Designed as a temporary life buffer for critically injured patients, the cyberneural heart is a container for a person's soul. The device is lined with millions of fiber optic threads that intersect hundreds of neurological gel packs. These packs are connected to the threads and each other through micronodes. The packs are filled with a conductive milk-like secretion that facilitates faster detection, processing and transmission of signals.
When a souls is shocked into a cyberneural heart, there is a slow adaptation process that begins to happen that scientists are still unable to explain. An electrical signal is activated by an engineer to force the heart to begin pumping the liquid in and out in an effort to simulate a real heart. However, as the pumping begins to relax into a steady pulse, a series of currents begins to develop within the fluid in the heart. These currents are never identical from metalface to metalface and are extremely complex and detailed. So much, that scientists are able to use these currents to tag and identify each metalface creation.