According to Wizards of the Coast, the Gauntlet Soul Stone and Costume Change cards only appear in less than 1% of Collector Boosters
Main Deck 40 Mechanicalchaser X DARK Level 4 [ Machine / Normal ] ATK 1850 DEF 800 A hunter that relentlessly pursues its target by order of the Machine King
Obsidian Flames TypePokmon Collector Number41 RarityUncommon ArtistYukiko Baba Its burning body causes it to be unpopular in hot parts of the world, but in cold ones, Volcarona is revered as an embodiment of the sun. Attacks Flame Cloak30 Attach a Basic Fire Energy card from your discard pile to this Pokmon
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Its still sad to say that Buster Whelp of the Destruction Swordsman still only has 1 print, and hopefully we get to see it shine in a future reprint set or an OTS Tournament Pack
Going for three colours or more has the advantage of getting enough decent cards with cycling