Here's a list of all the known MTG decks that contain Arena codes inside the box: The Core Set 2021 planeswalker decks include a code to get an MTGA copy of the deck too
Mox Amber has come out on top as the most consistently valuable card from the set, but that's no surprise given the free mana it generates
Avoiding scams
White also has access to Balance type effects, so hypothetically it could make a card that causes some form of universal discard
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