Alchemy

(definition)

 a  science and speculative philosophy aiming to achieve the transmutation of the base metals into gold, the discovery of a universal cure for disease and suffering, and the discovery of a means of eternal life

 a power or process that changes or transforms something in a mysterious or unexplained way

  an inexplicable or mysterious transmuting

Transmutation

(definition)

  an act or instance of transmuting or being transmuted: such as:

a :  the conversion of base metals into gold or silver, a base substance into a higher substance

b :  the conversion of one element, atom,  or nuclide into another