Kor Phaeron - Horus Heresy: Kor Phaeron became the "Master of the Faith" for the Word Bearers after their secret conversion to the service of Chaos and began the process of corrupting the entire Word Bearers Legion. With Lorgar finally embracing the worship of Chaos with enthusiasm following his Pilgrimage, it was not long before the Word Bearers were wholly dedicated to the Ruinous Powers. As before, Kor Phaeron served as Lorgar's principal spiritual adviser and led contingents of the Word Bearers in some of the most devastating battles of the Horus Heresy.Kor Phaeron commanded the Word Bearers' surprise attack against the Ultramarines at the Battle of Calth. During the fighting on Calth, Kor Phaeron attempted to turn the Ultramarines' Primarch Roboute Guilliman to Chaos with a shard of the Anathame just as the Word Bearers' First Chaplain Erebus had done with Horus on Davin's moon, but Guilliman only answered by ripping out one of his two hearts in disgust, proving to be immune to the Dark Gods' temptations.Defeated, Kor Phaeron retreated into the Warp aboard the Word Bearers' Battleship Infidus Imperator, pursued by the Ultramarines aboard their flagship, the Macragge's Honour. After luring the Ultramarines into the Warp, Kor Phaeron ordered his crew to turn about and attack, since destroying the Ultramarines' flagship was the next best thing to killing Guilliman himself.However, the Ultramarines' fighting skill and resolve proved the equal of the Word Bearers' zealous hatred, and the Infidus Imperator was destroyed, though not before Kor Phaeron hastily cut a hole from reality into the Warp with the Chaos artefact called the athame and escaped, arriving on Sicarus, the Daemon World inside the Eye of Terror that would eventually become the Word Bearers' homeworld after the Forces of Chaos were defeated at the Battle of Terra.Though the XVIIth Legion achieved a monumental victory of sorts at Calth, it was all a matter of perspective. Piercing the veil of the Warp, Lorgar had heard the whisperings of the Chaos Gods and had witnessed the truth for himself. Yes, Erebus had successfully conjured the massive Warp Storm known as the Ruinstorm at Calth intended to cut off half the Imperium from Terra and prevent several of the Loyalist Legions from providing reinforcements for the defence of the Throneworld.But ultimately, Erebus and Kor Phaeron had failed to achieve their overall objectives: the Ultramarines Primarch Roboute Guilliman was still alive, the Word Bearers had lost half the fleet they had deployed at Calth to an Ultramarines counterattack, and tens of thousands of Word Bearers, including the elite daemon-possessed Gal Vorbak and many thousands of the XVIIth Legion's mortal servants and the Faithful of the Chaos Gods, had been abandoned to a useless subterranean war beneath Calth's irradiated surface while the two Word Bearers commanders had fled.Though Lorgar was somewhat displeased, the base level of success required for the larger movement against the Loyalist forces of the Emperor by the Traitors under Horus had more or less been achieved; the Ruinstorm had been conjured and the rogue elements of the Word Bearers who were the least likely to adhere to Lorgar's vision of the future had been culled.Following Horus' defeat, the remnants of the 9 Traitor Legions fled, along with the other Traitor Imperial forces that now served Chaos, into the Eye of Terror, an area of the galaxy where the Warp bled into realspace, creating a permanent Warp Storm.From Sicarus, the Word Bearers Legion now orchestrates the vast corruption from within that the Imperium suffers at the hands of the various Chaos Cults and witches' covens that Kor Phaeron and his fellow Dark Apostles sponsor across the galaxy.Eventually, the atrocities committed by the Word Bearers allowed for Lorgar's ascension to daemonhood, becoming the equal of a god in the eyes of his Legion. It is said his birth scream as a Daemon Prince of Chaos Undivided echoed across the Immaterium with triumphant vindication, his faith and devotion to Chaos rewarded with immortality and unbridled power. He has since isolated himself within the Templum Inficio on Sicarus where he has remained for thousands of standard years, forbidding anyone to interrupt his meditation, thus allowing the Word Bearers to be taken over by a Dark Council of the Word Bearers' most powerful Dark Apostles.From the two primary bases of the XVIIth Legion in the galaxy, Sicarus and the factory-world of Ghalmek which is located within the Maelstrom, the Word Bearers launch twisted Wars of Faith against the Imperium in the name of the Dark Gods. These conflicts' purpose is to "enlighten" humanity by replacing its worship of the Corpse Emperor with that of the only true divinities of the universe. That this requires the death of billions of people is a price that the Word Bearers are willing to pay to bring the truth first sought by Lorgar Aurelian to the rest of the galaxy.