Shadow of the Ruiner

The Shadow of the Ruiner is the event that occurred following the formation of the galaxy-spanning warp rift known as the w:c:warhammer40k:Cicatrix Maledictum after the destruction of the fortress world of Cadia during the 13th Black Crusade in 999.M41. The Imperium was split in two by the massive warp rift and hordes of daemonic legions and Chaos Renegade Chapters and Warbands poured forth from the tear in reality from the Immaterium and set upon the worlds of the Imperium like locusts. During a climatic battle that took place between the Chaos Lord of the Crow's Children and Chapter Master of the Penitent Knights, Daedelus' evil was finally eradicated from the galaxy forever and the Chaos Warband was cast in disarray. Tearing itself apart in internecine conflict, only through the iron will and might of the powerful Chaos Sorcerer known as Peredrath the Ruiner, was the Crow's Children brought to heel, and once again, they began to terrorise the galaxy at large under his diabolical leadership, becoming a dire threat to the security of the Imperium.

History
Following the climatic and perhaps predestined duel between Daedelus the Betrayer and the Lord Crusader of the Penitent Knights, Graythorne Crowslayer, the Crow's Children in their entirety were thrown into disarray when their ancient Chaos Lord was finally slain after millennia of commanding them. Threatening to collapse and cannibalize itself, the Warband was soon brought firmly under the iron fist of the Sorcerer, Peredrath the Ruiner. Controlled and kept in their place by the terrible Warp-given powers of the sorcerer, the Crow's Children once again were set upon the galaxy. It bodes ill for the warriors of Asteria that the feared Children are now led by one with much greater vision than Daedelus ever possessed. To the current date, it is unknown what exactly the Warband is doing, but when it is revealed, surely the Penitent Knights will finally face their doom.