Obito said nothing about Black Zetsu's current situation for a very simple reason—he had already sealed Black Zetsu away.
However, Obito had completely misunderstood Uchiha Yato's intentions.
Without giving it much thought, he immediately concluded that Uchiha Yato intended to harm Black Zetsu.
After all, during that fierce free-for-all, Black Zetsu had indeed had a perfect opportunity to possess Uchiha Yato directly and easily claim the final victory.
Obito confidently believed that he had seen through Uchiha Yato's true intentions.
So, after returning to his own territory, he found a suitable opportunity without hesitation and sealed Black Zetsu away completely. That was precisely why Black Zetsu had not come with Obito.
As for why Uchiha Yato had deliberately asked about Black Zetsu just now, it definitely was not because he cared about Black Zetsu in any way.
Without a doubt, Uchiha Yato had merely been testing Obito to see whether he had truly followed his instructions and sealed Black Zetsu away.
Naturally, Uchiha Yato had no idea that Obito had concocted such an intense mental drama in his head.
"Fine, then let's go take a look at my kingdom together. But let's be clear first—you're not allowed to damage the environment there or kill people indiscriminately."
Although Uchiha Yato spoke lightly, Obito believed that if he dared to kill anyone freely in Uchiha Yato's world, Uchiha Yato would twist his head right off.
Only after Obito had finally passed through the tunnel did Uchiha Yato temporarily protect the entire space.
Who knew whether they might have a chance to return someday? Taking some proper precautions was necessary.
The original world.
The moment Obito emerged from the space-time tunnel, he felt gravity.
That was right. Just like last time, the opening was still floating in midair, and the ground below