Illusion Technique: Learning Edition

"Do you really think it's feasible to use an illusion technique to help Hiroshi Ōtsutsuki grow?" Kaguya Ōtsutsuki looked at Hiroshi Ōtsutsuki, who was still struggling within the illusion, her eyes thoughtful. She did not have much affection for Hiroshi Ōtsutsuki, but he was, after all, a life she had created, so she still cared about his condition. Kenichi Amamiya calmly nodded upon hearing this. This was an experimental illusion technique he had developed based on experiments he had previously conducted on Ōtsutsuki Isshiki. Though it did not seem particularly impressive on the surface, its true purpose was to teach Hiroshi Ōtsutsuki, allowing him to acquire new knowledge while also helping him mature. Moreover, after gaining a new understanding of time, Kenichi Amamiya's control over it had reached an extremely high level. He could now easily make Ōtsutsuki Isshiki live through an immensely long life within an illusion. In a sense, that could probably be considered immortality. With Kenichi Amamiya's current strength, the illusions he constructed could easily achieve an effect where one day equaled ten years. What did that mean? One month was equivalent to three hundred years. Most ordinary people only lived seventy or eighty years, which amounted to merely seven or eight days inside the illusion. So Ōtsutsuki Isshiki was already effectively immortal. After all, Ōtsutsuki Isshiki could live for at least several more decades, and that was enough time for him to spend his entire life inside the illusion. That was why Kenichi Amamiya had also placed Hiroshi Ōtsutsuki in this state. He wanted Hiroshi Ōtsutsuki to grow within the illusion and become useful in the laboratory as soon as possible. At the same time, Kenichi Amamiya intended to study whether this method could be replicated. If it could, then he could use it to mass-produce