According to Eldar legend, during the War in Heaven the Outside and the Eldar trickster god Cegorach engaged in duel. As the Outsider, accompanied by four lesser C'tan devoured the stars, Cegorach appeared before the Outsider as challenge. Casting an illusion of itself upon the lesser the C'tan, the Outsider proceeded to mistakenly devour its brethren one by one. Screaming with rage and defeat, the Outsider clutched its head, spasming until it folded upon itself and grew dim.
Another retelling of this tale states that when the Laughing God deceived the Outsider into devouring its brothers, because it thirsted for ascendency. However, the devoured fragments twisted like shards of glass within the Outsider eventually driving it insane. This earned Cegorach the enmity of the Outsider, who shall one day return.[1b]
An approximately five million year old prophecy inscribed by Farseer Lsathranil of Ulthanesh Shelwé claims that when the living dead rise, and the galaxy runs red with the blood of Eldanesh (Eldar), shall the four great C'tan rise. The Outsider will then return, being drawn to the fresh harvest.[1a]
The Outsider is said to have gone into exile outside the Galaxy since then, living within a hollow planet far to the galactic south.
Joagul Maskelyne, a serviceman of the Imperial Navy encountered the astrological engines and twisted geometries of the Outsider as his naval ship exited the Immaterium near the edge of the galaxy. The experience had weakened his sanity and his will to live. His report has been compiled with another report noting an unusual change of course by Hive Fleet Leviathan. No known celestial phenomena is known to exist in the location of the Hive Fleet's manoeuvre. However, auguries revealed a spherical object of unknown origin. The mere ability to have detected it with reflected light indicated either a measurement 32,000,000 times the size of Terra or an albedo range approaching infinity.[1e]
A deep scan image of an object to the galactic south showing a dyson sphere-like has been captured, with the movement of Hive Fleet Leviathan turning course to avoid this unknown object.[1e] This object corresponds to the Eldar-monitored site of Lyriax.
In a vision of the universe's doom, Farseer Maechu of Ulthwé has seen the writhing, inverted geometries of the Outsider curl and tighten around its harvest as they clamber and crawl like vermin around his illogical labyrinth. Its prey have long since lost their sanity save for the false hope that they may escape, with the Outsider seeking to quell this hope.[1d]
- 1: Codex: Necrons (3rd Edition)
- 2: Codex: Necrons (8th Edition), pg. 68
- 3: Dawn of the C'tan - The Death of Light (saved archive page, dated Jan 2007, last accessed 18 March 2020)
- 4: White Dwarf 385 (UK) - Crafting Your C'tan, pg. 62
- 5: Codex: Eldar (4th Edition), pg. 15
- 6: Xenology - pg. 29, Eldar