Weve got a full rundown of chase cards , but youll have more luck finding those in the much, much pricier Collector Boosters
For individual cards and older booster packs and boxes, you will just have to gain a lot of experience and learn the nuances of real Pokemon products and then make educated purchases, ideally with a means of recourse if it turns out you were scammed (some kind of buyer protection program, etc)
If you're unsure if a card is Marked, sleeve it up and try to pick it out of the deck, or ask a friend to do so
Tolsimir Wolfblood
Oftentimes, your commander will be part of your win condition
What exactly that entails is a mystery to us muggles, but keeping track of your cards is a vital part of the process, one that this DIY card scanner (original German