Battle at the Bridge {X}{B}
Sorcery
Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)
Target creature gets -X/-X until end of turn. You gain X life.
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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.
Virtue of Persistence // Locthwain Scorn 88%
$7.46#1884
"Target creature gets -3/-3 until end of turn. You gain 2 life."
Peppersmoke 86%
$0.25#15398
"Target creature gets -1/-1 until end of turn. If you control a Faerie, draw a card."