What the heck does “Opp. Dragons” mean?
You know what “matching dragons” are, because that’s explained on the back of the card. Check the color-coding on the hand you’re asking about. It’s not shown in one color. You know what multiple colors means, since that’s explained on the back of the card too. So therefore, you know you shouldn’t be using “matching dragons” with this hand. You should be using… “opposing dragons” …instead. “Opposing dragons” (or “opposite dragons”) means “NOT-matching dragons.