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Cosmic Boy (Rokk Krinn) is a superhero in the 30th and 31st centuries of the DC Comics Universe. He first appeared in Adventure Comics #247 (April 1958).  He was the original leader in all incarnations of the Legion.  Cosmic Boy is a founding member of the Legion of Super-Heroes, along with Lightning Lad and Saturn Girl, and he has the superhuman ability to generate magnetic fields. Cosmic Boy's brother, Pol, eventually joined the Legion as Magnetic Kid, but died during the "Magic Wars". Cosmic Boy is one of the few Legionnaires ever to have his own miniseries, which ran for four issues in the mid-1980s as a spin-off of the Legends cross-over.In the pre-Zero Hour Legion, Cosmic Boy was romantically involved with Night Girl (Lydda Jath) from the Legion of Substitute Heroes. "Vi" was on the scene when her fellow Legionnaire was crippled by the dampener during the battle of Venado Bay, and harbored deep guilt for years.  No longer using his codename, Rokk retired to the slums of a demilitarized Braal with his wife Lydda, who gave birth to their son Pol (named for Rokk's brother).  When Reep Daggle reformed the Legion, a powerless Rokk joined up. The former Cosmic Boy continued to serve with honor during the adult Legion's tour of duty, proving that he needed no powers to be a hero. Rokk did however regain his powers shortly before Zero Hour, thanks to a special pair of power gauntlets. He took on the codename Polestar, only to renounce the power gauntlets after they began to affect his mind.  After learning that he was apparently destined to become the Time Trapper, Rokk and the rest of the Legion were erased from history by Zero Hour.

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For more information on Cosmic Boy        DC DATABASE

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Pencils Mike Grell

Coloring Jim Passmore

Pencils Mike Grell

Coloring Eric A. Carr

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