The Bone Cage (Warhammer: The End Times)

A group of holy men and women of many faiths – from the Grand Theogonist of the Empire-spanning Sigmarite church to the Fay Enchantress of Bretonnia – are being transported through the wilds of Sylvania in a sinister cage of living bone. At the head of their procession of the dead is Mannfred von Carstein, lord of that benighted realm. But where is he taking them, and to what end? As the prisoners decipher the vampire's goal, they make a desperate attempt to escape and thwart the count's plans - but treachery from within may see them undone.

Read it because
It bridges the gap between 'Sigmar's Blood' and 'The Return of Nagash', and shows the lengths to which Mannfred von Carstein is willing to go in order to achieve his sinister goal.