When Hoppy was trying to convince Mary to become a superhero again, the rabbit used a basic spell to teleport her to a bank, which was being stolen by the Master of Disaster. Seeing the hostages in danger, Mary decided to say the magic words once more to stop the criminal and rescue the hostages.
Mary struggled as she had to deal with the fact that her powers increased, as she didn’t had to share the magic of Shazam with her siblings, but in the end she was able to defeat him and remove the pice of technology that gave the Master of Disaster his powers.