What the Life Great Tree said was half true and half false. It was true that Obito Uchiha would indeed become a Skyfather, but false that activation would be so simple. When the time came, everyone in the city would be under Its control.
Then, the Life Great Tree would merge part of their life force into Obito Uchiha, helping him advance into a Skyfather. It needed a great general to command the entire army, a suitable fighter. It couldn't possibly handle everything personally, could It?
In addition, the Life Great Tree wanted to use Obito Uchiha to control all the Ninja and make them generals under Its command.
The Life Great Tree was about to completely fuse with Kaguya Otsutsuki. As Chax's progenitor, it was only natural for those Ninja to serve It.
"That's it?"
The Life Great Tree's words left Obito Uchiha astonished. Shouldn't he have been taken back to Its lair, allowing the King of Abilities to follow the trail and completely blast It to death?
Staying in the city and waiting for an opportunity? What the hell was that? I'm only acting. I don't actually want to hurt civilians—how could someone who harmed civilians become a superhero?
The Life Great Tree clearly misunderstood Obito Uchiha's meaning. It said, "I know you have many questions, but you don't need to think too much. Once the time comes, you will become a Skyfather.
"Now, fuse with my Great Tree clone and wait quietly."
After saying that, the Life Great Tree cut off contact. Obito Uchiha scratched his head. That King of Abilities was no good. His deduction of what came next had been completely wrong. He called me Second Sage every day, but maybe he's the real Second Sage?
Just then, a vortex suddenly appeared in the Void.