Lucius: The Eternal Blade is the eighteenth audio drama for the Horus Heresy Series that was not originally released as part of an anthology or other release. Lucius: The Eternal Blade was published online in December 2013 by the Black Library as a part of the 2013 Holiday Advent Calendar, on day number 21. The title was also published as part of the Legacies of Betrayal main series anthology novel.
Renowned as one of the finest duelists the galaxy has ever known, Lucius seeks ever greater challenges against which to test himself. After the Emperor's Children Legion scattered in the wake of their Primarch's apotheosis on Iydris, he finds his way into the domain of a similarly legendary swordsman -- Sanakht of the Thousand Sons. But which of these infamous warriors carries the greater favour amongst their new masters?
- Lucius: The Eternal Blade (Audio Drama) by Graham McNeill