The Emperor Wept

The Imperium has decreed that the world of Carnage is to die, to test a new strain of the monstrous Life-Eater virus. Space Marines of the Doom Warriors descend upon the world to deliver its end. But when something unforeseen occurs and the world survives the virus, a single adept of the Magos Biologis – Heironym Rottle – holds the key to the mystery.