Titan (Moon) - Titan: So dismissed, Malcador and the twelve departed the embattled palace as unremarked as they had arrived. Yet when the group departed Terra they divided, for their destinies would be separate for a time. The four Imperial lords left to lay the framework of the Inquisition -- that mighty and secretive organisation charged with keeping watch over all arms of the Imperium to prevent both corruption within and attack from without -- while Malcador took the eight Space Marines to the moon of Saturn named Titan.Following the dire events of the Horus Heresy, across the galaxy, forces still loyal to the Arch-Traitor continued to fight the war he had declared, razing planets and claiming dominion over vast tranches of human worlds. The forbidden knowledge shown to Horus that had been the catalyst for his fall from grace bore other more sinister fruit, and dwellers from the other side of reality, the Empyrean, were now abroad in the material realm.Though many at the time of the Heresy believed the word to be childish and loaded with superstition, they came to be called "daemons," for lack of a better and more descriptive term in the Imperial Gothic language. Whatever name given to them, their existence itself was all too horribly apparent. At points all across the galaxy, the Materium had been worn thin and the veil between realities torn open. The Eye of Terror blinked open, casting its malign gaze on the destruction so freshly wrought as world after world became conduits for the unreal to enter the real.The Loyalist Legions were diminished, their fighting strength a paltry fraction of its pinnacle and their Primarchs dead or at each other's throats in the power vacuum that followed the Emperor's internment in the arcane mechanisms of the Golden Throne. While the Emperor had foreseen the myriad dangers humanity faced and created the Legions in His own image to combat them, even He could not have anticipated the monstrous forces now unleashed upon the Imperium. While the Legions had been bred to fight wars on the material realm, this new foe could battle on the immaterial front too, rendering Space Marines little more effective than the common mortal soldier when it came to psychic war.Many of the Legions had once welcomed psykers into their ranks but an Imperial edict at the Council of Nikaea barring His sons from utilising the potential of their Warp-gifted troops had been passed in the years before Horus' betrayal and endorsed by the Emperor Himself, eliminating the Librarius from every Legion. Denied the one weapon that could reasonably have altered the course of the opening stages of the interstellar civil war, in time the Primarchs came to see its true power and the Loyalist Legions gladly welcomed Librarians among their number once again. But one man had always known the capability of that weapon and had foreseen a time when humanity would need to fight the powers of the Warp with powers born of the Warp.Through sorcerous means, the Sigilite had long ago occluded the moon of Titan from the sight and deeds of Loyalists and Traitors alike, covertly building a fortress-monastery and equipping it with forbidden technologies and secret training facilities to prepare the new Chapter in its role defending the Imperium from daemonic incursion. Code-named "Othrys," in the old tongues of Terra it meant "the home of the titans."The symbolism of such a name seemed fitting to the Sigillite. New supplies of gene-seed, newly derived from the genetic material of the Emperor Himself, lay preserved in cryovaults, and fresh-forged armaments stood ready in cloistered armouries. Theirs would not be a full Space Marine Legion, but a Chapter -- a smaller, more tightly knit brotherhood, but one with numbers enough for the task at hand. In addition to the eight founders, thousands of others had been taken to the hidden satellite to serve as ancillaries, Chapter Serfs and the recruits that would form the original Brotherhoods (companies) of the Chapter.Malcador oversaw the initial creation of the Grey Knights, but he could not remain to oversee their evolution, so he selected one of the eight to lead the Chapter in the years to come. So did Janus become the first Supreme Grand Master -- the hand that would guide the Grey Knights through their first challenges.Before leaving Titan for the final time, Malcador forged one last enchantment of arcane technology and psychic accumen, greater than any that had come before it, known as the Warp Nexus. Titan vanished completely from its orbit, hidden from Horus in the most unlikely of refuges -- Malcador had anchored it amongst the tides of the Warp. Protected by Macro-Geller fields and sigilic rites of Malcador's own devising, Titan rode out the tumult of the Warp whilst the rest of the galaxy endured through the last solar months of the Horus Heresy and the tragedy of the Emperor's final battle.For many Terran centuries the Grey Knights dwelt on Titan while the Sigillite kept them hidden from reality, training their minds and arming themselves with the knowledge they would need to go forth and eradicate the daemonic from the material realm. For hundreds of subjective Terran years the Grey Knights trained and prepared, to not only armour their mind from psychic assault but also to turn it into the sharpest blade with which to sever their enemies' links with the corporeal.But knowledge was the most powerful and the greatest of the weapons that they armed themselves with. For hundreds of years the Grey Knights prepared to do battle with the Neverborn, drawing on the entire libraries at their disposal prepared for them by Malcador that were filled with books that listed the rituals of banishment, the rites of warding and, most importantly of all, the true names of hundreds of daemons.