Tempted by boons and offers of power, many mortals have chosen of their own free will to serve alien beings from beyond Urcaen. Infernalist cultists are corrupted and manipulated into surrendering their former loyalties to become willing collaborators in the infernal invasion. Wielding rune-covered ritual blades that whisper to them and pulse with inner heat, the most prodigious killers are elevated to dark sentinels, bestowed with more formidable great swords and entrusted to take on special tasks.