The Horus Heresy: Vengeful Spirit

‘Horus had called the dark and savage furies latent in the most ruthless, contradictory and ill-starred power of the Immaterium. He had conjured up the fearful idol of an all-devouring Molech of which he was the priest and incarnation. All his powers, hitherto dissipated and scattered, were now concentrated and directed with terrible energy to one terrible aim.’

– from The Age of Revolution: Suppressed Monographs of Choirmaster Nemo Zhi Meng