Black Zetsu's mockery was somewhat piercing.
It sounded as if he was mocking Aizen Sousuke.
This feeling was indeed pleasant, as Black Zetsu was mocking Aizen Sousuke to his face, even with a hint of self-mockery in his words, not mentioning that Uehara Naraku deceived him, but claiming that Uehara Naraku deceived us.
These small details are very important.
This way, it makes Black Zetsu seem like a fool who got tricked as well.
Moreover, Black Zetsu is very familiar with Aizen Sousuke's character; he is quite magnanimous, even more so than the reincarnation of his unfilial brother.
Aizen Sousuke naturally wouldn't blame Black Zetsu's sarcasm. His hand slowly supported his cheek, and he chuckled softly, "Oh? Regarding Naraku… do you have any discoveries?"
Aizen Sousuke did not reveal that he had recognized Uehara Naraku's true nature, as if he were still unaware and maintained his original attitude toward Uehara Naraku.
Seeing Aizen Sousuke's smile, Black Zetsu's lips curled, his eerie eyes slowly narrowed as he nodded, "Quite interesting… there are memories in that White Zetsu of a battle between that brat called Uehara Naraku and Uchiha Madara…"
The mocking tone in Black Zetsu's voice grew stronger, almost as if revealing his own achievements: "Lord Aizen would never have imagined… that Uchiha Madara, the Deadguard Seat Officer who once defeated you, was completely powerless in Uehara Naraku's hands."
At this point, Black Zetsu added grimly: "Even Uchiha Madara went all out, using that blue Giant which once ravaged the Hollow World…"
"..."
Aizen Sousuke's hand lowered again, his fingers tapping on his armrest, and suddenly a projection appeared on the wall of this secret chamber.
In the projection, a tall blue Susanoo was wielding a Sword of Susanoo, slashing deep ravines!
"Is this Madara-san in such form?"
Aizen Sousuke slowly lowered his head to look at Black Zetsu, softly speaking: "Has that youngster Naraku grown so powerful?"
"Indeed…"
Black Zetsu nodded, chuckling darkly: "Lord Aizen would never have expected, would you? That we've always regarded him as a spare pawn of a brat…"
"I already knew."
Aizen Sousuke slowly shook his head, softly continuing: "The Hogyoku warned me. It sensed the hidden strength within Naraku…"
"Lord Aizen knew all along?"
A hint of surprise flashed perfectly across Black Zetsu's face.
"Yes."
Aizen Sousuke nodded calmly and explained: "I just didn't want others to show flaws in front of Naraku, so I kept this news hidden…"
Aizen Sousuke's lips curled slightly, letting out a soft chuckle: "Perhaps Naraku wants to hide his strength because he's worried others will feel ashamed… but as his former captain, I certainly can't let him remain dormant like this…"
To be honest.
If Black Zetsu hadn't killed that White Zetsu who monitored Uehara Naraku's power, it might have allowed Urahara Kisuke and the Quiet Spirit Court High Command to notice Uehara Naraku's true nature.
With a little provocation, when they are slaughtering each other, even when the Zero Squad has to take action and fight the Uehara Race, Aizen himself could emerge as the true mastermind and reap the benefits like a fisherman...
However, Black Zetsu is also loyal to him.
As a former experimental appendage, seeing this Black Zetsu who remains loyal to him despite witnessing Uehara Naraku's power made Aizen Sousuke feel slightly relieved.
Yet, what made Aizen Sousuke somewhat uncomfortable was that after obtaining the Hogyoku, he thought he would break through the limits of Shinigami Power and thus gain the upper hand within the Hollow World, the Uehara Race, and the Quiet Spirit Court that he led.
Now, it seems he is still at a disadvantage.
"Black Zetsu, find a way to leak the information to the Quiet Spirit Court!"
Aizen Sousuke glanced at Black Zetsu, quietly continuing: "I'll go to meet Orochimaru-san, perhaps we should postpone the date of our decisive battle…"
"Yes, Lord Aizen."
Black Zetsu's body slowly sank into the ground.
After Black Zetsu left, Aizen Sousuke slowly reached out to touch his chest, where the Hogyoku was implanted.
He must find a way…
To become even stronger.
Just the Hogyoku, perhaps, is not enough!
Aizen Sousuke reached out and grabbed the Kyoka Suigetsu Zanpakuto in his hand, gazing at the reflection on its blade, his eyes showing a rare hint of hesitation.
Decades ago.
During that defection incident, he was severely injured, and the Kyoka Suigetsu Zanpakuto was destroyed by Uchiha Madara, fortunately, Orochimaru helped repair his Zanpakuto.
Aizen Sousuke had once thought of discarding this Shinigami Zanpakuto after acquiring the Hogyoku since he believed he would surely surpass the mirror image of himself in the Kyoka Suigetsu Bankai form, and did not want to see another person be compared with him.
Even if it was another false self.
Now it seems…
No power should be wasted.
Kyoka Suigetsu remains very useful.
After Aizen Sousuke had fused with the Hogyoku, the abilities of Suigetsu Kyozo Aizen were greatly enhanced, and if the original and mirror image worked together, they could be even more formidable.
However…
Perhaps this still isn't enough!
He still needs to gain more!