In a trading card game long long ago zero was always considered to be a legal number. So you could shuffle zero cards into your deck if your hand had zero cards. But things seem to be changing... == FAST BALL (Skyridge) Q. When using Fast Ball, if the very first card you turn up is an evolution, do you still have to shuffle your deck? A. If FastBall pulls an Evolution Card as the first revealed card, the deck is not shuffled as there are no as there are no "other revealed cards" to shuffle back in. (Jan 15, 2004 PUI Rules Team) well before you would still shuffle the deck but not any longer . so what now with similar game effects? Like Copycat. With zero cards to shuffle in do we no longer shuffle when in the past we would? Or worse with no cards to shuffle are we now unable to even play the card? There are some rullings that indicate that if you can't do everything then you get to do nothing. Why change it? It wasn't broke and unlearning old rules isn't easy. Come on lets leave ZERO the way it was..