Palace of Pain
From Halopedia, the Halo wiki
Template:RatingsThe Palace of Pain was a location on one of the twelve original Halo Installations, specifically the one that the Forerunner AI Mendicant Bias was tasked with overseeing during his mission to destroy the Flood. During the Forerunner-Flood War, it became the stronghold of the Prisoner of Charum Hakkor, the last surviving Precursor.