Pol Krinn is a native of the planet Braal, where all of its natives are born with the ability to manipulate and generate magnetism. Pol Krinn's brother is Rokk Krinn, and known to the world as Cosmic Boy, the founder of the Legion Of Super-Heroes. The Krinn family moved from Braal to Earth to be close to Cosmic Boy. Three criminals use an old extortion scheme known as 'fireballing' and decimate a couple of neighborhoods including where Rokk's family lived. Pol and their father barely survive and the mom dies from the radiation. After recovering, Pol Krinn decides to enter the Legion Academy to follow in Cosmic Boy's footsteps, even donning his brother's old costume. In the Legion Academy, Pol Krinn developed his magnetic abilities and took on the name Magnetic Kid, as was tradition in the Legion Academy to take on a superhero name. While in the Legion Academy, Magnetic Kid formed close friendships with Tellus and Shadow Lad.
During a recruitment drive when the Legion of Super-Heroes was found wanting new members, Magnetic Kid applied for membership and was accepted. During this time period, Cosmic Boy took an extended leave from the team, so the brothers never served on the team together. Magnetic Kid was killed in the line of duty, sacrificing himself, when the Legion of Super-Heroes were involved in the Magic Wars, where magic prevailed over science. Pol Krinn sacrificed himself so that the Sorcerer's World could be opened and all the Legionnaires could fight the source of the problem. A statue has been erected in his honor along with other fallen Legionnaires in Shanghalla.
Magnetic Kid is a Braalian and, like all natives of Braal, has the ability to generate and manipulate magnetism. Magnetic Kid has extensive training thanks to his time in the Legion Academy and has some skills in unarmed combat and a unique approach to learn different applications of his magnetism.
- Weight: 150 lbs
- Eyes: Blue
- Hair: Black