7 of Swords, or 'Futility' is a sign of deception, getting away with something, or strategy; reversed, it means imposter syndrome or keeping secrets. I chose Sunburst because he's not actually the big impressive wizard he was meant to be in the episode that introduced him -- I'm sure he feels a certain amount of imposter syndrome now that he's the Royal Crystaller.

I mean, there's basically no symbolism in this one. He's doing something wrong and getting away with it, but he's afraid he'll be caught. Sometimes these things are just literal.