Of course it isn't. You can look over my cards too if you want to see if any of them work for you.

But I guess you really don't have the nature of a duelist if you think that. A card isn't just a card. It doesn't matter, I suppose.

[A light shrug accompanies his words. Their style of dueling... Harry had shown him something unique about it too. It had frightened him... that idea of 'permanently summoned monsters'.]

I think I understand the clue, at least a little. Though not enough to be a direct answer.