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: Counter target spell unless its controller pays 
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ChannelChannelAbility word: lets you discard this card for an effect instead of casting it. — , Discard this card: Counter target spell unless its controller pays 
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Hover an underlined rule to see what it means.
Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.
