BabyKellhus - are you perhaps thinking of the scene in The Great Ordeal when Mimara sees the Dunyain as a whole as damned upon viewing the bones of the Whale Mothers?
p 160-161 "Suddenly she sees Him, her stepfather, Anasurimbor Kellhus I, the Holy Aspect-Emperor, high on his throne, wreathed in darkness and fury, a malignant cancer cast across the far corners f the world..."