You begin by placing a basic-tier monster in your active slot - this will be the one attacking or getting attacked - and others in reserve on the Bench
The promos worth looking at are the scarce ones: World Championship exclusives, regional Pokmon Center exclusives that were only available in specific countries, and collaboration promos with limited distribution windows like the Van Gogh Museum Pikachu
If you don't know the rules of Yu-Gi-Oh!, you can find a rulebook and many tutorials online
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Call of the Haunted I was tempted to put this in the Key Cards section, because additional summoning from the Graveyard really is that important
at first, I thought maybe Id just toss in some Pokmon trading cards when I mail those out to paid subscribers in October, but that feels far away, and the world feels dark and heavy, and I have lots and lots of postage stamps, and so why not now