Here are two things we generally want to get away from for Game Changers: High-mana value cards
Between Duels, players are allowed to swap out cards in their Deck with a Side Deck of 15 other cards
Official Stores: Distribution is centered on the Pokmon Center Online, which utilizes strict identity verification lottery systems (such as using government identification cards) to prevent unauthorized reselling
If you happen to have both in play, the effect stacks
If you can bounce back an opponents extra deck monster with this effect, theyll be forced to leave it out or summon it again wasting all the materials they spent summoning it in the first place
The card allows a player to reduce the opponent's card count by one, and then it also allows them to see every card the opponent could be planning to use, ruining any hopes of launching a surprise strategy