Unfortunately, the more rare the cards are, the more expensive the Wonder Pick will be , but in some ways, that can help indicate which Wonder Picks are probably worth your time
Recently I believe I have been the subject of an incompetent employee at Beckett Grading Services, Anth wrote
I remember building a deck from just the starter deck in Duel Arena, there was no other option because there were initially no structure decks available
If the friending and Wonder Pick method is too slow for you, theres another way to broaden the linguistic horizons of your Pokmon cards
Selesnya is the easiest color for modifications (its the color pair of choice of Auras and +1/+1 counters, and 95% of the best Equipment cards are colorless), but dont sleep on this in just regular ol +1/+1 counter decks: the Trainer buffs all modified creatures, so if you have even put a couple counters on him, everything else that has even one on it will get a big boost during combat