Draigo ultimately rose to become the Supreme Grand Master of the Grey Knights in early 901.M41, following the death of the previous lord of the Chapter at the hands of the Daemon Primarch Mortarion.
Bakgrunn
Kaldor Draigo's story began during the Daemon incursion on the Imperial world of Acralem in 799.M41. The Daemon Prince M'kar the Reborn and a daemonic army from the Warp had invaded the planet, and intended to corrupt not only Acralem, but the entire Vidar Sector of which it was a part.
Against such a terrible daemonic threat only the Grey Knights could effectively defend the Imperium . Joined by 9 Astra Militarum regiments and companies of Space Marines drawn from the Astral Knights and Flesh Tearers Chapters, the 3rd Brotherhood of the Grey Knights came to the rescue of Acralem with Draigo among their ranks.