Archaon: Everchosen

In the north of the world the forces of Chaos gather, awaiting their moment to strike. At their head is the Everchosen, the warrior who will lead the final, cataclysmic assault that will usher in the End Times and the reign of the Ruinous Powers. But he was not always thus - he was once a man, a devout servant of the warrior-god Sigmar. What could cause such a soul to fall to the worship of the Dark Gods? What dark events could have put a knight of the Empire on the path to becoming a harbinger of the world's end? And just who was the man who will become known to all as Archaon?