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Though grievously wounded and forced to fight a guerrilla war on Isstvan V for the next 98 days he escaped the slaughter with a handful of loyal Space Marines thanks to the arrival of a small Raven Guard navy led by [[Space Marine Captain|Captain]] [[Branne Nev]]. Captain Branne had been left as reserve on Deliverance and he departed the moon only due to strange dreams haunting the nights of Praefector [[Marcus Valerius]], the commander of [[Therion Cohort]], a loyalist [[Imperial Army]] [[Regiment]]. Unbeknownst to both sides, the [[Alpha Legion]] had allowed Corax's escape to further the plans of [[Alpharius]].{{Fn|2}} On quitting the Isstvan System, Corax sent back to Deliverance all the remaining ships while he himself headed to Terra to seek the counsel of The Emperor. The Primarch was desperate as the Imperium was collapsing, his Emperor needed warriors that Corax could not provide. Moreover, Corax was not granted permission to see The Emperor due to his workings on the man-made corridor to the Eldar [[Webway]].{{Fn|2f}}

The Emperor, sensing his son's desperation, was somehow able to divert part of his psychic might in order to grant Corax what he was looking for. Through a psychic vision Corax asked for a rapid and effective solution to restore his legion's might. The Emperor, feeling the righteous intent behind his son's question, implanted in his brain some selected memories concerning the project for the creation of the Primarchs and the exact place where the ancient laboratory was to be found. However, stated The Emperor, the laboratory was well guarded by a complex system called "The Labyrinth"{{Fn|2g}} and it was up to Corax himself to find a way to pass through it. Corax was successful in this task and what he obtained was the common genome all primarchs shared. From this genome, through tough selection, The Emperor created each of the twenty granting each of them some particular and well defined traits (such as psychic powers or increased strength) along with a number of commonly shared feats (increased growing rate, regenerative powers, intellectual acumen and so on).{{Cite this}}

===Post-Heresy===

When ultimately he managed to rebuild his Legion, the [[Horus Heresy]] had ended and [[Roboute Guilliman]]'s Codex edicts that the Legion had to be split in smaller Chapters. Knowing that Guilliman's vision was true, Corax split his forces but remained unable to forget the growling monsters that he had personally created. After pondering for hours as to what should be done he decided to administer the Emperor's peace to the ones who remained, praying for their souls and his. Then wracked with guilt he locked himself in his chamber in the Ravenspire begging for the Emperor's mercy{{Cite This}}.

Nobody knows if he received the absolution he required but a year to the day after he had locked himself in, he left the tower and Deliverance on a course toward the [[Eye of Terror]], never to be seen by the Imperium again. His last recorded words were "never more." {{Cite This}}

Corax went on to hunt the traitor Primarchs, seeking revenge for the [[Drop Site Massacre]]. At some point he became mutated by the powers of the [[Warp]], turning into a creature made of darkness and shadow itself. Using his new abilities, Corax wreaked havoc on a [[Word Bearers]] [[Daemon World]] in the [[Eye of Terror]]. Far beyond the abilities of average Word Bearers, the [[Daemon Primarch]] Lorgar himself appeared before Corax and the two engaged in a vicious duel. Corax managed to dominate the battle, forcing Lorgar to retreat and close the portal he had arrived from. As Lorgar vanished, Corax vowed that he would hunt down and slay the Daemon Primarch.{{Fn|13}}

*{{Endn|16}}: [[The First Wall (Novel)]] - ''Limited Edition Artwork''

*{{Endn|17}}: [[White Dwarf 478]], pgs. 107-109

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