It can smooth out your mana in the early game or find you just the right creature as the game drags out
The news comes from the Wall Street Journal (which should, by itself, give you an idea of how big this is), which was tipped off that the card has been registered and graded by PSA, the authentication and grading company
It introduced the concept of dual Weaknesses and Resistances, gave the game the now indispensable Rare Candy Trainer, and was the first Pokmon USA expansion to ship with its own stamped Prerelease promo
It's kind of like you never had to discard at all
The card was one of only two copies produced, and, at present, the existence of the other card is questionable
The portable case allows for easy setup and cleanup, and the decks are easy to hand out, knowing which cards are preloaded