Cryptum

Cryptums, or Warrior Keeps, were powerful objects created by the Prometheans. The nature of a Cryptum was unknown to most Forerunners, including Bornstellar Makes Eternal Lasting. However, he was aware that the violation of a Cryptum invoked dire consequences, one of which was angering the powerful Prometheans.

A Cryptum was discovered in Djamonkin Crater by the young Forerunner Bornstellar Makes Eternal Lasting, containing the Didact in suspended animation.

List of appearances

 * Halo: Cryptum