If the card was very playable in the Trading Card Game then this only made it even more valuable as people enjoy having the rarest cards to make their decks the fanciest around
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+1/+1 counter synergies are very desirable too, and Doubling Season fits perfectly (although this is true for green EDH decks in general)
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This isnt something Ive heard anyone from Wizards of the Coast talk about yet, but if the community reaction is strong enough, its certainly possible for them to implement