"I used to play chess, but card games and gambling aren't really my style. I generally don't play games I can't win."

It's a simple truth, softer than his outright arrogance. It might be interesting to humiliate someone so proud, she's done it before. It's always fun to use people against themselves. And yet, it serves her no purpose here, and with all the abilities on display, she doesn't know if she can win. So it's better to not play.