Legion of Super-Heroes (1973-1973) #2

The Legionnaires travel to the past to find out the story behind an ancient artifact that refers to a war between Earth and Krypton. In part two, while the Atlanteans and Kryptonians fight, Brainiac 5 discovers why Earth’s air irritates the Atlanteans and helps them adapt to life under the sea.

Written By:
Edmond Hamilton
John Forte
Cover By:
Nick Cardy