This also makes them more marketable to non-Japanese buyers because unless those buyers actually travel to Japan themselves, buying those Japanese cards from an online seller would be the only way to obtain cards with one-of-a-kind art
My rough answer would be 4-8 pieces of graveyard hate in your sideboard, depending on your archetype, and which hate cards you pick
But the most busted aspect is that all this comes from a colorless card, so it can be leveraged by any deck with a handful of cheap creatures
Mega Evolution Grading Guide Which Mega Evolution cards are worth the $20+/card grading fee
As you may expect, all Cloud versions (Cloud, Ex-SOLDIER, Cloud, Midgar Mercenary, and Cloud, Planet's Champion) all work well with Buster Sword