Mr Freeze

Intro Batman, who was poisoned by Joker with the latter's blood, went to find Freeze in order to get the cure. He discovered that the Penguin had kidnapped Freeze, and tracked him to the Museum. Batman soon found Freeze locked in a display case under a heat lamp, and was barely staying alive with the use of a plug that injected liquid nitrogen into his body, which kept it at sub-zero temperature. Batman got Freeze his suit and his freeze gun back and brought him the Penguin. Freeze got revenge by stepping on the Penguin's broken hand, only eased up when Batman told him to stop and locked the Penguin in one of his own display cases. Batman asked for the cure, but Freeze explained that it was too unstable for use. Batman realized that he needed to get the restorative element the cure required: a sample of blood from Ra's al Ghul. Freeze returned to the old GCPD Building at Amusement Mile while Batman went after Ra's. After Batman recovered the blood sample, Freeze was able to complete the cure and quickly locked it away in his safe. Batman demanded the cure, but Freeze refused and destroyed one of the two vials of the cure. He informed Batman that Joker had Nora and Freeze ordered Batman to bring Nora back to him, and launched a full-scale attack against Batman. Batman was able to defeat Freeze and smashed the protective dome around his head to punch him, but stopped after a Joker hallucination from his worsening health. When Batman attempted to retrieve the cure, however, he discovered that Harley Quinn was able to break into the safe and stole the other vial. Batman pursued her, at the insistence of Freeze, and agreed to also look for Nora. In exchange, Freeze gave Batman the Freeze Blasts that he had developed to help him break into the Steel Mill.