Outcast Dead - Arrival of Magnus the Red: While the Crusader Host was imprisoned inside The Vault, the Primarch Magnus the Red attempted to contact his father, the Emperor, to warn him about Horus' betrayal and his plans for inevitable insurrection. The Crimson King only learned of these plans after he made contact with Horus in the Warp while the Warmaster lay near-death in the Temple of the Serpent Lodge on the Feral World of Davin. It was there that the Chaos Gods, acting in rare concert, successfully corrupted him by appealing to his ego and his fear that the Emperor intended to betray the ideals of the Great Crusade and declare himself a god. Magnus' attempt ultimately failed and resulted in the Emperor dispatching the Space Wolves Legion to Prospero to return Magnus to Terra in chains. The Emperor was deeply angered by what he saw as Magnus' violation of the Imperial edicts issued at the Council of Nikaea that forbade the use of psychic abilities and sorcery.Magnus caused untold damage to the Emperor's attempts to open up the Webway to humanity deep within the bowels of the Imperial Palace, destroying the palace vault's protective psychic wards, which allowed Warp entities to launch an incursion into realspace through the Webway portal on Terra. Although weak and easily destroyed, these Warp creatures passed on a vision of the ultimate outcome of the Horus Heresy into the mind of Aniq Sarashina, the Mistress of the Scholastica Psykana, before they were destroyed by Major General Maxim Golovko and his Black Sentinels. This dark vision included the knowledge that a true Imperial victory over Horus and the Forces of Chaos would prove impossible. Instead, the Emperor would be forced to sacrifice His continued leadership of the Imperium in order to prevent Horus from claiming a total victory and damning Mankind to eternal servitude to the Ruinous Powers that would result in the ultimate extinction of the human race.The cost for this salvation would be terrible -- without the Emperor's active guidance, the Golden Age of the Imperium of Man would come to a tragic end, and be replaced by an age characterised by religious superstition, technological stagnation, ruthless tyranny and endless war. Sarashina was unable to pass this vision on to the Emperor, as the exposure of her mind to the full power of the Warp quickly killed her. Sarashina instead passed the information into the mind of the unsuspecting Astropath Kai Zulane. Zulane was unable to extract the message from his own mind due to his recent inactive time as an Astropath. Because of this, Zulane was taken to The Vault by the Custodians for psychic interrogators to tear the information from his mind.Although Magnus' attempt to warn the Emperor ultimately proved fatal for both himself and his Legion, it did allow Adept Exemptus Atharva to witness what had happened to Astropath Zulane and to understand that the knowledge inside Zulane's mind was of the utmost importance to the survival of the Imperium. While Atharva analysed this information, Kai Zulane was locked inside a cell within The Vault with two psychic interrogators, Adepts Hiriko and Scharff. Atharva quickly learned of Zulane's location using his psychic abilities. It was at this point that Atharva realised he needed to escape from his cell, rescue Kai Zulane and escape from Terra.