Throughout the Age of Myth the skaven burrowed, built and multiplied. Such is the myth that persists amongst the skaven to this day, and such is their singular goal. Then, skittering through the shadows of the void with eyes a-glow, he scattered them into the darkest corners of the newborn Mortal Realms and bade them multiply and conquer the new realities. Empowered as never before, the skaven deity snatched clawfuls of his screeching brood and saved them from final destruction.
Yet this was not the end for the children of the Great Horned Rat. As the mortal world died, so the skaven feasted upon its corpse in numbers beyond count, before being annihilated in turn by the final victory of Chaos.
The Great Horned Rat was the pestilential father of the skaven, that teeming race of ratmen that had long gnawed at the roots of mortal civilisation.
In the last days of the World-That-Was, a fifth deity rose to join the dark pantheon of the major Chaos Gods.