As mentioned, players may want the rarest Pokemon cards to ensure they have a top-tier deck for competitions, while collectors may want them to stand out as being the proud owner of a certain card
For instance, Potions, present in just about every deck, now have a new significance - their role is to keep your precious benched Pokmon at full HP, instead of topping up your once-bulky staller in the active slot
If Sheoldred survives until your next turn, you have removed three creatures from the board and likely brought back another powerful attacker
For example, Scarlet & Violet era Ace Spec cards and Sword & Shield era Radiant Pokemon feature similar cross-hatch foil patterns
By combining Eternal Witness graveyard recursion with Fauna Shaman and Survival of the Fittest you can create a deck that's incredibly consistent and can adapt to a wide range of situations