Card types:
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Base Summon Card (1 cost, empty summon, 1 HP by default)
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Base Weapon Card (1 cost, empty weapon, 1 ATK by default)
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Base Spell Card (1 cost, empty spell, does nothing)
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Summon Modifier Card (applies new text to a summon)
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Weapon Modifier Card (applies new text to a weapon)
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Spell Modifier Card (apploes new text to a spell)