[quote=@Daxam]
<Snipped quote by Takashi>

Ah, good point. But, what if Zac only uses 50 cards?
[/quote]

That's why he inserted one of the cards already in his deck. Even if the [i]total[/i] number of cards is legal, he'd be over the legal limit of that [i]specific[/i] card. If you're interested in clever ways to cheat, I recommend the animes Legendary Gambler Tetsuya, and Kaiji.