Lhoix was an Ulthwé Dark Reaper Exarch, who was among the Craftworld's forces that Farseer Ariniae led to battle against an Ultramarines Company led by Captain Octavius[1a]. The Exarch's Dark Reapers proved to be instrumental to the Craftworld's costly victory over the Ultramarines, as the Space Marines had no answer to their fierce long range firepower.[1b]