""One unbreakable shield against the coming darkness, One last blade forged in defiance of fate, Let them be my legacy to the galaxy I conquered, And my final gift to the species I failed."

— Inscription upon the Arcus Daemonica, attributed to the Emperor of MankindThe Grey Knights are the most mysterious of all the Imperium's warriors. Their creation was the culmination of a plan conceived in the dying days of the Horus Heresy, hidden from even the Emperor's armies lest it be uncovered by His foes. Even now few in the Imperium of the late 41st Millennium know of their existence, and those that do possess only fragments of the truth. Legends and myths surround the Grey Knights, and those tales told about them are filled with broad misconceptions and fanciful lies. The vast hordes of Humanity know nothing of the Grey Knights, and the handful of citizens that have heard the name uttered assume them to be an arm of the much-feared Inquisition or a Chapter of the mythical, superhuman Space Marines. Some of the stories and fables taught by the Adeptus Ministorum hold the barest hints of the existence of the Grey Knights, but they are portrayed as silver-armoured angels, ghostly manifestations of the God-Emperor or shimmering reflections of the saints themselves as often as not. Those soldiers that have fought alongside the Grey Knights and retained both their lives and their minds recall them only as Astartes of an unknown Space Marine Chapter, their unique weapons and psychic powers attributed to forgotten technology and tactical doctrine. Other Space Marines know better should they see a Grey Knight in battle, but are wise enough not to dwell long in thought about these mysterious warriors."