Gaze of Granite {X}{B}{B}{G}
Sorcery
Destroy each nonland permanent 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.
Hidetsugu Consumes All // Vessel of the All-Consuming 99%
$0.60#13750
"Destroy each nonland permanent with mana value 1 or less."
Culling Ritual 85%
$0.43#577
"Destroy each nonland permanent with mana value 2 or less. Add {B} or {G} for each permanent destroyed this way."