Prodigy -/ NYSM 
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 @insatiable