I thought the match needed to not exceed 100 cards - none in the actual game do, I know.
Assuming you mean deck size, that's not true.
As shown in this thread (
http://elementscommunity.org/forum/index.php/topic,7919.0.html), Chaos Lord, Elidnis, Ferox, Hermes, Morte, Rainbow, and Scorpio exceed 100 cards, and Destiny, Fire Queen, and Paradox have exactly 100 cards.
I would like to know A) what you meant and B) where you heard that.