Chapter 1438: The Entire Lifelong Learning of Kill Teacher

Aizen activated Absolute Domination, first using verbal inquiries to learn how Bai Lan connected to other worlds.

Then, Aizen had Bai Lan personally demonstrate the connection to other worlds, completing the data recording.

This experiment consumed nearly an entire day.

During that time, Bai Lan's subordinates came by.

But all of them were deceived and driven away by Aizen's Five Senses Domination.

After completing the experiment, Aizen released Bai Lan's restraints.

"I'd like to ask—you're really who?"

Bai Lan stared deeply at Aizen, neither angry nor panicked, chillingly calm.

Moreover, his demeanor was utterly different from their first meeting—cautious, disbelieving.

After what had just transpired, he fully understood Aizen's terror.

This was a demon-lord-level existence he could never oppose, even if he staked everything.

"Zero-three-three."

If Aizen wished, he could effortlessly shatter everything Bai Lan had.

Yet what puzzled Bai Lan was that among all the parallel-world data he possessed, there was no trace of Aizen... Bai Lan's mind flashed with thoughts.

How could such a terrifying being never appear across infinite parallel worlds? Was he unique to this world? That made no sense.

"Considering the considerable help you've given me—I'll warn you of four words."

Aizen smiled, patted Bai Lan's shoulder, his expression tinged with regret.

He truly wanted to teach Bai Lan Shinigami reiatsu—or perhaps domineering aura—and see what chaos the new version of Bai Lan might unleash in this world.

But with Su Han's warning in mind, though regretful, Aizen ultimately crushed the idea.

Lowering his head, Aizen softly whispered four words into Bai Lan's ear.

"Ze Tian Gang Ji."

As he spoke, Aizen transformed his body back into a hollow form.

He cast one final deep look at Bai Lan, then used Shunpo and vanished.

Bai Lan stood frozen in his room, his expression shifting wildly; after a long while, he exhaled deeply, "The Tenth Head of the Vongola... Looks like something major has happened."

Bai Lan naturally knew Ze Tian Gang Ji—he'd encountered him in many parallel-world records as one of his primary opponents.

"I assumed Ze Tian Gang Ji hadn't yet grown strong at this point—couldn't even serve as a worthy rival... Apparently, I was mistaken."

Fascinating. I'll need to increase surveillance.

Aizen drew a deep breath, clenched his fist, his expression turning cold once more, "But before that, the most important thing is... grow stronger as fast as possible."

... One day passed. Su Han had attended the banquet and, through Ze Tian Gang Ji's introduction, met his companions.

"Then now, we should go."

Su Han spoke softly.

"Then, my lord, and everyone—farewell!"

Ze Tian Gang Ji nodded, offering no plea to stay, yet his words were sincere.

On the other side, Kill Teacher and Gokudera Hayato were saying, "Hey, Octopus Monster, you're leaving now?"

Gokudera Hayato's voice was low.

"Don't call me Octopus Monster..."

Kill Teacher's tentacles floated in midair; he sighed in exasperation, then fixed Gokudera Hayato with a solemn gaze, "By the way, young man—interested in becoming my student and inheriting all I've learned?"

"All you've learned?"

Gokudera Hayato sized up Kill Teacher, his eyes filled with deep skepticism.

Learn from an octopus? Are you sure you're not just learning how to make takoyaki? "What is that disrespectful look? I'm the number-one assassin from another world—the Shinigami! Idiot."

Kill Teacher growled.

"I question that."

Gokudera Hayato shrugged, then turned his gaze to Ze Tian Gang Ji, "Besides, I must stay by the Tenth Head's side! As his Right Arm, how could I leave now?"

"... Do as you please."

Hearing this, Kill Teacher shook his head and abandoned the idea of training Gokudera Hayato.

"Big Brother, aren't you worried about what Aizen might do?"

Luo Cuilian stood beside Su Han, asking softly.

"Of course not."

Su Han smiled, "I may not trust Aizen—but I must trust."

After a brief pause, Su Han glanced at Luo Cuilian, "Will you return with me to my world this time?"

Luo Cuilian thought for a moment, then shook her head, "I've decided to return to the God-Slayer world... There are still matters I must resolve!"

Luo Cuilian felt regret, yet her eyes held a sharp edge... Earlier, she had chatted with the old Hou Jue at the Daolegong Society, where he mentioned that multiple Not-Gods had appeared across the Chinese lands.

Upon hearing this, Luo Cuilian's chest filled with intense killing intent. Though she could have asked the old Hou Jue to help her hunt them—and he would have gladly done so—

on one hand, even if the old Hou Jue hunted the Not-Gods, he could not precisely track them; it would take him a long time... Unlike Luo Cuilian, who, upon returning, could instantly detect the Not-Gods' traces through her own established defense structures.

On the other hand, though Luo Cuilian had once said, if she was truly unable to act, she could ask Lu Yinghua to contact Marquis Wo Ban.

But that applied only when she was truly trapped.

Having spent so long with Su Han, Luo Cuilian was content... Though leaving him brought regret, it was still acceptable.

"Since you've made your decision, I won't say more."

Su Han studied Luo Cuilian for a moment, nodded, said nothing more, and closed his eyes.

Entering the Daolegong Society chat room.

Su Xiao Xiao: "Aizen Sōsuke."

I've already finished handling things here! We can return anytime.

Have you finished over there?

Aizen Sōsuke: "Nearly done! Don't worry."

Su Xiao Xiao: "Did Aizen cause any trouble for Ze Tian Gang Ji?"

"He caused a little trouble."

Ze Tian Gang Ji: ""

"Aizen revealed Ze Tian Gang Ji's name! Beyond that, he didn't do anything else."