First created in 1978, Killer Frost has undergone more than a few transformations. She began life as the hero Crystal Frost before finding more popularity under her current name. You might recognize her from her appearances on the Justice League animated series; you might recognize her from The Flash. She’s a deadly and versatile force to be reckoned with. If El Diablo really is down for the count, it wouldn’t hurt to have another villain capable of elemental destruction.