A Thousand Sons: The Horus Heresy, Book 12 (Unabridged‪)‬

A Horus Heresy Novel

Censured at the Council of Nikea for his flagrant use of sorcery, Magnus the Red and his Legion retreat to their homeworld to continue their use of the arcane arts in secret.

Listen to it because

One of the most tragic tales of the entire Horus Heresy unfolds as the Thousand Sons are brought low by their relentless quest for knowledge. Magnus is sure that he knows better than the Emperor – but isn't that what caused Horus to fall as well?

The story

Censured at the Council of Nikea for his flagrant use of sorcery, Magnus the Red and his Thousand Sons Legion retreat to their homeworld of Prospero to continue their use of the arcane arts in secret. When the ill-fated primarch foresees the treachery of Warmaster Horus and warns the Emperor with the very powers he was forbidden to use, the Master of Mankind dispatches fellow primarch Leman Russ to attack Prospero itself. But Magnus has seen more than the betrayal of Horus – and the witnessed revelations will change the fate of his fallen Legion, and its primarch, forever.