There are a bunch of options, really, from Baleful Mastery and Infernal Grasp, to Price of Fame or Dismember
That said, spending more than you should is really going to be determined by you
No problem, I've gone through the regularly stocked products by big box retailers like Amazon and price-checked them against TCGplayer to make sure you're getting the best bang for your Pokbucks
It cleanly answers impactful boss units like OP06-086-gecko-moria-parallel and OP01-051-eustasscaptainkid-770
Individual cards may be more reasonably priced, but just buying the packs means pouncing on stores the moment they receive stock updates, and then fighting the scalpers to get any
Thats what makes the evolution of Pokmon card types so much fun to track , no matter if youre shuffling into battle or curating a collection