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This unidentified Sentinel variant is a Forerunner machine seen on Installation 00, also known as the Ark. One such machine killed Henry Lamb when he attempted to touch it, by stabbing him and boring into his neck.[2]


  1. Halo: Hunters in the Dark, page 280 ("Aggressors were roughly three meters from front to back, but this one was only about one-third the size.")
  2. Halo: Hunters in the Dark, page 280