Black Adam exploited that hate to recruit him with his power as Black Adam Jr. until the boy realizes the villain's evil and reconciled with the Marvels, which led to Captain Marvel bestowing him a portion of his power to become Captain Marvel Jr.
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Created in 1942 by writers Otto Binder and Ed Herron, and Fawcett artists C. C. Beck, Mac Raboy, and Marc Swayze, the team is an extension of Fawcett's Captain Marvel franchise, and includes Marvel's sister Mary Marvel, their friend Captain Marvel Jr., and, at various times, a number of other characters as well.