I recognized one of its sources: https://en.m.wikipedia.org/wiki/Magnum_opus_(alchemy) https://en.m.wikipedia.org/wiki/Magnum_opus_(alchemy) Not coincidentall

I recognized one of its sources: https://en.m.wikipedia.org/wiki/Magnum_opus_(alchemy) https://en.m.wikipedia.org/wiki/Magnum_opus_(alchemy) Not coincidentally, a goal of alchemy and its etymology was producing gold.