Threxos Hellbreed is a Chaos Lord of the Black Legion and the newest member of the Chosen of Abaddon, the four greatest champions of the Warmaster of Chaos. Threxos Hellbreed is the current Admiral of the Black Legion's Black Fleet and also the new master of the Hounds of Abaddon warband. He replaced the former Lord Purgator of the Chosen of Abaddon, Urkrathos, after that Daemon Prince's death on Cadia during the 13th Black Crusade. Hellbreed has won great favour with his patron Chaos God, Khorne, due to his skills at launching ship-to-ship ambushes. He has earned a reputation for initiating spectacular boarding actions.
- Codex Heretic Astartes - Chaos Space Marines (8th Edition), "Black Legion Warbands," pg. 19
- Gathering Storm - Book One - Fall of Cadia (7th Edition), pp. 36-53