His body may still be alive, but his mind is long gone. He was driven insane by the realization that he had an entire fireteam that he could not remember. That, accompanied with the thought-based Vex that infiltrated his brain, caused his fall. Pahanin Errata witnessed this descent into madness, and recorded some of the more important things that he said. Kabr pierced the Vault, letting in the Light. He also created the Aegis using his own Light and the hammered chassis of a Gorgon