Abaddon

The Organon was a rumored Precursor artifact of incredible power, believed by some Forerunners to be able to activate all Precursor artifacts. It was considered to be the most sought-after Precursor artifact by Forerunner archaeologists. Whether it actually existed is unknown, but believed to be unlikely; the Didact outright denied its existence.

In approximately 100,000 BCE, Bornstellar Makes Eternal Lasting sought the artifact on both Edom and Erde-Tyrene using a pair of human guides to lead him to its presumed resting place in the Djamonkin Crater.

List of appearances

 * The Forerunner Saga
 * Halo: Cryptum