Seven of Swords
Futility
UPRIGHT: Betrayal, deception, getting away with something, acting strategically
REVERSED: Imposter syndrome, self-deceit, keeping secrets

This is the card of imposters and lies — like, say, your friend being convinced you're a wizard when you're really just a researcher, or being named royal crystaller when again, you're really just a researcher and feel deeply unqualified for the role. Although he's 'getting away with it' for now, Sunburst is always self-consciously looking over his shoulder, sure that he's going to be found out.