Lifeworkers were one of the main castes in Forerunner society. They specialized in medicine and the study of life in all its forms, including experimenting with new forms of life. The highest possible rank achievable by a Lifeworker was Lifeshaper. Earth, then called "Erde-Tyrene," was at one point an experimental planet under the care of the The Librarian, a Lifeshaper and one of the most powerful Lifeworkers to have ever lived.[1] Bornstellar-Makes-Eternal-Lasting encountered the Librarian on Earth during his tenure as a Miner.[2]

List of appearances


  1. Halo: Cryptum, forward jacket description
  2. Tor.comHalo: Cryptum chapter one excerpt
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