Robin makes it a Devil's Six (Costs one Devil Power)

Drawing upon the power of the devil on her right shoulder, Robin focused hard on the card that was just upturned. In a shocking turn of events, the number warped and curled, until the image left upon it was a flaming number six, accompanied by a cheeky devil sticking out its tongue. Whatever the real number was, it was lost and replaced with this new card.

"Ha ha ha ha! A six isn't usually such a great number to get in Blackjack, is it? I love watching opponent's squirm when they see it pop up~" Betty giggled to herself, clapping her hands with glee. "Don't say I never did anything for you, Robbie-Baby."