The Eight-Tails saw Nagato's eyes and cried out in alarm, "B, run! That's the Rinnegan! We can't beat him! Get out of here!"
Killer B had never seen the Eight-Tails so panicked. He knew this opponent would be difficult to handle, and with so many enemies against him alone, he would be at a disadvantage. He quickly took the Eight-Tails' advice. Of all the options, retreat was the best.
Killer B immediately manifested the Eight-Tails' complete body. Nagato and the other Akatsuki members thought he intended to fight them head-on, so they all prepared themselves. After all, this was the Eight-Tails, the strongest tailed beast besides the Nine-Tails. None of them dared let their guard down.
But after manifesting the Eight-Tails' complete body, Killer B did not attack at all. Instead, he spat out an enormous mouthful of ink, blocking everyone's vision, then quickly fired a Tailed Beast Bomb and fled without lingering.
None of the Akatsuki members had expected this move from Killer B, and they froze in surprise. Nagato was the first to react. He used Shinra Tensei to repel all the ink, then calmly extended both hands and absorbed the entire Tailed Beast Bomb that followed.
But by the time he had finished, Killer B was long gone. Nagato flew over and searched the area, but found no trace of him, leaving him frustrated. The others followed, and Yahiko came up beside Nagato and asked, "Well? Did you find him?"
Nagato shook his head. "No. He got away."
Then Konan said, "Nagato, Yahiko, we need to leave here quickly. My Paper Sensing has detected a large number of ninja converging on us. The Fourth Raikage is probably among them."
After thinking for a moment, Nagato said, "We're withdrawing. Since the Eight-Tails has escaped, there's no benefit in