Chapter 249:
The strength of a ninja resurrected through Edo Tensei depends largely on the quality of the sacrifices used.
Because of this, Orochimaru decided to upgrade his sacrifices.
Using clones as sacrifices might seem wasteful, especially given that his current facilities could only produce about 100 clones every six months.
But there weren't that many strong individuals who required clones as sacrifices, so Orochimaru didn't mind using them sparingly for this purpose.
The process for enhancing clones was straightforward. He would create an injection solution using cells from the First Hokage and then infuse the clones with it via specialized instruments.
This allowed him to strengthen a batch of clones in a single day—quick, efficient, and effective.
After strengthening the clones, Orochimaru implanted them with new memories and replaced the previous, weaker Edo Tensei sacrifices.
Much of his time in the Sound Village was spent refining this process.
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