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You can discard 1 card

They often charge a membership fee but offer comprehensive support, including restock alerts for Pokemon cards

Not only do these give you more things to do in every game, but they could help mitigate discard from spells like Cathartic Reunion, or give you extra value from getting milled (intentionally or otherwise)

When the first one gets defeated, send the second Roaring Moon to the Active Spot and stomp your opponents until you win

they don't need to evolve from previous cards

However, if you don't intend to catch the original first edition Pokmon, you can always find the same card in other sets, as Charizard gets re-released every year due to its popularity