Rinnegan Transplant

Once only the Deva Path remained among the Six Paths of Pain, Nagato knew that Richard was far stronger than he had anticipated. Not only that, but he had also confirmed something else: Richard possessed a special energy more powerful than Chakra. Though he did not know what this special energy was, he knew that it was precisely because of it that Richard's sword techniques possessed such astonishing power. "You only have one Deva Path left.