As little as is known of the the Noumenon, even less is known of the Hypokeimenon, so much so that most dismiss it as speculation and rumour. The only sources only vaguely refer to another purpose to the Labyrinth, not another installation, and the word itself, Hypokeimenon, is just the translated Sangheili name given to a hypothetical installation. No sources actually name it, or specify its true purpose. Engagements against Sov- >ALERT: Incoming transmission: >Unksdr: Children. You’re all just children. >Unksdr: Delicate. Fragile. Immature. >Unksdr: And all the more dangerous for it.