Previous sets have introduced new mechanics, such as Locations in Into The Inklands
Victorious warriors win first and then go to war, while defeated warriors go to war first and then seek to win. This quote sums up why you should focus on your opponents and only engage when you have accumulated maximum knowledge about the battlefield
Pokmon packs present a more complicated version of the problem, because they contain multiple cards and different rarities have different probabilities
Theres a very popular deck in Pioneer known as Greasefang, too
That includes things like the number of named characters, common-level card concepts, or card concepts for fliers
Example: Misty All Water Types you control gain Water Pulse Special Attack ( or Bubblebeam Special Attack if we are strictly sticking to first genereation) Then the special attack would be explained on the trainer's card