Dr. Louise Lincoln was a colleague and friend of Crystal Frost, the villainess known as Killer Frost. After Frost died, she decided to repeat the experiment as a last respect to her former mentor, and became the new Killer Frost. She became just as ruthless as her predecessor and began her own personal vendetta against Firestorm, who she blamed for Frost's death. She briefly served as a member of the Suicide Squad and sold her soul to Neron for more power.
Underworld Unleashed
During the Underworld Unleashed event, Killer Frost attacked Hawaii, freezing part of the islands before being stopped by Superboy and Knockout. Killer Frost was later freed by Effigy and the two had a brief flirtatious partnership before she was apprehended by Green Lantern.Killer Frost was one of many super-villains seeking to earn a $1 billion reward offered by President Lex Luthor to sanction Superman and Batman, whom he considered treasonous. She teamed with Mister Freeze, Icicle, and Captain Cold in an attempt to ambush the two heroes, but all four were defeated. It was later discover that this ice-themed team of villains was being mind controlled by Gorilla Grodd.[1]Doctor 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 soundly defeated by Green Arrow.
One Year Later and Countdown
Killer Frost was later battled the new Firestorm, until Lex Luthor, Joker and Cheetah arrived, subdued Firestorm, and invited her to join the new Injustice League.