an infected girl and giving her samples of it. Upon examining it, Ivy realizes that the infected girl is already dead and Batman wanted to evoke her sympathy as he is actually seeking for a cure to combat the spread of the disease. She also reveals that, when she was still working at Wayne Enterprises, she had presented her research wrongly as she thought Bruce Wayne wanted something to manipulate people but she was actually researching pheromones to make people feel good. Batman warns Ivy that an unknown strike force is after her, because they know Ivy is able to pull biological weapons from the tree. After Batman helps Ivy in the fight, Ivy synthesizes a selective agent that can destroy the spores without harming the hosts. In "The War of Jokes and Riddles" story arc of Batman, Poison Ivy has allied herself with the Riddler in his war against the Joker. In the arc, when the Riddler was trying to convince her to join his side, she is seen stopping Carmine Falcone's men—who are sent to kill the Riddler—by capturing them in vines. In the "Gotham Resistance" tie-in story arc for Dark Nights: Metal, Poison Ivy controls a jungle-like realm within a Gotham City warped by the dark energy emitted from the dark metal in the cards given by the Batman Who Laughs to various enemies of Batman including Poison Ivy herself. Poison Ivy captures Harley Quinn—who realizes that Poison Ivy isn't herself—Green Arrow, Nightwing, Robin, and Killer Croc as they try to solve what's going on and stop it. They escape when Poison Ivy violently reacts to her plants being harmed during an attack by several members of the Teen Titans and Suicide Squad, who all also have been twisted, as well as a Dark Robin. In the "Source Code" story arc of Batgirl and the Birds of Prey, Poison Ivy infiltrates and tries to take down Terracare, a company whose fertilizers contain a secret ingredient destructive to bee populations. She comes across the Birds of Prey (Huntress, Black Canary, and Batgirl) and Catwoman who were trying to save the Calculator's family held hostage by Terracare. Terracare had namely traced back a data breach to the Calculator who sold the information to Catwoman, so she could steal a vial of the ingredient from Terracare for Poison Ivy. She did this for Ivy, as Ivy once saved her from