Agonizing Demise {3}{B}
Instant
Kicker {1}{R} (You may pay an additional {1}{R} as you cast this spell.)
Destroy target nonblack creature. It can't be regenerated. If this spell was kicked, Agonizing Demise deals damage equal to that creature's power to the creature's controller.
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Cards that do something similar expected a card that isn't here?
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"Destroy target nonblack creature. It can't be regenerated. You gain life equal to its toughness."
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Ghastly Demise 85%
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"Destroy target nonblack creature if its toughness is less than or equal to the number of cards in your graveyard."