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If the player flips heads, the attack works normally but if the player flips tails, the attacking players Pokmon receives 3 damage counters and their turn is over

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Anytime an opponent casts a spell with mana value equal to the number you pick, or they cast a creature with either power or toughness equal to the number you picked, that player loses two life and you get to draw a card

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But why is the Pokmon TCG specifically experiencing such a resurgence right now

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