It wasn't anything precious at all. It certainly involved advanced technology, but to him, it was just so-so. These machines were simply used to manufacture the Divine Blessing Potion, and the Divine Blessing Potion was nothing like a Superman serum.
Its principle was based on the genetic similarity within the same species: it extracted the gene segment with the highest degree of similarity and then replaced that specific segment within the body of the person receiving the blessing. Moreover, according to Uchiha Brahman's calculations, that exact gene segment would transform the blessed individual into his thrall.
This transformation was irreversible because, at its core, it wasn't some high-level genetic modification. It didn't grant the blessed individual powerful superpowers or add some special organ.
Chapter 56