In truth, neither Black Zetsu nor Obito Uchiha wanted Nagato to use the Demonic Statue of the Outer Path as his trump card against Shihōin Naraku.
If the Demonic Statue of the Outer Path was damaged in battle and underwent some other unknown change, it would be disastrous.
Their plan might even fail at the very last hurdle.
But without using the Demonic Statue of the Outer Path, none of them could think of a way to deal with Shihōin Naraku.
Of course, it was not as though they truly had no other options.
Obito and Black Zetsu had another trump card: resurrecting the deceased Madara Uchiha and having him deal with Shihōin Naraku.
But according to their original agreement with Madara Uchiha, it would be inappropriate to resurrect him before the plan reached its crucial stage.
Besides, Obito and Black Zetsu were also doubtful that Madara Uchiha could match Shihōin Naraku. If they resurrected him only for him to lose to Shihōin Naraku, things would turn out badly.
Resurrecting Madara ahead of schedule would also disrupt the entire plan, and Obito's identity would be exposed to Nagato. With that in mind, Black Zetsu and Obito temporarily abandoned the idea of resurrecting Madara Uchiha.
It was not time yet!
Black Zetsu looked at Shihōin Naraku. Truthfully, he had given him this intelligence because he hoped Naraku would not damage the Demonic Statue of the Outer Path too badly when fighting Nagato.
After some thought, Black Zetsu decided he still needed to remind Shihōin Naraku. "The Demonic Statue of the Outer Path is the key to successfully reviving the Ten-Tails. If it's damaged too badly, there might be other consequences."
Hmm?
Is he asking me to go easy on it?
Naraku glanced at Black Zetsu. That was not a problem.