The Aphotic Blade, known as the "Bringers of Despair" among their enemies, are the Chaos Terminators of the Black Legion who serve as the elite bodyguard of Abaddon the Despoiler, the Warmaster of Chaos and ruling Chaos Lord of their Traitor Legion.
After he assumed full control over the Traitor Legion that had once been the Sons of Horus in the wake of the Horus Heresy, Ezekyle Abaddon formed from the newborn Black Legion's ranks a personal bodyguard, known as the Bringers of Despair, among other dark titles.
Selected from the strongest and most vicious of his Chaos Terminators, these fearsome warriors would become a terrifying sight, their arrival announcing the presence of the Despoiler himself upon the battlefield.
- Black Legion: A Codex: Chaos Space Marines Supplement (6th Edition) (Digital Edition), pg. 20
- Black Legion (Novel) by Aaron Dembski-Bowden, Ch. 12
- The Aphotic Blade - Explanation of Aaron Dembski-Bowden