Detective Comics #693 1995

Detective Comics #693, published in 1996, features Batman caught between Poison Ivy and the debut of a new villain, Allergent. Allergent is systematically destroying Gotham's plant life with a potent defoliant, causing immense suffering to Poison Ivy due to her unique connection to the Green. This issue kicks off a two-part storyline, showcasing Ivy's escape from prison and the escalating conflict as Batman tries to protect both the city's ecosystem and its citizens from these opposing forces. It also marks the election of Marion Grange as Gotham's new mayor.