Demon Cores

Demon Cores are the heart and soul of a @Demon Lord. They are glowing spheres of matter and demonic energy containing which extend the life of their masters indefinitely. They also allow them to manipulate matter and eventually let them access all sorts of unnatural powers. However, if a Demon Core is destroyed, the @Demon Lord who owned it will be destroyed in turn.

@Demon Lords of the @Demon Lord cannot be destroyed unless their demon core is destroyed.