He had barely voiced the order before his Mjolnir’s onboard computer shut down all external communications. It was reacting not to his words, but to the intention that had given rise to them, accessing his thoughts via the neural lace implanted at the base of his skull. The interface allowed him to manipulate a half-ton of power armor as effortlessly as his own body, and to keep track of his fellow Spartans by merely thinking about them. Yet even after using it for the last few months, he still found it unsettling at times—especially when a targeting reticle or status readout appeared on his heads-up display before he had consciously summoned it.

Halo: Silent Storm Ch 1