The Soul, Severed (Audio Drama)

The Soul, Severed is the fortieth audio drama for The Horus Heresy series that was not originally released as part of an anthology or other release. The Soul, Severed was first released as an audio drama in December 2016 as part of the Black Library's 2016 Advent Calendar, on day 9.

Official Synopsis
As Lord Commander Primus, Eidolon leads the Emperor's Children in the absence of his Primarch - who even knows where the Daemon Prince Fulgrim resides, now? But a challenge from within the Legion forces Eidolon to confront one of his rivals, the ambitious Archorian, a capable officer and tactician who would see the Legion returned to glory. Dissent is unacceptable. It is time for the Kakophoni to be set against their erstwhile brethren.