Wonder Woman#177(1968)

An interplanetary conqueror called Klamos and his prime minister Grok are in search of a suitable queen for the monarch. To this end, they capture powerful and beautiful (by the standards of each planet) females from many worlds. From Earth they take Supergirl and Wonder Woman, capturing the former by red-sun radiation and the latter by magnetizing her bracelets together. The women contestants are set against each other in a battle royal, which at first Supergirl and Wonder Woman opt not to actively participate in, feeling that another woman will be the winner and Klamos will send both of them back home. Unfortunately, all the other candidates defeat each other, leaving only the two super-heroines. When they initially refuse to fight each other, Klamos first blasts them with a power-ray mighty enough to affect them both, then tells them that he will unleash his warfleet against Earth unless they go through with the battle. Supergirl and Wonder Woman do fight each other, and, after a tough battle, Supergirl apparently defeats the Amazon and tosses her limp body onto the dais where Klamos and Grok sit. But when Grok and Klamos approach, Wonder Woman springs to life, tossing Grok to Supergirl. The Maid of Might uncovers a wrist-control device which Grok uses to control Klamos, a robot, and manipulates it to destroy Klamos. Wonder Woman tells the people of the planet where they fought that they are to spread the word of their liberation. However, Grok teleports away, vowing vengeance.