|Citizen of the United Planets without a criminal record.|
|Nation or Planet of Origin|
|Legion of Super-Heroes|
|Base of Operations|
|United Planets Space of the 31st Century|
Biologically typical Braalian possessing powers of magnetism enabling an ability to attract, repel or cause stress in magnetic substances and grant a limited ability to fly.
Exceptional athlete with leadership skills.
Legion Flight Ring: Two-way communication device worn on the finger enabling the wearer to fly and disrupt electronic tracking systems.
Adventure Comics Vol. 1
Legion of Super- Heroes Vol. 1, 2, 3, 4, 5, 6, & 7
Superboy and the Legion of Super-Heroes Vol. 1
|Adventure Comics Vol. 1 #247 (April, 1958)|
|Otto Binder & Al Plastino|
Having highly developed magnetic skills at an early age Rokk Krinn became Braal's greatest professional MagnoBall player, enabling him to support his impoverished family. His many fans nicknamed him "Cosmic Boy," a title he continues to use with pride.
On a galactic MagnoBall promotional tour, Krinn, along with Imra Ardeen (Saturn Girl) and Garth Ranzz (Lightning Lad), prevented the assassination of interplanetary entrepreneur R.J. Brande. Impressed by the teens' bravery, the industrialist convinced them to form the Legion of Super Heroes.
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