Comic Title: Challengers of the Unknown #14
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Jun/Jul 1960
On Sale Date: April 19, 1960 Copyright Date April 19, 1960
Source: Library of Congress, Periodicals 1960

Frequency: Bi-monthly
Cover Price: $0.10
Page Count: 32
Editor: Jack Schiff

Title: "The Man Who Conquered the Challengers"
Pages: 12

Feature(s):
Challengers of the Unknown (of Earth-1)

Writer: France E. Herron
Artist: Bob Brown

Reprinted In:
Brave & the Bold #113 (1974)
Showcase Presents Challengers of the Unknown Vol. 1 TPB (2006)

Feature Character(s)

• Challengers of the Unknown (last appearance in Challengers of the Unknown #13; next appearance in Challengers of the Unknown #14)
• Ace Morgan (last appearance in Challengers of the Unknown #13; next appearance in Challengers of the Unknown #14)
• Rocky Davis (last appearance in Challengers of the Unknown #13; next appearance in Challengers of the Unknown #14)
• Red Ryan (last appearance in Challengers of the Unknown #13; next appearance in Challengers of the Unknown #14)
• Prof. Haley (last appearance in Challengers of the Unknown #13; next appearance in Challengers of the Unknown #14)

Villain(s)

• Multi-Man (Duncan Pramble; first appearance; next appearance in Challengers of the Unknown #15)

Other Character(s)

• Dr. Charles Ferriss (an archaeologist; no further appearances)

Synopsis:
The Challengers accompany Dr. Charles Ferriss on an expedition to locate an immortality elixir created by ancient alchemists. During the night, Ferriss’ assistant, Duncan Pramble, steals the map and locates the elixir. Drinking the potion of "liquid light", Pramble gains super powers and when he dies, he is reincarnated with a new power.

The Challs pursue Pramble, now dubbed Multi-Man, while the doctor creates an antidote. Multi-Man uses his powers to escape the Challengers and steal for his personal gain. He goes through two changes after dying, but the Challs are finally able to capture him alive, using the antidote to remove his powers.