Rokk Krinn was the leader of the Legion of Super-Heroes under the code-name Cosmic Man. He granted membership to Batman, who was taken out of the past by his brother Superman.


  • Braalian Physiology: Cosmic Boy is a Braalian who have the natural ability to lift and manipulate metal. Cosmic Boy can produce a number of effects.




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Legion of Super-Heroes member
This character is or was a member of the Legion of Super-Heroes from the 30th/31st Century, in any one of their various continuities. Including but not limited to, Original Legion, the Reboot Legion, and the Prime Legion.
This template will categorize articles that include it into the "Legion of Super-Heroes members" category.

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