Leonard Snart's sister, Lisa, was dying of cancer. Upon learning that the hospital does not have enough energy to power a laser that could save her life, because of an EMP seemingly caused by the Flash, Cold blames him for everything that has happened to him, including a falling out with the Rogues, and decides to break the rules of their "game" and kill the Flash. Captain Cold has undergone experiments that have given him cryokinesis, including the ability to slow down the molecules around him, creating a field of inertia that reduces the Flash's speed to human level, allowing Captain Cold to touch him and effortlessly beat him.
Current Version:
King Cold (Year of the Villain)
Former Version:
Captain Cold (Original)
Captain Cold (Ice Powers)
Captain Cold (Post-Forever Evil)
Captain Cold (Return to the Rogues)