Changes

A minimal amount of metal is used in joints and fittings, where other materials won't suffice. The most complex part of the product is its "user interface" - the bit which forms the link between host and prosthesis. A prosthesis has contacts which link it to its host's nervous system directly, allowing natural control of the limb. The circulatory system, on the other hand, is self-contained; it only interfaces indirectly with the host and gains nutrients through osmosis.

Human testing has shown that the alchemical "blood" of the machine is not wholesome. Should it enter the host's bloodstream, it induces a passive and lethargic state, turning the eyes jet black and the skin ashen. Eventually the host will starve, as they are unable to care for themselves in this state. Since the circulatory systems are meant to remain separate, this potential side effect is not advertized.