Feed the Cauldron {2}{B}
Instant
Destroy target creature with mana value 3 or less. If it's your turn, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")
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Cards that do something similar expected a card that isn't here?
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Smother 100%
$0.21#23106
"Destroy target creature with mana value 3 or less. It can't be regenerated."
Requiting Hex 85%
$0.50#16846
"Destroy target creature with mana value 2 or less. If this spell's additional cost was paid, you gain 2 life."
Expel the Unworthy 84%
$0.05#22767
"Choose target creature with mana value 3 or less. If this spell was kicked, instead choose target creature. Exile the chosen creature, then its controller gains life equal to its mana value."