In the Marvel Comics storyline titled “One More Day,” Mephisto makes a deal with Peter Parker, also known as Spider-Man. This controversial storyline, written by J. Michael Straczynski and Joe Quesada, was published in “The Amazing Spider-Man” issues #544-545, “Friendly Neighborhood Spider-Man” #24, and “The Sensational Spider-Man” #41.

The central deal between Mephisto and Spider-Man revolves around a deeply personal and tragic event: the mortal injury of Aunt May Parker. In the preceding “Civil War” storyline, Aunt May is shot and left in critical condition. Desperate to save her life, Peter Parker seeks help from various sources, including Doctor Strange and Tony Stark, but none can offer a solution that would spare Aunt May’s life.

Enter Mephisto, the demonic entity with a penchant for soul bargains. Mephisto offers Peter and his wife, Mary Jane Watson, a deal. In exchange for Aunt May’s life, Mephisto proposes erasing from existence Peter and Mary Jane’s marriage. The idea is that their love is a unique and powerful force, and by eliminating their marriage, Mephisto would gain a significant victory.

In a moment of desperation and love for Aunt May, Peter and Mary Jane reluctantly agree to the deal. Mephisto alters reality, erasing the knowledge of Peter Parker’s secret identity from the public and undoing his marriage to Mary Jane. Aunt May survives the gunshot wound, but the cost is the erasure of a significant portion of Peter’s personal life.

The storyline was met with considerable controversy and criticism from fans who were unhappy with the retconning of Peter Parker’s marriage, which had been a central aspect of the character for many years. “One More Day” remains a notable and debated storyline in Spider-Man’s comic history.