Shentu's research on resurrection methods centered around the retribution body during his lifetime had other fatal flaws.
Even if this method itself can be established, it would at most prepare a resurrection medium that is "equivalent to another self." Ying Lingyun, in resurrecting Yinyue, must not only possess a resurrection medium but also manage to gather mana equivalent to ten Great Impermanence levels. If one intends to resurrect a Great Impermanence, who knows how much additional power would be required to meet the stringent conditions? A hundred Great Impermanence-levels? Or a thousand? Or perhaps even more?
