Crisis on Infinite Earths (1985)

Crisis on Infinite Earths is a 12-issue limited maxi-series that redefined the DC Universe by uniting heroes from across multiple Earths to confront a universe-ending threat. Written by Marv Wolfman and drawn by George Pérez, the saga features a sweeping cast spanning DC's decades of history and crystallizes high-stakes tragedy as worlds collide and are reshaped. Widely regarded as a landmark event, it reorganized DC's continuity and ushered in the era of Pre-Crisis and Post-Crisis storytelling that followed.