Languish {2}{B}{B}
Sorcery
All creatures get -4/-4 until end of turn.
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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.
Feast of Succession 99%
$0.26#14588
"All creatures get -4/-4 until end of turn. You become the monarch."
Golden Demise 95%
$0.25#17569
"All creatures get -2/-2 until end of turn. If you have the city's blessing, instead only creatures your opponents control get -2/-2 until end of turn."
Sandman's Quicksand 95%
$0.14#15170
"All creatures get -2/-2 until end of turn. If this spell's mayhem cost was paid, creatures your opponents control get -2/-2 until end of turn instead."