Killer Frost

Emerging from the Bronze Age in 1978, Killer Frost made her chilling debut in Firestorm #3, brought to life by writer Gerry Conway and artist Al Milgrom as one of the Nuclear Man's most formidable antagonists. Over more than three decades, she haunted the pages of The Fury of Firestorm and Justice League of America, crossing paths with heavy hitters like The Flash and Hawkman along the way. With a key-issue appearance to her name and a legacy that stretches well into the 2000s, she's a villain whose cold menace left a genuine mark on DC's Bronze Age mythology — and a rewarding discovery for any collector digging into Firestorm's rich rogues' gallery.