buy japanese pokemon booster boxes Scarlet ex Box A rupture in time brings wild beasts and cyber visions to battle in the Pokémon TCG Pokemon 151 Booster Box (Japanese)

Bloodmoon Ursaluna ex - Colorless - HP260 Basic Pokemon Ability: Elder's Technique This Pokmon's Blood Moon attack costs 1 [C] less to use for each Prize card your opponent has already taken

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You can find these treatments in Wilds of Eldraine Draft Boosters, Set Boosters, and Collector Boosters

So no, the rulebreaker ability isn't really broken from a gameplay perspective

Kalitas, Traitor of Ghet is another popular option thats exactly the kind of thing you want against this deck, a big trump that can turn the corner quickly

However, keep in mind that these shops are looking to resell your cards, and they may not pay top dollar