A companion piece to Magnus the Red: Master of Prospero, Graham McNeill’s 24-minute Horus Heresy audio drama Morningstar is set just before the Siege of Terra, with Magnus and Ahriman venturing into what remains of Tizca. As father and son explore the ruins of the City of Light, Ahriman questions their purpose in returning to the site of such pain, but Magnus – now largely restored – once more plays the role of teacher, and reveals an unexpected secret to his favoured son. The truth of Morningstar offers power to be wielded, but at a great cost to both Magnus and Ahriman.
