Yahiko's death had been a necessary sacrifice; controlling the Akatsuki had been a means to achieve his goal. Even Nagato himself would die, and both the Rinnegan and the title of Ten-Tails Jinchuriki would belong to Obito. That would be the plan's final stage, ultimately bringing the Eye of the Moon Plan to fruition!
Yet now, this pawn, who should have been utterly discarded, even sacrificed for his plan, had not only come back to life but openly stood against him, attacking him with Madara Uchiha's eyes!
This was not merely a tactical disadvantage. It was a fundamental rejection of the entire course of his life and the justification for everything he had done.
It was an utter mockery of the meaning behind his existence as Obito Uchiha living under Madara Uchiha's identity!
The murderous rage and resentment stirred by Nagato's defection surged like boiling lava, instantly breaching the dam of his reason and reaching an unprecedented peak.
He wanted to tear Nagato to pieces immediately and erase him completely, as though that could wipe away the humiliation and self-doubt this betrayal had brought.
Reality, however, was cruel.
Seventy to eighty percent of his strength relied on Kamui, the space-time dōjutsu granted by his Mangekyō Sharingan.
Kamui's intangibility made him immune to most physical and energy attacks; its teleportation and absorption let him attack or defend with incredible tactical flexibility. The ability to store and retrieve things from the Kamui Dimension was also the foundation of his surprise attacks, traps, and even strategic retreats.
Kamui had long since become woven into his fighting style, an inseparable part of his combat habits.
Now that he dared not use Kamui, Obito was like a snake stripped of its fangs, an eagle with broken wings.
Without his greatest asset, what remained was mostly