Houka looked at the black blob of "slime" with a hint of distaste.
He sensed the Kotoamatsukami ocular power within Black Zetsu's mind. This probably was not an act.
However, that ocular power did not seem particularly stable.
With outside help, Black Zetsu could probably break free of Kotoamatsukami outright.
After all, Black Zetsu was a creation of Kaguya Otsutsuki's Yin-Yang Release and had a strong resistance to ocular techniques based on Yin Release.
If old monsters like Hagoromo or Isshiki Otsutsuki casually lent Black Zetsu a little help, this Sharingan-level Kotoamatsukami ocular power would collapse immediately.
So Houka ordered Black Zetsu not to come into close contact with anyone.
Whenever he encountered a target or an enemy, his first priority was to stay hidden.
Houka ordered Black Zetsu to track down the monk Jigen, making absolutely sure that Jigen did not discover him.
Otherwise, Houka feared that Isshiki Otsutsuki could casually dispel the Kotoamatsukami ocular power affecting Black Zetsu.
Of course, as Kaguya Otsutsuki's creation, Black Zetsu was Isshiki Otsutsuki's sworn enemy. There was no chance Isshiki would help him.
Black Zetsu would be lucky if Isshiki did not kill him on sight.
As for Black Zetsu encountering Hagoromo, that was even less likely.
Black Zetsu both hated and feared the Six Paths Sage. He could not get away from him fast enough.
The people most likely to discover and dispel Kotoamatsukami...
Were actually Nagato Uzumaki of the Akatsuki, who possessed the Rinnegan, and Uchiha Itachi, who possessed the Mangekyo Sharingan and the other Kotoamatsukami Sharingan.
Houka specifically warned Black Zetsu to avoid contact with Nagato Uzumaki and Uchiha Itachi as much as possible from now on and focus on finding the monk Jigen.
As for the Akatsuki's missions, he could leave them to White Zetsu or simply ignore