like an ordinary person to me!" Ciel said, bewildered.
"Impossible, a Dead Apostle's intuition is not comparable to a human's; he must have sensed some danger! This kid must be playing innocent to fool us!" Matou Zouken was even more shocked.
"Huh? Isn't that Nan Xiaoji from the next class? He's actually that powerful?" Rin Tohsaka was dumbfounded.
"As expected of my disciple! I really did teach him well!" Sajou Hiroki said smugly.
"…What exactly is going on with him? Did he secretly practice?" Sajou Ayaka was very confused.
"Ah~! As expected of Anata~! So fierce~!" Aika Sajyou's eyes turned into hearts.
Arcueid was also very surprised.
Even she wasn't confident enough to make Nero Chaos so afraid.
She couldn't help but develop a deep curiosity about this young man in front of her.
"Why are you retreating, you ghost? Hurry up and kill me, so I can get rid of this idiotic system!" Nan Xiaoji complained.
"Senpai, if you say that, BB will be sad~!" BB-chan giggled.
"Get lost!" Nan Xiaoji cursed.
"Damn it, you actually told me to get lost! Don't think I'm afraid of you just because you have a Servant helping you!" Nero Chaos roared.
"Looks like you're an idiot too, I wasn't talking to you!" Nan Xiaoji cursed.
"Huh? You're fighting me, but talking to someone else, you're ignoring me! You scoundrel!" Nero Chaos cursed.
Nan Xiaoji: "…"
"You go to hell!!!!" Nero Chaos cursed.
He released 665 beasts at once, intending to annihilate Nan Xiaoji in one go.
"Ding~! Senpai, you are currently facing a threat of death, please counterattack as soon as possible!" BB-chan giggled.
"As long as Senpai agrees to participate, BB-chan can immediately make Senpai an existence stronger than the Jewel Mage~!"
"Hmph~! Let the fireworks come even more fiercely!" Nan Xiaoji tilted his head back and gave up.
BB-chan was awkward for a second, then immediately smiled; her psychological adjustment ability was just that strong.
"Ding~! Senpai tilted his head back, adopting a posture of contempt towards the enemy~!" BB-chan said to herself.
"Congratulations, Senpai, for completing the task of despising the enemy, you have obtained a one-time Noble Phantasm [Nether Mirror Grimoire]!"
The next second, a huge Nether Mirror, held by an Egyptian dog-headed god, appeared above Nan Xiaoji's head.
Then countless ghosts spewed out from the Nether Mirror.
These ghosts instantly swallowed Nero Chaos's 665 beasts.
And Nero Chaos himself was also submerged by the ghosts.
Because the Nether Mirror Grimoire had an instant death effect, Nero Chaos's resurrection was completely ineffective.
Just like that, Nero Chaos instantly turned into a pool of blood.
At this moment, everyone fell silent.
Kirei Kotomine: "…"
Ciel: "…"
Matou Zouken: "…"
Rin Tohsaka: "…"
Sajou Ayaka: "…"
Aika Sajyou: "Anata~!"
Arcueid: "…"