Therefore, the question instantly becomes: How successful is 37-year-old Antonio Díaz, who describes himself as a life-long David Copperfield devotee? The short answer is: He’s very successful. The longer answer is that, doing any number of card tricks (more about them later), his long suit is a boyish charm combined with an ostensible love for the illusions he creates. He also shows off a quick ad-lib wit, even more admirable in a fellow who says he’s only recently become comfortable speaking English.