Some cards, though, have been included in the Promo-A series, and players can get them directly in the game shop or by completing missions during special events
Here's a full list of the different rarities and how many times each got printed (Source): U2 20.700 U3 31.000 U4 41.300 C1 31.000 C2 62.000 C3 93.000 C4 124.000 C5 155.000 C11 341.000 Examples for U2 cards from Arabian Nights are: Drop of Honey, Serendib Efreet and Juzam Djinn
Venom, Eddie Brock (SPE) $60 Venom, Eddie Brock is a cool way to profit from your villains dying, either in combat or if you sacrifice them
Aerodactyl is great fun if you want to win without doing any damage (no, seriously), the promo Mankey makes Primeape a valid counter to Pikachu ex decks, and Im constantly trying to cook up something Darkness-flavoured to deal super effective damage to all those pesky Mewtwo ex decks I see