Primitive Justice 

Sorcery
As an additional cost to cast this spell, you may pay {1}{R} and/or {1}{G} any number of times.
Destroy target artifact. For each additional {1}{R} you paid, destroy another target artifact. For each additional {1}{G} you paid, destroy another target artifact, and you gain 1 life.
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Cards that do something similar expected a card that isn't here?
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Dismantle 96%
$0.26#21895
"Destroy target artifact. If that artifact had counters on it, put that many +1/+1 counters or charge counters on an artifact you control."
Raze to the Ground 86%
$0.09#21705
"Destroy target artifact. If its mana value was 1 or less, draw a card."
+1 more matching line