Bio: Adam was born in ancient times, right before evil was invented by the thug Ibac and his army. Ibac enslaved Adam's people and family, killing most of them exept his nephew Aman.
Adam escaped and freed Aman, and together they found the powerul Wizard who gave Aman the Shazam powers. Adam was jealous however, and stole them from Aman when he was about to change into Shazam.
Adam got the powers, killed Ibac but was stopped by the Wizard. He returned in the present day after Dr. Sivana found Adam's tomb. Adam learned that Billy Batson had become the new Shazam and fought him.
Billy confronted Adam with what he had done in the past and challenged Adam to face him without both using their powers. Adam agreed and changed back to himself for the first time in centuries. This caused Adam to turn into dust, and he was now finally defeated.