Day of Vengeance is one of four limited series leading up to DC Comics' Infinite Crisis event. It focuses on the Spectre and other magical beings of the DC Universe, especially a hastily formed group known as the Shadowpact. The series has tie-ins to other ongoing DC Comics series, including JSA #73-76 and Blood of the Demon #6-7. The events of this series were preceded by the story arc teaming Superman and Captain Marvel from Action Comics #826, Adventures of Superman #639 and Superman #216.