Youll want at least one or two of these in an aggressive deck to deal with your opponents winning position, while control decks will want to fill most of their deck with these cards, spending much of your game removing and disrupting your opponents threats
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Its your classic card draw engine in white weenie decks, and it works particularly well with Wedding Announcement
Double Colorless Energy cards provide two colorless energy points
this then deals specified HP damage to the opposing Pokmon (marked using damage counters), also taking into account weakness (which doubles damage if the opposing Pokmon is weak to your Pokemons type) or resistance (which reduces damage by 30 if it matches your Pokmons energy type)
The rares, on the other hand, are all just decent