That trip to Whirlpool Island had also cost Obito Uchiha both his legs. Only with numerous White Zetsu Clones harassing and obstructing his pursuer had he managed to drag his mangled body underwater, hide on the seabed, and barely escape with his life.
During this little warm-up, Shin Uchiha had acquired a large number of White Zetsu Clones. Not only had he copied the Wood Release Jutsu he had long coveted-the Impersonation Technique and Mayfly Technique-from them, but he also gained materials for future uses of Impure World Reincarnation and for experiments.
In truth, with his current strength, Shin Uchiha could easily have stopped Obito Uchiha and Black Zetsu from escaping. But if he did, he might never get to meet the legendary Madara Uchiha or the Millennium Shut-In, Kaguya Ōtsutsuki.
So Shin Uchiha chose to ignore Obito Uchiha's glaring slipup. He wandered around on the surface of the sea, put on a show of searching, then leisurely left Obito Uchiha's hiding place.
Everyone, human or monster, was showing off. Only Obito was getting beaten up.
After that thrashing from Shin, Obito Uchiha went into hiding. Even Konan, a fellow member of the Akatsuki, had no idea where he had gone.
Besides, after taking on the name of a rogue ninja, Uchiha Itachi really did need somewhere to stay. Shin Uchiha therefore planned to send him to the Akatsuki. At the very least, there was someone in that organization who could look after him.
Tsunade sighed and waved a hand. "Then do as you like. As Clan Leader of the Uchiha Clan, you've obviously thought through Itachi's situation more thoroughly than I have. I'll stay out of it."
Then Tsunade continued:
"No matter what, you still have to serve as the Ino-Shika-Cho team's instructor. Don't forget. As for Asuma, since