Extermination Day happens once a year in hell, on New Years Eve. When clockwork tower in the center of the Pride Ring of Hell rings, it means the extermination has begun. Extermination Day is when the Exorcist angels, led by Adam and Lute, fly down to hell and kill as many demons and sinners as possible to help with Hells’ overpopulation. The exterminators are ruthless, and enjoy their violent and gory acts. They wield spears, swords, crossbows, daggers, and more. They kill for 24 hours.