There are 6 Common cards, 1 Common or The List card (The List being special cards, usually reprints, the selection of which can change between sets), three Uncommon cards, 1 non-foil Wild Card (this can be anything from the main set that the booster is a part of), 1 Rare or Mythic Rare from the boosters set, 1 Foil card of any rarity, 1 Basic Land card and, finally, 1 non-playable card, which can be a token, play aide, ad card or art card
(Though now that you've read through this article, hopefully we all realize it's a lot more than that.) It's important to take everything into account and run all the variables we've discussed
While this is terrifying on its own, the Moon holds yet another secret
A raw Dark Charizard Holo in what appears to be good condition might grade as low as a PSA 7 or 8 due to subtle surface issues that are only visible under professional-grade lighting and magnification