Forced March {X}{B}{B}{B}
Sorcery
Destroy all creatures with mana value X or less.
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Cards that do something similar expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Consume the Meek 81%
$0.19#19344
"Destroy each creature with mana value 3 or less. They can't be regenerated."