In this story, there's a gathering at the home of Dan Kane (also known as the superhero Captain Terror) of that issue's heroes: Jack Frost, Rockman, the Whizzer, the Defender and the Vagabond.

More than three decades after Jack Frost's final appearance, Marvel launched The Invaders in 1975, an intentionally nostalgic comic featuring star characters from the Golden Age — Captain America, Bucky Barnes, the Human Torch and the Sub-Mariner — in World War II-era adventures.

Writer and editor Roy Thomas wanted to expand the franchise, so he created a second superteam — the Liberty Legion — with a group of second-string Golden Age heroes including Jack Frost, along with Miss America, the Whizzer, the Patriot, the Thin Man, Red Raven and the Blue Diamond.

Thomas said that there were plans for a Liberty Legion series, but by that point, the sales figures on the Invaders comic were dropping, and Marvel decided against launching a spin-off.

The land that no man really knows... in this great, frozen waste, surrounded by an eternal, deathly quiet, lives a person we have all heard of but few men have seen — the King of the Cold — Jack Frost!

[11] During World War II, he joined with other superheroes to form the team Liberty Legion and protect the United States from Axis home-front infiltration.

With the Legion, Jack Frost battled Namor the Sub-Mariner and the original Human Torch, and protected bystanders from shrapnel with an ice umbrella.

[12] Jack Frost was seen again in a 1991 issue of Captain America, in which it was explained that he had sacrificed himself by melding with a powerful Arctic "ice-worm" monster, in order to neutralize it and keep it from savaging innocent people.

Jack Frost was briefly freed during an encounter with Captain America, before willingly being swallowed by and joining with the ice-worm once more.