transmutation

muutos

muuntuminen, transmutaatio puhekieltä change Change, alteration.
The conversion of one thing into something else; transformation.
puhekieltä Specifically, the supposed transformation of one element into another, especially of a base metal into gold.
1971, (w), Religion and the Decline of Magic, Folio Society 2012, p. 261:

The transmutation of metals was secondary to the main aim, which was the spiritual transformation of the adept.