Space-Time Dojutsu like Kamui was almost impossible to escape once it struck its target's body.
Even someone as powerful as the Fourth Hokage had only escaped after being hit by Obito's Kamui by using the Flying Thunder God Technique, which also had space-time abilities. So despite being dozens or even hundreds of meters away, Naruto, down in the crater and in Sage Fox Mode, had no way to escape Kamui's pull through his own abilities.
Naruto's legs were on the verge of being twisted off by the vortex of Obito's Kamui.
Suddenly, a figure appeared behind Obito and swung a scythe down at him with all his might.
Whoosh.
Obito staggered, nearly falling from the tree.
Then he felt extremely weak, as if something had drained all the Chakra from his body.
The blow also interrupted his Kamui, giving Naruto, down in the distant crater, a moment to catch his breath.
Obito snapped irritably, "Who's there?!"
At that moment, one figure after another darted out of the forest, surrounding Obito.
There was no doubt who they were: they were all Nine Masked Beasts, summoned by Menma through Nine Mask Svāhā.
The one who had just struck Obito with a scythe, draining his Chakra and interrupting his Kamui, was the Reaper, one of the Nine Masked Beasts, who could absorb Chakra.
Finally, Menma appeared before Obito in Spirit Body form and chuckled. "I thought the Akatsuki Organization would have some backup waiting in ambush. I didn't expect you'd send only two useless fools!"
Obito's expression darkened.
From the intelligence he'd gathered recently, he knew that Naruto had once split off a negative personality after going berserk while training.
He'd thought this would become one of Naruto's weaknesses. He hadn't expected Naruto's negative personality to work with Naruto himself to fish for