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Prevent the next X damage that would be dealt to any target this turn. Until end of turn, you may pay 
any time you could cast an instant. If you do, prevent the next 1 damage that would be dealt to that permanent or player this turn.
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.
