Combining this with cards like All Will Be One or Kederekt Parasite (from Duskmourn) can eliminate someone with full life in a single play
Your ability to open packs meanwhile is governed by a 12-hour timer, which you can accelerate with an in-game currency called Pack Hourglasses, and given the level of rarity of different cards - and the scarcity of packs - that means collecting 'em all is going to take a very, very long time
The eighth card, however, is an ad/token card
1 Life Wheel Conveniently track your life total as the game intensifies
This change is by a lot of people mentioned as a misprint, and therefore this Red Cheeks Base Set Pikachu is considered to be the most well-known and easy to find misprint in the Pokmon TCG
Signaling is a complicated concept, and an in-depth discussion is a topic for another time (but see Marshall Sutcliffe's "Signals")