Sarutobi Toru had not developed the Parasitic Technique on a mere whim. By now, all his research and exploration into longevity had reached bottlenecks.
The Yang God Martial Way had effectively reached its end because humans in the Shinobi World lacked acupoints.
Until he figured out how to handle violent natural Chakra, sage training could only serve as a combat method.
There were still ways to advance along the Path of the Ghost Immortal, but without the Thunder Tribulation of the Yang God Great Thousand World, the path would inevitably remain stuck at the Ghost Immortal stage. Besides, unless absolutely necessary, Sarutobi Toru did not wish to replace his physical body.
The only remaining method was to seize the Demonic Statue of the Outer Path and cultivate a Chakra Fruit, but Sarutobi Toru himself did not know whether that path could truly work.
With his current lifespan, he could live at least another two or three hundred years. Once he became a Ghost Immortal and could possess another body, living for a thousand years was not impossible. It seemed he still had plenty of time. At his current age, worrying about such things seemed somewhat premature.
But in truth, he had already exhausted all the benefits the Reincarnation Warehouse had brought him after his transmigration. If he wanted to forge a Path to Longevity from here on, he would have to rely entirely on himself. The difficulty naturally could not be compared to before.
If he did not work hard now, was he supposed to wait until he was old and lament the idleness of his youth?
That was why he had created the Parasitic Technique. On one hand, it would create another physical body that he could use freely for cultivation and experiments. On the other, it would allow