It's a complicated story, and Billy gives an embarrassed sort of laugh, "...I was supposed to be a sort of analog for Thor." Which probably doesn't make that much more sense, given that all he's explained about his powers is 'magic' is which not exactly what Thor is known for.

He smiles at Steve's advise, wondering if it was just inherent in all Cap's that they be naturally good at this. "I'll keep working on it. Billy's good enough for now."