Rinnegan

"Ancestor," Uchiha Cheng seized the opportunity to climb the social ladder, "since you have appeared here, you must have a way to solve the problems with my body!"

"Naturally. Three years ago, I discovered several souls carrying otherworldly power appearing in the ninja world. The future of the ninja world is bound to see new waves, requiring new power to assist it. After all, I am a dead man, and my power is limited; I can no longer protect the living world. It just so happened that at this moment, I discovered your changes. It is as if guided by fate, a perfect successor has appeared before my eyes," the Sage of Six Paths said.

Otherworldly power? Several? Could there be other transmigrators? Uchiha Cheng felt a tightening in his chest, yet judging by the Sage of Six Paths' reaction, it did not seem like he had discovered his origin.

Could it be that other souls with otherworldly power masked his existence? After all, he was a blank slate with nothing; despite being a member of the Uchiha clan, he had almost been killed by the bloodline inherent in his own body.

"Next, I will mobilize natural energy to flow into your body to treat your strange illness. You must carefully perceive this process; it will be beneficial to you."

The Sage of Six Paths tapped his staff against the center of Uchiha Cheng's forehead.

Uchiha Cheng instantly reconnected with his body. Although his soul was in the spiritual world, he now had a reaction to his physical body in the outside world.

He could clearly feel infinite natural energy surging toward him, pouring into his frame. His previously withered body regained its vitality. As the surging natural energy continued to pour in, his eyes began to erupt with a powerful suction force, constantly absorbing the natural energy and transforming it into his own power.

This quantity! Uchiha Cheng was somewhat tongue-tied; if not for the Sage of Six Paths, he truly did not know who else could satisfy such a massive influx of energy.

With the influx of natural energy, his body began to emit a sense of satisfaction, as if a traveler in the desert had suddenly received fresh water. During this process, the natural energy was clearly displayed before him, allowing him to perceive it more deeply and understand the process of absorbing it.

Sage Mode! He had an epiphany; the Sage of Six Paths wanted him to master the method of Sage Mode during this process.

Not letting the opportunity slip by, he strove to commit every minute change to memory, constantly attempting to perceive and absorb natural energy in the way described in the original work.

He did not know how much time had passed, but Uchiha Cheng discovered that he could absorb natural energy into his body using his own power. Although it was minuscule, it meant he had gained entry into Sage Mode.

At this moment, the suction force of his eyes gradually weakened and finally disappeared. The influx of natural energy also slowly ceased.

"Very well, your bloodline has now awakened," the Sage of Six Paths said, lowering his staff and nodding with satisfaction. "Come, try your new power."

Uchiha Cheng slowly opened his eyes. Although he was in the soul space, his eyes, like those of the Sage of Six Paths, displayed elliptical purple patterns.

"Not bad, not bad," the Sage of Six Paths said with a smile as he looked at his eyes. "My task is complete; the next mission shall be handed over to you."

"Ancestor, you still haven't told me what the mission actually is." Uchiha Cheng was somewhat puzzled. The Sage of Six Paths had said a great deal, helped him cure his illness, and awakened his new power, yet he had failed to tell him what the mission was.