In the most famous and mind-boggling example, a Dutch player who opened a preconstructed deck in 2019 to find all 100 cards had been uniquely misprinted has been auctioning them off for an average of $2150 per card
It doesn't copy whether that creature is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on
One should begin by defining the popular rarities, including Holo Rare, Ultra Rare, and Secret Rare cards
Balance Ratios: Aim for 15 Pokmon, 30 Trainers, 15 Energyadjust based on testing
In order to stop Swordsoul, using cards like Lightening Storm to destroy them or Forbidden Droplet to negate their effects can do wonders