Mr. Freeze

Victor Fries was transformed into a being who could only survive in subzero temperatures by an accident in which cryogenic chemicals he was working with spilled all over him. He is now the Gotham-based villain Mr. Freeze.

History
Mr. Freeze was hired by Lex Luthor when Luthor tried to take over Gotham City.

He later was part of the Riddler's "Magnificient Seven" group that went to Metropolis to fight Superman. Mr. Freeze's freeze gun proved to be much less formidable than the Man of Steel's freezing breath.

Freeze was later hired by Cyborg Superman along with several other villains in his attempt to take out several Justice League members while he was posing as the real Superman. Cyborg Superman especially chose Mr. Freeze to take out Firestorm, who Freeze seemingly killed using his freeze gun; however, Firestorm would later prove to still be alive and continue to be a member of the League.

Freeze was subdued by Batman, Nightwing, and Robin while robbing a diamond store.