Obsidian Charmaw {3}{R}{R}
Creature — Dragon
This spell costs {1} less to cast for each land your opponents control that could produce {C}.
Flying
When this creature enters, destroy target nonbasic land an opponent controls.
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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.
Magmatic Hellkite 95%
$0.42#7390
"When this creature enters, destroy target nonbasic land an opponent controls. Its controller searches their library for a basic land card, puts it onto the battlefield tapped with a stun counter on it, then shuffles."
Hagra Mauling // Hagra Broodpit 80%
$0.99#2028
"This spell costs {1} less to cast if an opponent controls no basic lands."