The Final Fantasy commander decks are based out of their single games, plus each gets a sizable 25 cards designed for the specific deck
It's easily one of my favorite cards of all time (sorry, Bubble Mew), and while I believe Mega Gengar ex will be the reigning chase of the set from a community standpoint, I think Dragonite will be one of the highest priced cards of the expansion (even if it probably won't make our list of the most expensive Pokmon cards of all time)
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Having multiple Rain Dancers gives Water some excellent protection against Prizing and disruption, making it the premiere Energy acceleration type in Gym Leader Challenge
Modality is important in Commander, as you want your cards to be able to do something useful in all situations
Theres plenty more where that came from, so stay tuned for more