pokemon card swirls 4x Rapid Strike Scroll of 131/163 Battle Styles uncommon NM Card swirls: errors or unique

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A Narrow Miscut, like the Rillaboom V above, occurs in a similar manner

The primary goal of Explore is to either get cards you don't want (or do if you're short on lands) out of your deck and out of your way

However, in this case, the authenticity of the card was more relevant than the card, since its the only one in existence.

Once you get familiar with those main methods of sideboarding, there are a host of small tweaks you can make to improve your deck against what you expect to face from your opponent, but focus on mastering those two first

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