Editing Abaddon

{{Era|Forerunner}}

{{Quote|He now realized that it was a Precursor's version of an [[ancilla]]-one as far beyond those of the Forerunners as a [[keyship]] was to a wooden raft.|[[IsoDidact]] on Abaddon<ref name="F113">'''Halo: Fractures''', ''Promises to Keep'', ''page 113''</ref>}}

'''Abaddon''' was a powerful [[Precursor]] [[Knowledge engine|construct]] tasked to serve as the overseer of the [[Domain]]. By the latter years of the [[Forerunner]] civilization, Abaddon's nature had been forgotten by most Forerunners and it had passed into legend as '''the Organon''',<ref name="ptk">'''[[Halo: Fractures]]''', "[[Promises to Keep]]"</ref> a fabled Precursor artifact of incredible power.<ref name="hc 19">'''Halo: Cryptum''', ''page 19''</ref>

Abaddon was created by the [[Precursor]]s in the ancient past as what the [[IsoDidact]] believed to be their equivalent of an [[artificial intelligence]], albeit far more sophisticated than any [[Forerunner]] [[ancilla]]. Left behind by the Precursors after [[Forerunner-Precursor war|their passing]], Abaddon evidently helped early [[Forerunner]]s access the [[Domain]]. Discovered by ancient Forerunners in a remote part of the [[Milky Way]] galaxy, it would eventually come to be housed at the heart of [[Maethrillian]], the [[ecumene]]'s capital—specifically the [[Mysterium]]. Over time, the [[Ecumene Council]] would suppress public knowledge of Abaddon, and its true nature was eventually forgotten to all but the most high-ranked Forerunners while its name was corrupted to "the Organon",<ref name="ptk"/> a Precursor relic rumored to be capable of activating all other Precursor artifacts. The Organon was considered to be the most sought-after Precursor artifact by Forerunner archaeologists.<ref name="hc 19"/>

Several years prior to [[97,445 BCE]], [[IsoDidact|Bornstellar Makes Eternal Lasting]] sought the Organon on both [[Mars|Edom]] and [[Earth|Erde-Tyrene]] using a pair of [[human]] guides, [[Chakas]] and [[Riser]], to lead him to its presumed resting place in the [[Djamonkin Crater]].<ref name="c103"/> Instead he found the Cryptum of [[Ur-Didact|the Didact]], who stated that the Organon did not exist, at least not in the form imagined by most Forerunners.<ref name="c103">'''Halo: Cryptum''', ''page 103''</ref>

At the close of the [[Forerunner-Flood war]], just minutes prior to the firing of the [[Halo Array]], the [[Gravemind]] told the [[Librarian]] that the Organon was actually the [[Domain]], a quantum information storage medium utilized by the Forerunners to a great extent, leading the Librarian to conclude that the Domain had been created by the Precursors. When the Halo Array was [[Great Purification|fired]], the Domain and all knowledge within would be lost forever, along with all Precursor artifacts.<ref>'''Halo: Silentium''', ''pages 322-323''</ref> The Librarian proceeded to send a message to the IsoDidact in which she pleaded him to find the Organon, which she stated was located at Maethrillian, and restore the Domain. The IsoDidact would not view the Librarian's message until after the [[reintroduction]], well over a century later. Shortly afterward he, [[Chant-to-Green]], and several other surviving Forerunners embarked on a mission to Maethrillian in order to reactivate the Domain. They were accompanied on the expedition by former [[First Councilor]] [[Splendid-Dust-of-Ancient-Suns]], who had been informed of some of the details about the Organon, though even he was not fully aware of its true nature.<ref name="ptk"/>

At the capital world, Abaddon announced its true name to the Forerunners and attacked them with pseudo-organic constructs it had seemingly created based on [[Promethean Crawler]]s. Once the Forerunner party reached the Council amphitheater, Abaddon confronted them, representing itself with a massive [[Holography|holographic]] projection of a winged, androgynous Forerunner-like being. Twisted and embittered by the damage wrought upon the Domain by the Halos, Abaddon announced that the Forerunners were to face trial for their crimes against the [[Mantle]]. While Splendid Dust remained before Abaddon to accept his sentence out of guilt, the IsoDidact, Chant-to-Green, and several others escaped deeper into the capital world where they discovered the physical location of Abaddon. Abaddon attempted to prevent the Forerunners from interacting with its housing, vaporizing two of them and attempting to immobilize the rest by locking their [[Forerunner personal armor|armor]] before it could pronounce its judgment on them. However, [[Growth-Through-Trial-of-Change]] managed to insert a [[deadbolt]] key into the device, sacrificing herself to serve as the template for the restored Domain. This act seemingly caused Abaddon to disappear and the Forerunner survivors were able to leave Maethrillian unhindered while the Domain began to heal.<ref name="ptk"/>

As a [[Precursor]] intelligence, Abaddon was an incredibly powerful entity. It was capable of vaporizing physical beings at will, and could effortlessly interface with Forerunner technology, such as access their communications or [[Forerunner personal armor|personal armor]]. It could also create organic versions of mechanical constructs, like Promethean Crawlers or Aggressor Sentinels.<ref name="ptk"/>

The physical appearance of Abaddon's avatar is described as massive in size, having a face neither male nor female, radiant, exquisitely terrifying, heartbreakingly wondrous. Its coloring is indigo, and it has massive wings as well.

Abaddon is Hebrew for "destroyer" or "destruction" and is also the name of an angel or demon in the Bible.

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