Master of the First (Audio Drama)

Master of the First is the twenty-forth audio drama for the Horus Heresy Series that was not originally released as part of an anthology or other release. Master of the First was published in October 2014 by the Black Library as part of a box set also containing the audio drama The Long Night. The title was later published in prose format as part of "The Horus Heresy Quick Reads Subscription" week on February 24th 2016, and again as part of the Eye of Terra main series anthology novel.

Official Synopsis
The Dark Angels and the Night Lords fought one another to a bloody stalemate during the Thramas Crusade, leaving the First Legion scattered and under-strength. Back on Caliban, those Dark Angels loyal to Luther begin to grow impatient for a return to past glories, allowing the corruption at the world's heart to spread.