Warning: contains spoilers for Poison Ivy #19Poison Ivy’s new origin completely redefines her supervillain identity, and confirms her one true nemesis. Beginning life as a Batman villain and over time morphing into something more, her life has been marked by tragedy and manipulation, and in Poison Ivy #19, her earliest years are revisited, and new revelations come to light, including exactly when she “became” Poison Ivy, as well as her relationship with Jason Woodrue.

https://screenrant.com/poison-ivy-new-origin-supervillain-identity-true-nemesis/