The Last Remembrancer (The Horus Heresy #Short Story)

In a secret fortress on the dark side of Titan, Rogal Dorn and Iacton Qruze meet with a prisoner. That prisoner has a tale to tell, of heroes and monsters, of honour and treachery, of life and death. He has stood at the side of the Warmaster himself, and he has a message for the Imperial Fists primarch. But can he be trusted? And can he be allowed to live? Rogal Dorn must decide the fate of the last remembrancer.

Read it because
This is where the dream of Imperial Truth ends. Rogal Dorn and Iacton Qruze are forced to confront the truth that Horus is coming, and he has a plan...