Emerald was raised around magic. It became her life when she was young, practicing her illusions while her father did magic of his own. It was fun for her as a child, and as she grew older, it became a way to make money so she and her dad could eat for the next week.
Emerald was there when her father got his card - and she got one of her own that day, by virtue of her own magic. They couldn't possibly say no.
Emerald McKinney could never say no to a challenge, after all.
Invincible: Book One
Cover made by me