Dread Cacodemon {7}{B}{B}{B}
Creature — Demon
When this creature enters, if you cast it from your hand, destroy all creatures your opponents control, then tap all other creatures you control.
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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.