Blasts From the Past, Part 1
Upon discovery of the Phantom Zone projector in his spaceship, Superman makes contact with and releases a prisoner whose sentence is complete. She is a Kryptonian named Mala, and she quickly gains the same abilities that Superman possesses. She soon becomes power-hungry and Superman feels she may have to return to the Phantom Zone. Upon this threat, Mala uses the projector to release her General, Jax-Ur.