A third reason is play testing
The energy cards in the HeartGold & SoulSilver set look incredible, and the secret behind their beauty lies in their background designshonestly, youll wish every new energy card had this art style
But the next card on the list which sold for $493,230 in September 2023 was mass produced in Japan, so if you are a collector, one might have found its way to you
A Curiosity-type card also makes this guy a card draw machine
Master of Waves didnt end up being as valuable as Sphinxs Revelation because you only need it for one deck, and if Mono-Blue Devotion stops being a playable deck (which might happen now that Born of the Gods is here), this card will crash pretty hard
During playtest games, favor opening hands with sideboard cards in them