Knockout. After a group of mobsters put out a hit on Lois Lane, Killer Frost rescued Lois from Solomon Grundy, only to then leave the reporter bound and gagged on a set of train tracks, hoping to take the credit and reward for Lane's death. Her plan was foiled by Superman who rescued Lois before the train could hit. Killer Frost was later freed when the DEO refrigeration truck transporting her crashed. Effigy happened upon the crash and she discovered the heat from Effigy's pyrokinetic abilities enabled her to kiss Effigy without him freezing over. The two had a brief flirtatious partnership that dissolved when Effigy lost patience with her lecturing on how to defeat Green Lantern. After Green Lantern buried them both under a mountain of snow, Effigy escaped and abandoned her to be apprehended again. In the Superman/Batman "Public Enemies" arc, Killer Frost was one of many supervillains seeking to earn a $1 billion reward offered by President Lex Luthor to sanction Superman and Batman. She teamed with Mister Freeze, Icicle (Cameron Mahkent) and Captain Cold in an attempt to ambush the two heroes in Washington D.C., but all four were defeated. They attacked in a second wave, along with more villains such as Giganta and Gorilla Grodd, but a similar backup of superheroes battered them all into submission. It was later discovered that this ice-themed team of villains was being mind controlled by Grodd. Dr. Light hired Killer Frost and Mirror Master to attack Green Arrow and Black Lightning at a hospital in Chicago, Illinois, where Kimiyo Hoshi was being held. Green Arrow stopped Killer Frost by firing an arrow filled with Greek fire into her thigh. Unable to absorb the heat from the arrow, she was defeated. Around this time, Lincoln discovered that she had contracted cancer, and tricked Jason Rusch, the new Firestorm, into curing her. With her health and powers restored, Killer Frost went on a rampage, only to be defeated when Jason's abilities reversed the alterations to Lincoln's body, returning her cancer. Killer Frost returned during the events of One Year Later, where she had apparently entered into a relationship with Mr. Freeze. Together, the two villains went on a killing spree in Manhattan, hoping to draw Firestorm into an elaborate trap. Once the hero arrived, Killer Frost used a device to send both of them into space, where she sought to absorb