Its worth taking some eligible spare cards with you when you set out to play so that you can swap out key Pokmon or Trainer cards as needed
Personally, I think this is a great idea, as in the past there have been criticisms that too many cards in a single set have been serialized
Reprints Throughout the history of the TCG, reprints of cards have been released with the same name and the same tat or game effects, but in different expansions
This information is valuable if you're looking to buy or sell cards or simply understand the value of your collection for insurance purposes or your own personal knowledge, etc
The most impactful card is probably Exterminio, which would translate literally to Extermination but probably references to Overkill, the mechanic from Final Fantasy X, . Exterminio is a black instant removal spell with an interesting twist: setting a creature's health to -9999 plays around indestructible