I'm glad that rule exists. Could you imagine getting toad locked turn one? Or being hit with Landorus + Strong Energy + Muscle Band + Virbank Laser? Or even something like Charizard EX + Blacksmith + DCE + Muscle Band. At that time, we thought plasma decks were pretty broken, but I think they're small fries compared to some of the stuff we have now. Stuff that is kept from being too broken by the first turn rule.