The Horus Heresy had already ended, but after Horus's great rebellion, Chaos began appearing with increasing frequency and gradually became the Imperium of Man's foremost enemy.
And the planet where Gao Lanlan and the others were—the one she had casually named "Blue Star," then summoned Earthling players to descend upon in Ork shells; the world corroded by the Warp and the forces of Chaos, ravaged and poisoned by Demons and Chaos cultists, and now withering away—was absolutely not an isolated case in the galaxy. It had become the norm!
In order to fight those dangerous, pervasive, terrifying enemies, the Emperor and the hero Malcador, before the Emperor took his seat upon the Golden Throne, followed their original plan and found twelve capable individuals utterly loyal to the Imperium, as well as eight Astartes from the traitor legions who still remained loyal to the Emperor, former Ranger Knights, and others. Together, they formed the first eight Grand Masters and the foundation of the Grey Knights.
Unlike the other legions, their founding differed from that of the other twenty Astartes space marine legions. Their genetic source came from a rarer path and had also undergone genetic harmonization.
As for the specifics, there was no need to elaborate here.
In short!
Before finally facing the traitor Horus, the Grey Knights were the Emperor's last gift to humanity!
Whether battling the terrors of the void or safeguarding humanity, the Grey Knights would be a steel defensive line gleaming with silver light before the Demons of Chaos—mysterious and unshakable!
As the Imperium's most powerful and last-created perfect warriors, the Grey Knights possessed unwavering will and strict discipline. They remained ever vigilant against demonic incursions, always ready to answer the followers and hounds of the dark Chaos gods with fury!
When the Grey Knights, clad in