Foreboding Steamboat {3}{B}{B}
Artifact — Vehicle
When this Vehicle enters, each player chooses two nontoken, non-Vehicle creatures they control. Exile them until this Vehicle leaves the battlefield.
Whenever this Vehicle attacks, put a card exiled with it into its owner's graveyard. If you do, investigate.
Crew 2
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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.