"At the start of the War in Heaven, all-seeing Asuryan asked the crone goddess Morai-heg what would be the fate of the gods. The crone told Asuryan that she would look across the tangled skein of the future to discern what would become of the gods. Long she followed the overlapping threads, following each one on its course to the ending of the universe, and yet she could find no answer for the lord of lords. All paths took the crow lady into a place of fire and death where she could not venture further. To find the answer she sought, the crone followed Khaine the bloody-handed killer who would wage war on the other gods and the mortals, and took from him a thimbleful of his fiery blood. Returning to her lair, Morai-heg set the burning blood of the war god upon her balance. Upon the other side of her scales she coiled up the thread of fate belonging to Eldanesh.
All was equal. The crone returned to Asuryan and he demanded the answer to his question. Morai-heg told the lord of lords that the fate of the gods was not his to know. The mortal Eldanesh and his people would decide if the gods survived or not."
"Do not countenance death, dispel thoughts of defeat, think only of winning. Morai-heg was fickle, but it is in our hands, to shape our own future. Responsibility, to create our own fate, lies within our own grasp. To kill and not to die, to slay and not to fall, this is the end we seek."
"The Raven ― Messenger of Morai-heg. One of the most powerful runes, the Raven can be used only by the most experienced seers, for it can be a wayward guide to the unwary. The eyes of Morai-heg see all, and the Raven leads the follower to a single point of fate, from which there is no escape. Such nodes of destiny are rare, for the future is eternally mutable, but where they exist, the Raven will find them."
"The Crone Worlds ― When the ancient empire stretched across the stars, the heart of civilisation was located at the Wheel of Destiny, our first world where Eldanesh was born at the hub. It was from the Wheel of Destiny that Morai-heg spun that fate of the eldar race, and about that wheel all things revolved, for good or ill. Populous were the worlds of the Wheel, and their art and fashions were considered the height of society. As with everything else, it was from the Wheel of Destiny that the strand of the Great Enemy was spun. The first of the sects and cults were created here, and from the Wheel of Destiny that poison spread through the empire. When the Fall came and the Great Enemy was born, it was Morai-heg that was consumed first, the Wheel of Destiny absorbed into the body of She Who Thirsts. Ever they have belonged to her and so now those worlds, once the heart of civilisation and now the heart of the Eye of Terror, are known as the crone worlds."
All quotes I got.