The living core of some Bio-Mechanical Beings, it is similar to a Spark, in that is what keeps the being alive and is considered their soul, or the place where it resides. It is also called the Spirit Core.
Held in a metal ball is a ball of vines which glow.
The Vines are organic but they are fed by Ethium, connecting directly with the bio-circuits of the body. Inside the ball is what appears to be a sort of gold/green flame that the vines seem to be wrapped around.. The Core is what produces all the Bio-Electric Impulses that drive the body. Even with full batteries and a Ethium store, without the Core the body would soon die.