That confusion is normal because EX and GX refer to different eras and mechanics in the Pokmon Trading Card Game, and EX in particular can mean two separate types depending on the year
They are booklet cards, box toppers, and patch cards: Booklet cards consist of many panels
That doesnt even count the cost of ink to print on these cards
Because Urzas Saga sees play across a bunch of formats, including Commander, its unlikely the card will be cheap for some time
That legacy plays a huge role in why collectors continue to invest in Pokmon cards year after year
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