
Instant
Choose one —
• Counter target spell with mana value less than or equal to the number of cards in its controller's graveyard.
• Destroy target creature with mana value less than or equal to the number of cards in its controller's graveyard.
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For spells with in their mana costs, use the value chosen for X to determine the spell's mana value.
If a creature on the battlefield has in its mana cost, X is considered to be 0.